General Volcanic Activity Thread!

[john pike]

HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE Monday, June 23, 2014 7:31 AM HST (Monday, June 23, 2014 17:31 UTC)

This report on the status of Kilauea volcanic activity, in addition to maps, photos, and Webcam images (available at http://hvo.wr.usgs.gov/activity/kilaueastatus.php), was prepared by the USGS Hawaiian Volcano Observatory (HVO). All times are Hawai`i Standard Time.

KILAUEA VOLCANO (VNUM #332010)

19°25'16" N 155°17'13" W, Summit Elevation 4091 ft (1247 m)

Current Volcano Alert Level: WATCH

Current Aviation Color Code: ORANGE

Activity Summary: The eruption continued at the summit and within the East Rift Zone. The summit tiltmeter network recorded weak inflationary tilt and the lava-lake level rose. At the middle East Rift Zone, lava poured from the north spatter cone producing a lava flow within Puʻu ʻŌʻŠcrater that stalled on the cone's west flank; the Kahauale`a 2 lava flow remained active with several breakouts reaching and burning forest at the flow edges. Gas emissions remained elevated.

Recent Observations at KÄ«lauea summit: The summit tiltmeter network recorded continued weak inflationary tilt (+2 microradians/wk). The lava-lake level rose to an estimated 32-33 m (105-108 ft) below the floor of Halema`uma`u Crater by this morning. Gas emissions continued to be elevated: during the week ending on 06/17/14, the summit SO2 emission rate was 2,400-6,400 tonnes/day (see caveat below); the ambient SO2 concentrations near the vent vary greatly, are persistently higher than 10 ppm, and frequently exceed 50 ppm (upper limit of detector) during moderate trade winds. The gas plume typically included a small amount of ash-sized tephra (mostly fresh spatter bits and Pele's hair from the circulating lava lake); the heaviest pieces are deposited onto nearby surfaces while the finer bits can be carried several kilometers before dropping out of the plume.

Seismic tremor levels were low with one dropout (periods when spattering is absent in the lava lake and gas emissions are relatively low) yesterday evening. Twenty-five earthquakes were strong enough to be located beneath KÄ«lauea Volcano in the past 24 hours: 3 in the Ka‘Åiki Pali area, 9 on south flank faults, 4 beneath the summit caldera, 12 within the upper Southwest Rift Zone, 6 within the upper East Rift Zone, and 1 south of PuÊ»u ʻŌʻŠcone within the middle East Rift Zone. GPS receivers spanning the summit caldera recorded about +2 cm of extension of inflationary tilt between May 24 and 31 with an additional +1.8 cm since June 5; the long-term, cross-caldera measurements indicate continued extension at a rate averaging 10 cm/yr (4 in/yr) since March, 2010.

Background: The summit lava lake is within an elliptical crater, which we unofficially call the Overlook crater, which has dimensions of approximately 160 m (520 ft) by 210 m (690 ft), inset within the eastern portion of Halema`uma`u Crater. The lake level has varied from about 25 m to more than 200 m (out of sight) below the floor of Halema`uma`u Crater. The Overlook crater has been more-or-less continuously active since it opened during a small explosive event on March 19, 2008. The lake level responds to summit tilt changes with the lake generally receding during deflation and rising during inflation. During 2013 and early 2014, the lava level has been typically between 30 m (100 ft) and 60 m (200 ft) below the floor of Halema`uma`u Crater. Small collapses in the Overlook crater are common, and over time have resulted in a gradual enlargement of the Overlook crater.

Recent Observations at the middle East Rift Zone vents: Activity levels appear to be increasing. The tiltmeter at Puʻu ʻŌʻŠcone recorded about -0.6 microradians of abrupt deflation between 1:15 and 2:15 pm yesterday while the north spatter cone gushed lava from its tip down its northwest flank to a lava flow advancing mostly west on the crater floor; by sunset, the flow had reached the west flank of Puʻu ʻŌʻŠcone (visible in PWcam starting at 6:55 pm last night). The June 19 lava flow from the northeast spatter cone was no longer active. Glow was persistent from the north (strongest), south, and southeast spatter cones and the small, crusted, lava lake within the northeast spatter cone located on the crater floor within Puʻu ʻŌʻŠcone. GPS receivers recorded about +2.6 cm of extension since June 11, well above the average extension rate of about 8 cm/yr since early 2012; while not indicative of inflation by a shallow magma reservoir, this extension probably results from a very shallow source and may be related to the eruption of several lava flows on the crater floor over the past few days. The most recent sulfur-dioxide emission-rate measurement was 300 tonnes per day on June 16, 2014, from all east rift zone sources; emission rates typically ranged between 150 and 450 t/d since July 2012.

Recent Observations of the Kahauale`a 2 flow: PNcam views yesterday showed active breakouts at the north base of Puʻu ʻŌʻŠcone and distant broad smoke plumes, with multiple glowing points visible at night from both near and distant breakouts. A satellite image from June 20 showed multiple active breakouts in the interior of the Kahauale`a 2 flow extending 7.1 km (4.4 mi) northeast from the Puʻu ʻŌʻŠvent (see map for June 17 mapping results).

