General Volcanic Activity Thread!

[john pike]

volcanoes Today, 18 Feb 2014: Kilauea

Tuesday Feb 18, 2014 21:03 PM |

Kilauea (Hawai'i): The tiltmeter at Pu`u `O`o recorded the start of DI deflation tilt at 9 pm yesterday - around 14.5 hours after the summit DI deflation tilt!

 

 

 

http://www.volcanodiscovery.com/hawaii/kilauea/current-activity.html

 

 

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

 

swarm list above

Edited February 18, 2014 by john pike

[john pike]

Volcanoes, including Mt. Hood, can go from dormant to active in a few months

 

A new study suggests that the magma sitting 4-5 kilometers beneath the surface of Oregon's Mount Hood has been stored in near-solid conditions for thousands of years, but that the time it takes to liquefy and potentially erupt is surprisingly short -- perhaps as little as a couple of months.

 

http://www.sciencedaily.com/releases/2014/02/140216151713.htm

 

interesting read

[john pike]

HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE

Tuesday, February 18, 2014 07:40 AM (Tuesday, February 18, 2014 17:40 UTC)

 

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

 

click on HVO

Edited February 19, 2014 by john pike

[john pike]

Peru: Authorities work on contigency plan in face of increased volcanic activity at Ubinas

Now, Moquegua authorities are creating a contingency plan in order to effectively handle any serious incidents caused by the explosions at Ubinas. The volcano has been spewing ash and gases that include sulfur dioxide, which has reportedly caused people living near Ubinas to experience bothersome gastrointestinal, respiratory, and ocular problems.

 

http://www.peruthisweek.com/news-peru-authorities-work-on-contigency-plan-in-face-of-increased-volcanic-activity-at-ubinas-102306

[john pike]

long valley caldera seismo graph

 

 

had slowed off with these quakes but looks to have started again

 

http://hisz.rsoe.hu/alertmap/site/index.php?pageid=seism_last&rid=387031

 

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

 

lists above

 

maybe nothing but still worth keeping an eye on

[john pike]

volcanic activity worldwide 20 Feb 2014: Kelud, Shiveluch, Poas, Dukono, Tungurahua, Sakurajima, Aso...

Thursday Feb 20, 2014 18:59 PM |

Glow from the active lava dome of Shiveluch this morning (KVERT webcam)

Small ash emission from Aso yesterday

Degassing plume of Kelut yesterday (photo: Aris Yanto)

Small mud eruption at Poás on 14 Feb (Image: OVSICOR-UNA via faceook)

Explosion from Tungurahua yesterday evening

Shiveluch (Kamchatka): Activity at the volcano remains elevated. The lava dome extrudes currently 2 lobes of viscous lava, a larger one on the NW side and a smaller one on the SE side, which seems to have appeared around 16 Feb. The active parts of the dome suffer frequent small to moderate-sized avalanches (mainly from the NW side). Bright glow can be seen at night.

A larger collapse on 18 Feb caused a pyroclastic flow that reached a length of approx. 3 km and an ash plume that rose to 23,000 ft (7 km) altitude.

Chirinkotan (Northern Kuriles): SVERT reported that a thermal anomaly over Chirinkotan was observed in satellite images on 12 and 15 February, and steam-and-gas emissions were observed on 16 February. Cloud cover obscured views on other days during 11-17 February. The Aviation Color Code remained at Yellow.

(from: Smithsonian/USGS Weekly Volcanic Activity Report 12-18 February 2014)

Aso (Kyushu): JMA reported that a very small explosion from Asosan's Nakadake Crater occurred on 16 February and yesterday morning. In both cases, a steam plume with some ash rose 300 m above the crater rim and drifted S. The Alert Level remained at 2 (on a scale of 1-5).

Sakurajima (Kyushu, Japan): Eruptions have been stronger again during the past days. In the 4 days since 16 Feb, at least 6 vulcanian-type explosions were recorded with ash plumes rising up to 12,000 ft (3.7 km) altitude.

Suwanose-jima (Ryukyu Islands): An explosion occurred at the volcano yesterday, VAAC Tokyo reported. The height of the ash plume was unknown.

Kelud (East Java): The volcano itself remains relatively calm and produces only a degassing plume. So far, no clear picture has been available about what exactly is going on at the crater itself (e.g. whether a new lava dome is forming).

The biggest problem at the moment are lahars, mud flows that form when rain water mixes and remobilizes loose deposits. These mud flows can carry boulders of meter size and are extremely destructive (imagine flowing cement with mixed-in large debris of all sorts). It is estimated that approximately 50 million cubic meters of tephra deposits from the 13 Feb eruption could be remobilized by the rains in the coming days, weeks and months to come. Areas most at risk are river valleys and their river banks.

The first lahars have already appeared during the past days, and produced extensive additional damage, but fortunately no fatalities.

A bridge and 2 houses were swept away by lahars from the river Sombong. A mosque and several other houses were also destroyed in the district of Kediri. A person had to be rescued when trapped on an island surrounded by fresh mudflows.

Dukono (Halmahera): New ash plumes were spotted this morning by VAAC Darwin on satellite imagery. Ash clouds at approx. 7,000 ft (2.1 km) altitude drifted 80 nautical miles to the east. Probably strombolian activity seems to be relatively intense at the volcano.

Kilauea (Hawai'i): (19 Feb) 43 earthquakes were strong enough to be located beneath Kilauea Volcano in the past 24 hours - 9 of them were on the south flank faults!