 

http://volcanoes.usgs.gov/activity/status.php#yvo

 

more in link above

[john pike]

Stromboli volcano (Eolian Islands, Italy): intense activity, short-lived lava flow on Sciara del Fuoco

Wednesday Jun 25, 2014 12:25 PM | BY: T

Strong eruption from Stromboli's NE vent and a weak lava overflow

Lava overflow on Sunday (image annotated by Culture Volcan)

A lava overflow erupted from the NW hornito on Sunday and traveled approx. 200 m down the Sciara del Fuoco. This followed a particularly intense phase of activity at this vent, marked by frequent and strong explosions and continuous spattering.

Smaller, short-lived overflows have occurred from the same vent since, and activity remains high, with many explosions from several vents:

 

 

[keithlucky]

Interesting to see with all this volcanic activity will we see major world wide cooling take place?

•  â€ƒ Stromboli (Eolian Islands, Italy)
•  â€ƒ Kilauea (Hawai’i)
•  â€ƒ Bagana (Bougainville Island, Papua New Guinea)
•  â€ƒ Manam (Papua New Guinea)
•  â€ƒ Yasur (Tanna Island, Vanuatu)
•  â€ƒ Ambrym (Vanuatu)
•  â€ƒ Colima (Western Mexico)
•  â€ƒ Santa María / Santiaguito (Guatemala)
•  â€ƒ Fuego (Guatemala)
•  â€ƒ Ol Doinyo Lengai (Tanzania)
•  â€ƒ Erta Ale (Ethiopia)
•  â€ƒ Barren Island (Indian Ocean)
•  â€ƒ Nyiragongo (DRCongo)
•  â€ƒ Sinabung (Sumatra, Indonesia)
•  â€ƒ Dukono (Halmahera, Indonesia)
•  â€ƒ Ibu (Halmahera, Indonesia)
•  â€ƒ Lokon-Empung (North Sulawesi, Indonesia)
•  â€ƒ Sangeang Api (Indonesia)
•  â€ƒ Semeru (East Java, Indonesia)
•  â€ƒ Batu Tara (Sunda Islands, Indonesia)
•  â€ƒ Slamet (Central Java, Indonesia)
•  â€ƒ Marapi (Western Sumatra, Indonesia)
•    Ubinas (Peru)
•  â€ƒ Reventador (Ecuador)
•  â€ƒ Shiveluch (Kamchatka)
•  â€ƒ Karymsky (Kamchatka)
•  â€ƒ Zhupanovsky (Kamchatka, Russia)
•  â€ƒ Sakurajima (Kyushu, Japan)
•  â€ƒ Suwanose-jima (Ryukyu Islands, Japan)
•  â€ƒ Nishino-shima (Volcano Islands, Japan)
•  â€ƒ Erebus (Antarctica)

[karyo]

 

Interesting to see with all this volcanic activity will we see major world wide cooling take place?

•  â€ƒ Stromboli (Eolian Islands, Italy)
•  â€ƒ Kilauea (Hawai’i)
•  â€ƒ Bagana (Bougainville Island, Papua New Guinea)
•  â€ƒ Manam (Papua New Guinea)
•  â€ƒ Yasur (Tanna Island, Vanuatu)
•  â€ƒ Ambrym (Vanuatu)
•  â€ƒ Colima (Western Mexico)
•  â€ƒ Santa María / Santiaguito (Guatemala)
•  â€ƒ Fuego (Guatemala)
•  â€ƒ Ol Doinyo Lengai (Tanzania)
•  â€ƒ Erta Ale (Ethiopia)
•  â€ƒ Barren Island (Indian Ocean)
•  â€ƒ Nyiragongo (DRCongo)
•  â€ƒ Sinabung (Sumatra, Indonesia)
•  â€ƒ Dukono (Halmahera, Indonesia)
•  â€ƒ Ibu (Halmahera, Indonesia)
•  â€ƒ Lokon-Empung (North Sulawesi, Indonesia)
•  â€ƒ Sangeang Api (Indonesia)
•  â€ƒ Semeru (East Java, Indonesia)
•  â€ƒ Batu Tara (Sunda Islands, Indonesia)
•  â€ƒ Slamet (Central Java, Indonesia)
•  â€ƒ Marapi (Western Sumatra, Indonesia)
•    Ubinas (Peru)
•  â€ƒ Reventador (Ecuador)
•  â€ƒ Shiveluch (Kamchatka)
•  â€ƒ Karymsky (Kamchatka)
•  â€ƒ Zhupanovsky (Kamchatka, Russia)
•  â€ƒ Sakurajima (Kyushu, Japan)
•  â€ƒ Suwanose-jima (Ryukyu Islands, Japan)
•  â€ƒ Nishino-shima (Volcano Islands, Japan)
•  â€ƒ Erebus (Antarctica)

 

Of course not! The current activity is not enough to cause any cooling. If anything, April and May were globally the warmest on record!

 

Karyo

[Buriedundersnow]

Of course not! The current activity is not enough to cause any cooling. If anything, April and May were globally the warmest on record!

 

Karyo

 

 

may was the warmest may on record I'm sure I read somewhere that april was around the 5th or 6th warmest april on record and even though may was warmest on record it was only either the 258th or 285th warmest month on record cant remember what way round the 5 and 8 were but it was defo in the 2 hundreds.

[karyo]

may was the warmest may on record I'm sure I read somewhere that april was around the 5th or 6th warmest april on record and even though may was warmest on record it was only either the 258th or 285th warmest month on record cant remember what way round the 5 and 8 were but it was defo in the 2 hundreds.

My info comes from the Global Temperatures thread. Either way, we are certainly not cooling.

 

Karyo

[Buriedundersnow]

My info comes from the Global Temperatures thread. Either way, we are certainly not cooling.

 

Karyo

 

 

cant remember where I saw mine.

 

I have seen things posted on twitter and in articles showing the last few years have been on s slight cooling trend but its whether to believe them or not will look up that thread though

 

don't know if this has been posted here yet some great pics in the daily mail of Kilauea

 

http://www.dailymail.co.uk/news/article-2670825/Theres-lava-end-rainbow-Amazing-pictures-Hawaiian-volcano-erupting-elements-striking.html

[john pike]

Three new volcanoes were spotted in southeast Australia; one is 4 million years old and another spits out ash after magma quickly cools. The researchers believe there are likely many more such erupters waiting to be discovered in the area.

The researchers from Monash University in Australia discovered the volcanoes by combining satellite images with NASA topography models. The models revealed locations where the distribution of magnetic minerals resembled that commonly found in a volcanic center; this is the center of a volcano's mound, where such minerals and ash are concentrated. Once the researchers located the potential new volcanoes, the team visited the sites to confirm.

"This technique has already helped to uncover a lot more volcanoes in the area," lead researcher and graduate student Julie Boyce told Live Science in an email. "As part of my ongoing research, I have found another 20 probable small eruption centers. I haven't driven out to visit most of them yet, though." [See Amazing Photos of the World's Wild Volcanoes]

 

The three new volcanoes are part of the Newer Volcanic Province (NVP) in South Australia. The region has over 400 known volcanoes and includes some of the youngest volcanoes in the country. Those found in this region are not considered "typical volcanoes," Boyce said. They form when magma bubbles up from the Earth's mantle about 30 miles (50 kilometers) below the surface and hardens to form small volcanoes less than 330 feet (100 meters) high. Typical volcanoes form when tectonic plates collide or break apart.

The new survey of the NVP region covered an area of about 7,335 square miles (19,000 square km). The largest of the three new volcanoes, named Cas Maar, is almost 0.6 miles (1 km) wide, and is an unusually large volcano for the area, Boyce said. Cas Maar is a special kind of volcano that forms when magma hits groundwater, rapidly cools and spits out an ashy eruption. Boyce said Cas Maar is probably around 300,000 years old.

 

Jays Hill's volcanic center is in the middle of the image. The steep sides form from lava flow.
Credit: Julie Boyce

View full size image

The other two volcanoes are lava shields, which form from layers of lava flow. Boyce named one Jays Hill and estimates it is almost 2 million years old. She named the other Burgers Hill and it is about 4 million years old.

 

Even though none of volcanoes in the area have erupted in the past 5,500 years, scientists still consider the NVP area an active volcano region. Since the Earth's mantle remains very hot and is still releasing carbon dioxide, which means magma is coming to the surface. The area has averaged at least one volcano eruption every 10,800 years, so geologists think future eruptions are still possible.

"Finding undiscovered volcanoes is really important for calculations of eruption frequency, which is the active time of the volcanic field divided by the number of volcanoes," Boyce said. "So the more we know about the province, the better calculations we can make, and the more we know about the kinds of eruptions we get."

 

http://www.livescience.com/46569-new-australian-volcanoes-discovered.html

[john pike]

Volcanoes Today, 29 Jun 2014: Stromboli, Kilauea, Sakurajima

Sunday Jun 29, 2014 12:00 PM |

Eruption at Stromboli this morning (INGV Pizzo webcam)

Ash plume hovering over the southeastern sector of Sakurajima this morning (Tarumizu webcam)

The new lava flow seen yesterday (USGS)

Stromboli (Eolian Islands, Italy): Activity remains elevated. A high level of magma causes continuous spattering and many strombolian eruptions from several vents on the crater terrace:

Frequent rockfalls are occurring on the Sciara del Fuoco, but (so far at least) no new lava overflows.

 

Sakurajima (Kyushu, Japan): A stronger phase of activity is occurring at the volcano. During the past 24 hours, 4 vulcanian-type explosions were registered, ejecting ash plumes to up to 13,000 ft (4.2 km) altitude.
In addition, the volcano has continuous phases of ash emissions following the explosions. Ash plumes, some of them relatively thick have been drifting S, SE and E.
Compared to last year, the volcano has been less active, however. So far, there have been approx. 240 recorded eruptions (explosions), while this number last year at the same time was already almost double (435).

Kilauea (Hawai'i): A new lava breakout occurred Friday early morning (local time) from a new vent on the outer northern flank of Pu'u 'O'o crater. It feeds a new lava flow with several branches headed to the north and northeast. The most advanced of the them traveled to the NW and had quickly reached a length of approx 1 km yesterday, but has not advanced much since.
The event was marked by a sudden deflation of the cone, indicating that magma drained from underneath the Pu'u 'O'o crater terrace and moved to the new vent. This rapid drop in magma level under the crater terrace resulted in the collapse of several of the spatter cones. Until yesterday, these had been the site of frequent overflows and were feeding the Kahaual'a2 flow field.
Overall, activity at the volcano has been relatively stable over the past months, with good magma supply to both the summit lava lake in Halema'uma'u and the Pu'u 'O'o vents on the eastern rift zone in 10 km distance. The new vent at Pu'u 'O'o is simply a change in the surface configuration of vents for Kilauea's continued magma supply.

 

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Xinhua News Agency June 29, 2014 5:46pm 2nd LD Writethru: Mount Sinabung in Indonesia erupts, triggering massive evacuation

     

   

2nd LD Writethru: Mount Sinabung in Indonesia erupts, triggering massive evacuation

JAKARTA, June 29 (Xinhua) -- Powerful burst of hot ash erupted from one of the most active volcanoes in Indonesia, Mount Sinabung in Karo district of North Sumatra, on Sunday evening, triggering massive evacuation, official disclosed here.

The eruption occurred only months after the volcano had erupted intermittently from September to February which left 15 people dead, more than 30,000 other internally displaced and a warning to aviation.

Sunday's eruption occurred at 19:29 p.m. Jakarta time (1229 GMT) with 4,000 meter high column of ash spewed to the sky, Sutopo Purwo Nugroho, spokesman of national disaster agency said.

The hot ash slid into southeast of the crater by up to 4,500 meter, he said. "Until now, the number of evacuee chalks up to 14,382 people," Sutopo told Xinhua via phone.

"The rise of seismic activity has been disseminated among people, hence the condition remains safe," he added.

Mount Sinabung is among more than 120 active volcanoes in Indonesia, which is prone to seismic upheaval due to its location on the "Pacific Ring of Fire."

The volcano rumbled back in September 2013 after being dormant for 400 years. The Indonesian transport ministry warned flight to stay away from the path near the volcano.

 

http://www.globalpost.com/dispatch/news/xinhua-news-agency/140629/2nd-ld-writethru-mount-sinabung-indonesia-erupts-triggering-

Edited June 29, 2014 by john pike

[john pike]

Volcanic activity worldwide 30 Jun 2014: Stromboli, Ubinas, Sinabung, Nishino-shima

Monday Jun 30, 2014 16:38 PM |

Webcam images of the lava flow on Stromboli's Sciara del Fuoco this night and morning

Indandescents blocks from the second lava lobe that produced the collapse yesterday (image of unknown date: ANTARA FOTO/Irsan Mulyadi via Liputan6)

Vulcanian eruption at Ubinas this morning

Stromboli (Eolian Islands, Italy): Activity at the volcano increased further and produced several lava overflows both inside the crater and on the upper Sciara del Fuoco. At the moment, the latter one is still active and has a length of approx. 200 m.

Following intense phases of continuous spattering (or small lava fountaining) from the central and other vents, accompanied by increasing tremor, a first intra-crater lava flow started around 08:30 local time from the NE hornito (S2).

Shortly after, starting from 11:18 an effusive vent starts to open up on the outer northwestern slope of the crater terrace, some ten meters beneath the NW vent complex (vent S3), and issue a lava flow directly onto the Sciara.

Both lava flows were relatively short-lived, while strombolian and spattering activity continued intense at the various vents.

Nishino-shima (Volcano Islands): An explosive event occurred last night at the growing island volcano. VAAC Tokyo reported an ash plume at 10,000 ft (3 km) altitude drifting to the northeast.

Sinabung (Sumatra, Indonesia): An unusually large collapse of parts of the still active lava flow occurred last night at around 19:30 local time and produced a large, dangerous pyroclastic flow that traveled approx. 4.5 km to the SE. There are no reports of injuries or fatalities, hopefully because no one was in the affected part of the exclusion zone. The flow had stopped in the immediate vicinity of the evacuated villages Berastapu and Sukanalu.

The collapse developed from the second lobe which has been active on the upper, steeper, and thus more prone to collapse, part of the slope on top of the older lobe. The pyroclastic flow also gave rise to an ash plume rising approx. 4 km.

So far, most collapses had been small, but this event shows that the volcano remains extremely dangerous.

 

Ubinas (Peru): A moderately sized vulcanian-type (sudden, vent-clearing) explosion occurred at the volcano this morning at 09:00 local time. An ash plume rose approx. 2 km from the crater and drifted east.

[john pike]

Volcano Activity in Philippines on Monday, 30 June, 2014 at 06:55 (06:55 AM) UTC.

 

Two rockfall events and white steam plumes were observed in the last 24 hours at Mayon Volcano in Bicol, the Philippine Institute of Volcanology and Seismology (Phivolcs) said Monday. In its Monday update, Phivolcs said Mayon's seismic network detected two rockfall events and no volcanic earthquake, and no crater glow. However, it said there was "moderate emission of white steam plumes that drifted northeast to southwest." Phivolcs said Mayon's alert status remains at "1," which still means it is at "abnormal condition." It reminded the public not to enter the 6-km radius Permanent Danger Zone (PDZ) due to the "perennial life-threatening dangers of rockfalls, landslides/avalanches at the middle to upper slope, sudden ash puffs and steam-driven or phreatic eruptions from the summit." "Active stream/river channels and those identified as perennially lahar-prone areas on all sectors of the volcano should also be avoided especially during extreme weather conditions when there is heavy and prolonged rainfall," it added. Earlier this month, residents noted wells at the foot of the famous volcano have started drying up, which they believe to be another sign of restiveness from Mayon Volcano. Residents in Barangay Masarawag in Guinobatan, Albay had noticed difficulty in getting water from their wells, according to a report Wednesday on GMA News TV's "News to Go." They believe this could be connected to Mayon's recent activity. Masarawag is eight kilometers away from the volcano's crater, according to a hazard map of Phivolcs. Also, they noted many animals such as snakes had been coming down from the volcano's higher areas. But Phivolcs said it is still too early to conclude the drying up is due to abnormalities of the volcano, though it noted more white smoke coming from Mayon.

 

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=VA-20140630-44352-PHL

[john pike]

volcanic activity worldwide 1 Jul 2014: Stromboli, Kilauea, Ubinas, Sabancaya, Santa María / Santia...

Tuesday Jul 01, 2014 16:32 PM |

Lava overflow from Stromboli's NE vent inside the crater terrace

Explosion at Shiveluch volcano yesterday evening (KVERT webcam)

The new lava flow NE of Pu'u 'O'o seen from the North Rim webcam (HVO) today

Fuego volcano this morning (INSIVUMEH)

Ash plume from Reventador volcano this morning

Sabancaya volcano on 26 June with blue and grayish gas emissions (A) and steaming (B) (IGP)

Ubinas volcano today with a tiny steam puff

Stromboli (Eolian Islands, Italy): The activity at the volcano remains at similar elevated levels with strong spattering, intense strombolian explosions and lava overflows.

Today, both the intra-crater lava flow and the one overflowing onto the upper Sciara del Fuoco from the NE hornito vent remain intermittently active. The following time-lapse video shows the latter seen from INGV's thermal webcam on the Sciara del Fuoco:

 

Shiveluch (Kamchatka): A moderate explosion occurred at the volcano yesterday evening (or this morning in local time). An ash plume rose to approx. 23,000 ft (7 km) altitude.

Overall, the volcano has been in a comparably quiet phase recently.

Kilauea (Hawai'i): The new June 27 lava flows continue to be very active, at expense of the previously active Kahaualeʻa 2 flow which seems to have stopped being active.

The lava flows expanded in area and extended approx.1.6 km (1 mi) northeast of Puʻu ʻŌʻŠcone yesterday, HVO reports. It is believed that only the lowest-elevation fissure on the NE flank continued to erupt lava on Saturday.

Pavlof (Alaska Peninsula, USA): "Weak thermal signals from recent lava flows persist in satellite images. Small, discrete seismic events continue, however, and eruptive activity could resume at any time with little or no warning." (AVO)

Shishaldin (United States, Aleutian Islands): According to the Alaska Volcano Observatory, "low-level eruptive activity continues.

Consistently elevated temperatures at the summit of Shishaldin Volcano were recorded in satellite images over the past 24 hours. No significant seismicity was noted. Web camera images showed no significant plume." (AVO)

Semisopochnoi (United States, Aleutian Islands): The earthquake swarm that began on June 9 continues. No sign of activity was noted in satellite images over the past 24 hours. (AVO)

Santa María / Santiaguito (Guatemala): Weak effusive activity (extrusion of very viscous blocky lava) on the upper east and southeast flanks of the Caliente dome continues and produces small avalanches. Strong degassing (but no explosions) were observed from the summit of the dome.

Fuego (Guatemala): No significant changes in activity have occurred at the volcano recently. It remains characterized by weak to moderate strombolian explosions every 1-2 hours on average, ejecting incandescent material to up to 150 m above the vent and producing ash plumes that rise 300-700 m.

Reventador (Ecuador): Effusive-explosive activity at the volcano continues, but has decreased following the recent surge of lava emission that ended about a week ago.

The observatory mentions moderate activity with continuing intermittent small explosions and ash emissions. A thermal signal on MODIS satellite data shows hot deposits in the crater and on the upper eastern flank, indicating that fresh magma continues to arrive at the summit.

Sabancaya (Peru): Signs continue to show up that the volcano might be awakening: Peru's Geophysical Institute (IGP) who monitors the volcano has detected a slight increase in volcanic unrest recently. Both seismic and fumarolic activity at the volcano increased during the past 4 weeks (since 3 June).

Peaks in occurrence of so-called hybrid earthquakes were detected during 18, 19 and 21 June with 146, 157, and 216 recorded events. These quakes are believed to be indicators of magma rising at depth beneath the volcano.

Hypocenter depths of volcanic-tectonic earthquakes, indicators of rock-fracturing caused by internal fluid pressure and/or rising magma, have been showing an upwards trend: at the moment, they mostly range between 16 km (NE side), 10 km (E) and 6 km on the northern flank.

Fumarolic emissions have become more pronounced as well. Bluish gas of magmatic SO2, white steam (water vapor) and sometimes light gray-colored emissions, possibly from small amounts of ash, were observed during a visit to the volcano.

Ubinas (Peru): Following the relatively large explosion yesterday, the volcano has remained calm today so far.

IGP's latest report mentions that while activity has been overall on a decreasing trend over the past weeks, yesterday's explosion was preceded by a 50 hours-long swarm of hybrid earthquakes, that resulted from the accumulation of new magma under the vent. Once the eruption had finished, the seismic activity dropped back to normal levels.

The explosion itself ejected blocks and bombs to up to 1,5 km distance onto the NW upper flank of the volcano.

[john pike]

Authorities have issued a "yellow alert" for a region in central Colombia following minor seismic activity in one of the country's most active volcanos. At 2:29 AM on Sunday morning, a 2.9 magnitude earthquake hit the Nevado del Ruiz volcano, according to the Volcanological and Seismological Observatory in the nearby city of Manizales. The yellow alert signifies that affected areas in the bordering states of Tolima and Caldas should remain vigilant in the face of potentially shifting volcanic activity brought on by the earthquake. At 17,457 feet tall, the Nevado del Ruiz is one of Colombia's most hulking volcanoes, with an eruptive history stretching back 1.8 billion years. The volcano is characterized by pyroclastic flows that cause mudslides, or lahars. In 1985, one such lahar, the biggest on record, made international headlines, burying at least three surrounding towns and killing 25,000 people. Previous reports have indicated that the Nevado is poised for another eruption in the near future, an event that could carry devastating consequences for nearby populations. As recently as last May, another minor earthquake sent plumes of ash drifting over surrounding towns. So far, there has been no indication that any major event is proximate, though authorities have not said when they plan to lift the alert.

 

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=VA-20140701-44362-COL

[john pike]

Volcanic activity worldwide 2 Jul 2014: Stromboli, Fuego, Reventador, Slamet, San Miguel, Etna

Wednesday Jul 02, 2014 17:09 PM |

The crater terrace of Stromboli this morning (Pizzo webcam, INGV Catania).

Ash emission from the New SE crater this morning.(EtnaTrekking webcam)

Tremor amplitude at Chaparrastique volcano over the past weeks (MARN)

The pyroclastic flow from Reventador's explosion this morning

Stromboli (Eolian Islands, Italy): The activity, although still quite intense for Stromboli standards, has decreased. No new or only very small lava overflows occurred from the vents.

Tremor has returned to normal levels.

A relatively large rockfall occurred at the Sciara del Fuoco yesterday morning at 09:23 local time.

Etna (Sicily, Italy): Occasional weak explosions continue at the New SE crater. The volcanic tremor signal is still low.

Slamet (Central Java): The strombolian-type eruption inside the summit crater of the volcano which began in March still continues or has resumed. A series of small explosions was observed this morning.

Local observers noticed ash plumes rising several hundred meters above the crater rim.

Fuego (Guatemala): Activity has increase since last night. A new lava flow started to issue from the summit vent and traveled onto the SE slope towards the Trinidad canyon. This morning, it had reached a length of 150 m. Explosions have become stronger as well, generating ash plumes of sometimes more than 1000 m in height.

San Miguel (El Salvador): Ash emissions have occurred increasingly at Chaparrastique volcano and tremor has risen again sharply to its highest level ever. Volcanologists from MARN in El Salvador are on high alert of a possible impending stronger eruption.

Reventador (Ecuador): A strong explosion occurred at the volcano this morning at 06:50 local time. It produced a heavily loaded, dense eruption column that collapsed into a pyroclastic flow that swept down the flank of the cone:

 

 

Before and after, several smaller explosions also occurred as well. The current series of eruptions has been accompanied by an increase in seismic activity since last night.

[john pike]

Volcanic activity worldwide 3 Jul 2014: Nyamuragira, Ubinas, Kusatsu-Shirane, Tacana, Etna, Santa Ma...

Thursday Jul 03, 2014 17:14 PM |

Perfect steam ring from Mt Etna (photo copyright: Emanuela / VolcanoDiscovery Italia)

Evolution of the lava lobe at Sinabung volcano (VSI)

Glow at Popocatépetl volcano at night (CENAPRED)

Recent earthquakes near Tacaná volcano

Eruption at Ubinas volcano today

This satellite image from 30 June shows lava lakes and gas plumes from Nyamuragira and Nyiragongo Volcanoes. Landsat 8 image, published by NASA Earth Observatory

Etna (Sicily, Italy): A late addition from the last eruption at Mt. Etna volcano.

Karymsky (Kamchatka): According to KVERT, strombolian to vulcanian explosive activity continues. Recorded seismic activity was moderate.

Bezymianny (Central Kamchatka Depression): Very weak activity continues at the volcano. During the past week, KVERT registered shallow earthquakes. Video data captured minor gas-and-steam plumes rising from the volcano.

Kusatsu-Shirane (Honshu): JMA reported that deformation of Kusatsu-Shiranesan’s crater and the elevated temperatures which began earlier in March, continued during 25-30 June.

This activity has been focused in the area immediately of N of Mizugama crater. Some seismicity was also reported, although tremor was absent. The Alert Level remains at 2 (on a scale of 1-5). (Smithsonian / USGS Weekly Volcanic Activity Report, 25 June-1 July 2014)

Batu Tara (Sunda Islands, Indonesia): Strombolian activity continues. An ash plume from a stronger event was detected this morning on satellite imagery (VAAC Darwin).

Sinabung (Sumatra, Indonesia): VSI published a new status report which indicates that effusive activity at the volcano still continues. The lava lobe still grows at very slow rate with an overall decreasing trend over the past months.

Earthquake activity related to magma movements (hybrid and volcano-tectonic) has more or less ceased. However, as Sunday's collapse event and pyroclastic flow showed, the volcano remains dangerous and alert level remains at 3 on a scale of 1-4, "Siaga" ("alert").

Popocatépetl (Central Mexico): No significant changes in activity have occurred over the past weeks. Following a very quiet period, the volcano has become a bit more active in the past days with an increased number of steam and gas emissions.

Glow is visible at the summit at night, indicating the presence of fresh magma. A significant SO2 plume was drifting from the volcano yesterday.

Tacana (Mexico / Guatemala): A number of shallow earthquakes has occurred recently under the volcano. The largest was a magnitude 4.0 event at 5 km depth under the eastern flank. No reports of unusual activity at the volcano are available.

Santa María / Santiaguito (Guatemala): Activity remains low. The observatory reported sporadic small explosions and small avalanches from active block lava flows on the east and southeast flanks of the Caliente dome.

Fuego (Guatemala): The new lava flow continues to slowly advance on the upper SE flank and reached a length of 200 m this morning. Strombolian-type eExplosions have been relatively frequent and weak to moderate in size, generating ash plumes up to 800 m tall.

Ubinas (Peru): A small explosion occurred this morning (09:15 local time) at the volcano and produced a small ash plume:

 

 

Nyamuragira (DRCongo): A new eruption is occurring at the volcano. A lava lake has appeared in the main pit inside its summit caldera, but so far, reports of lava flows (presumably from flank vents) on the northern slope of Nyamuragira could not be verified.

A recent Landsat satellite image shows the new lava lake, and thermal anomalies as well as increased SO2 concentrations above the close-by Nyiragongo and Nyamuragira have been detected over the past days.

Nyamuragira (also spelled Nyamulagira) volcano, located just north of the Congolese city of Goma, near the border with Rwanda, is a large basaltic shield volcano and one of the most active volcanoes in the world. It erupts on average every 2 years - the last one was in 2012.

[john pike]

Katla volcano

 

http://volcanodiscovery.com/katla-earthquakes.html

 

 

 

http://en.vedur.is/earthquakes-and-volcanism/earthquakes/myrdalsjokull/

 

interesting run of quakes at katla today

 

maybe worth keeping an eye on for now

[john pike]

another interest at present

 

http://hisz.rsoe.hu/alertmap/site/index.php?pageid=seism_last&rid=417181

 

a run of largish quakes near plip submarine volcano

 

info

Dredged rocks from the summits of volcanic cones rising from 2500 m depth to within a few hundred meters of the surface yielded fresh dacitic lavas and pumice apparently of Holocene age (Fedotov et al., 1989; Seliverstov et al., 1986). Tephrochronological studies on the Commander Islands suggest that the latest tephras from Piip volcano may be as young as a few centuries, and echograms indicate present-day gas emission from the volcano. The three steep-sided volcanic cones were constructed along a N-S trend and lie about 140-150 km from the axis of the Aleutian trench, a similar distance as other Aleutian arc volcanoes. The southern and northern cones exceed the central cone in size and have craters open to the SW about 500 and 300 m wide, respectively. A lava dome occupies the southern crater, and other domes or parasitic cones are found on the summit cones and flanks of the edifice. Vigorous gas emission from the northern cone rises about 300 m from "black smoker" vents on the crater floor.

 

http://www.volcanodiscovery.com/piip.html

 

[john pike]

Volcanoes Today, 4 Jul 2014: Stromboli, Ambang, Slamet

Friday Jul 04, 2014 17:00 PM |

This afternoon's new lava flow on the Sciara del Fuoco

Stromboli's new lava flow this morning (INGV webcam)

Number of seismic signals related to explosions (letusan), ash/steam venting (hembusan), shallow (dangkal) and other volcanic earthquakes, as well as local and distant tectonic events over the past months and corresponding alert statuses at the volcano (VSI)

Stromboli (Eolian Islands, Italy): A second, powerful surge of lava, again from the NE vent, started short time ago and has been feeding a new lava flow that quickly descended several 100 meters the upper Sciara del Fuoco (s. video below).
The first flow from earlier today, that had started at around 04:50 local time, had in the meanwhile decreased and eventually stopped in the hours after 12:00.

Tremor has risen again as well, and a smaller lava overflow from the NE hornito is visible inside the crater terrace. Strombolian explosions continue to be intense and frequent at the summit vents.

...4 Jul:
A new and relatively well-fed lava flow started to flow onto the Sciara del Fuoco early this morning (from around 4:45 local time). The vent of the overflow is again the NE hornito.
At the moment, the flow is still active and has a length of approx 2-300 m on the upper Sciara beneath the NE crater.

Slamet (Central Java): According to the latest report by VSI, both the number of explosions observed and corresponding seismic signals have increased over the past days.
17 eruptions were observed during 1-2 July, compared to 14 during 15-30 June. Ash plumes have been rising up to 1,4 km above the crater and glow / incandescent material was occasionally observed.
The intensity of current activity at Slamet is still within the range of level 2 on a scale of 1-4 (Waspada:"watch"), comparable to March-April. VSI warns that explosions could eject lava bombs to up to 2 km distance.

Ambang (North Sulawesi & Sangihe Islands): A swarm of volcanic earthquakes that started yesterday under the volcano prompted VSI to raise the alert status from normal to waspada (2 on a scale of 1-4).
During 3 July, 62 volcanic quakes were detected, compared to averaged of 1-2 per day during the previous weeks. A light steam plume could be observed from the volcano's summit.
The remote volcano had its last eruption in 2005, when phreatic explosions occurred.

 

 

http://www.volcanodiscovery.com/volcanoes/today.html

Edited July 4, 2014 by john pike

[john pike]

[john pike]

Etna volcano - eruption update New effusive vent at E base of North-East Crater

Update Sun 06 Jul 11:38

A new effusive vent opened yesterday afternoon on the eastern base of the North-East crater feeding a small lava flow.

The effusive vent this morning (Milo webcam, INGV Catania)

Thermal image of the small lava flow this morning (Monte Cagliato webcam, INGV Catania)

 

http://www.volcanodiscovery.com/etna/current-activity.html

[john pike]

 

Shiveluch, one of the largest and most active volcanos of Russia's far-eastern Kamchatka Peninsula, has spewed a plume of ash as high as 8 km into the air, the Kamchatka Emergency Service reported on Sunday.

"The wind is driving the ash cloud southeastwards. There are no populated centers along its path," the report says.

Although no ash fallouts have been registered in the Ust-Kamchatsky district, rescuers have recommended tourist operators to cancel tours in the vicinity of the volcano.

The orange-level volcanic alert has been issued for aircraft flying over the peninsula.

It's the second ash plume ejected by Shiveluch since the beginning of July. On July 1, a cloud of ash shot up 7 km above sea-level.

The town of Klyuchi with a population of 5,000 is the nearest community to the 2,500-high volcano, 45 km away from it.

After Shiveluch intensified in May 2009, a crack about 30 m deep appeared in its dome.Read more: http://voiceofrussia.com/news/2014_07_06/Kamchatkas-Shiveluch-spews-new-ash-plume-8-km-into-sky-9272/

[john pike]

http://volcanoes.usgs.gov/volcanoes/long_valley/long_valley_monitoring_1.html

Long valley caldera

Swarm ongoing at present

[keithlucky]

Interesting read http://t.co/TBuFtR4wEc

[john pike]

Volcanic activity worldwide 7 Jul 2014: Etna, Stromboli, Santa María / Santiaguito, Nyamuragira, Fu...

Monday Jul 07, 2014 18:30 PM |

New lava overflow on Stromboli's Sciara del Fuoco this morning (INGV thermal webcam)

Current tremor amplitude (ESLN station, INGV Catania)

Eruption from Shiveluch volcano yesterday (KVERT webcam)

Eruption of Sakurajima Sunday morning (local time)

Seismic signal from this morning's earthquake at Santiaguito (STG2 station, INSIVUMEH)

Fuego volcano yesterday morning (INSIVUMEH)

Small ash puff from Ubinas this morning

SO2 plume over Nyiragongo / Nyamuragira volcanoes (NOAA)

Stromboli (Eolian Islands, Italy): After a weekend with comparably low activity and no lava overflows, a new surge of lava effusion has started and a small lava overflow is again active on the upper Sciara del Fuoco.

Tremor is elevated as well.

Etna (Sicily, Italy): The lava flow continues to advance slowly from the new fissure vent into the Valle del Leone. Tremor has been rising gradually overall, but is still low.

The following time-lapse from 14:00 local time Saturday until now shows the arrival of the new dike causing the new fissure vent to open and the advance of the lava flow:

 

Shiveluch (Kamchatka): Several small to moderate explosions occurred at the active lava dome during the past days. Ash plumes were reported to up to 27,000 ft (8 km) altitude.

Sakurajima (Kyushu, Japan): The volcano had a busy weekend with at least 6 explosions during 48 hours. The largest produced an ash plume to 12,000 ft (3.6 km) altitude.

Batu Tara (Sunda Islands, Indonesia): Explosive activity has been pronounced during the past days. Several ash plumes were spotted on satellite data, indicating relatively strong strombolian eruptions.

Sangeang Api (Indonesia): Activity continues at least intermittently. An ash plume at estimated 9,000 ft (2.7 km) altitude was observed Friday extending almost 100 km to the NW (VAAC Darwin).

Santa María / Santiaguito (Guatemala): According to INSIVUMEH, a "very strong and prolonged" earthquake occurred under the volcano this morning at 05:25 local time. Paintings in houses were bouncing and small landslides occurred in steep river bed sides. The earthquake also triggered small avalanches on the steep flanks of the active Caliente lava dome.

Last night, an explosion with visible incandescent material occurred at 18:57. During the night, intermittent glow could be seen from the summit area of the dome. Incandescence was also observed from the upper eastern flank of the dome, where a blocky lava flow continues to be weakly active.

Fuego (Guatemala): The latest lava flow seems to have stopped. The volcano remained in its typical persistent type of activity, with intermittent mostly weak to moderate strombolian explosions. Incandescent material was ejected to 50-100 m and ash plumes rose up to 400 m above the summit.

Strong jet-like degassing noises accompany the eruptions.

Ubinas (Peru): The volcano has been very calm except for one or very few small ash explosions during the past days.

Nyamuragira (DRCongo): The new eruption continues in the form of a lava lake in the summit caldera. No evidence of lava flowing on the flanks of the giant volcano is availabe.

Thermal satellite data show the hot spot at the summit and a large SO2 plume from both Nyamuragira and neighboring Nyiragongo, which also has a (very active) lava lake, are evidence of this.

Unfortunately, the area of both volcanoes is still unsafe to travel to.

[john pike]

Increased conductivity and higher water levels have been recorded in the rivers Jökulsá and Múlakvísl, both of which drain from the Katla caldera in Mýrdalsjökull. Sulfuric smells have increased at both sites but gases coming from under the glacier can cause irritation in eyes and nose and can in rare cases cause people to pass out due to lack of oxygen.

 

http://en.vedur.is/#tab=vatnafar

 

http://en.vedur.is/earthquakes-and-volcanism/earthquakes/myrdalsjokull/

 

interesting info from iceland met office

 

still hard to call what happens next