...18 Feb:

The tiltmeter at Pu`u `O`o recorded the start of DI deflation tilt at 9 pm yesterday - around 14.5 hours after the summit DI deflation tilt!

Poas (Costa Rica): A very small phreatic or hydrothermal eruption occurred a week ago. OVSICORI-UNA shared a picture showing a geyser-like ejection of mud from the crater lake. Activity in any case seems to have risen. Karin Leonard who lives at Poas wrote us:

"Poas in Costa Rica is becoming active, there are reports on the local news. We feel lots of tremors and rotten egg gas is more common.

The latest earth quakes are not showing. Often the reports show Nicaragua but should say Costa Rica ...

Karin Leonard, Grecia, Costa Rica

Tungurahua (Ecuador): Overall, the volcano's visible activity has continued to decrease with fewer and weaker explosions, although seismic activity remains moderate to high. The strongest explosion in the past days was one yesterday evening that produced an ash column rising 3 km, a powerful cannon-shot explosion sound. Bombs fell around the crater at distances of 500 m.

[john pike]

Nishino-Shima volcano (Izu Islands, Japan): island has doubled in elevation

Friday Feb 21, 2014 14:38 PM | BY: T

Aerial view of Nishinoshima on 16 Feb 2014 (Japan Coast Guard)

Direction of lava flows from the active vents

Current outline (red) of the island compared to previous stages

The island continues to grow by progressing lava flows into several directions, as the latest images by the Japanese Coast Guard from 16 Feb show. Its highest peak, formed by the western of the 2 active vents, was measured at 66 m, i.e. it now reached almost twice the height of the peak of the old island. The new addition has more than doubled the size of the island so far.

It also formed a black-sand beach on the NE shore of the old part, as a result of lava fragments washed up by currents and waves.

[*]All news about: Nishino-shima volcano

[*]Information about: Nishino-shima volcano

[john pike]

Kelut volcano (East Java, Indonesia): eruption update: possible lava dome forming

Friday Feb 21, 2014 11:53 AM | BY: T

MODIS hot spot at Kelut volcano (ModVolc, Univ. Hawaii)

A MODIS hot spot is visible at the crater, suggesting that a new lava dome could be forming there. This would be the effusive continuation of the recent explosion on 13 Feb, as magma with much less gas content continues to arrive at the vent.

• All news about: Kelud volcano

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

San Miguel volcano news & activity updates

Friday, Feb 21, 2014

San Miguel volcano (El Salvador) activity update

Tremor intensity at San Miguel volcano (MARN)

Current seismic signal at San Miguel volcano (VSM station, MARN)

The situation has remained essentially unchanged and the volcano has (not yet) erupted again. Seismic activity remains high and continues to increase overall, while surface activity consists of pulsating gas emissions reaching a height of 200 m.

Edited February 21, 2014 by john pike

[john pike]

Four people are confirmed dead from a volcanic eruption in Indonesia, with three airports reopening while four others have remained closed, officials say. Mount Kelud, considered one of the most dangerous volcanoes on the main island of Java, spewed red-hot ash and rocks high into the sky late Thursday night just hours after its alert status was raised. "The airport in Malang city in East Java province, and Cilacap and Semarang cities in Central Java province have reopened. There's no problem flying there now. We are now evaluating the status of other airports," Transport Ministry spokesman Bambang Ervan said on Saturday. Seven airports - including those serving international flights in Surabaya, Yogyakarta, Solo and Bandung - were forced to close Friday due to thick ash that blanketed eastern Javanese cities. Ervan said the airports in Bandung and Surabaya are expected to reopen Sunday, while the airport in Solo may reopen Monday and the one in Yogyakarta on February 18. On Friday, villagers in eastern Java described the terror of volcanic materials raining down on their homes, while AFP correspondents at the scene saw residents covered in grey dust fleeing in cars and on motorbikes towards evacuation centres.

 

The volcano spewed grey smoke some 3000 metres into the sky on Saturday, National Disaster Management Agency spokesman Sutopo Purwo Nugroho said, but added that "volcanic activity showed a slowing trend". Transport Ministry director general of aviation Herry Bakti said the authorities "will continue to monitor the movement of ash in the air via satellite". "We were informed by the volcanology agency this morning that no more powerful eruptions are expected. So it is safe to fly and flights can resume. We will issue an update via notice to airmen," he told AFP on Saturday. In an update, Nugroho said the death toll rose from three to four on Saturday, after a 97-year-old woman died from breathing difficulties. He said that 56,089 people are currently living in temporary shelters. The 1731-metre Mount Kelud has claimed more than 15,000 lives since 1500, including around 10,000 deaths in a massive eruption in 1568. It is one of 130 active volcanoes in Indonesia, which sits on the Pacific Ring of Fire, a belt of seismic activity running around the basin of the Pacific Ocean. Earlier this month another volcano, Mount Sinabung on western Sumatra island unleashed an enormous eruption that left at least 16 dead and has been erupting almost daily since September.

 

http://hisz.rsoe.hu/alertmap/site/?pageid=event_update_read&edis_id=VE-20140213-42680-IDN&uid=14694

 

update

[john pike]

Volcanoes Today, 23 Feb 2014: Etna, Fuego, Kelud, Nishino-shima, Dukono, Suwanose-jima, San Miguel, Kilauea

Sunday Feb 23, 2014 19:03 PM |

The lava flows at Etna this evening

Aerial view of Nishinoshima on 16 Feb 2014 (Japan Coast Guard)

Small explosion at Suwanose-jima volcano this morning

MODIS hot spot at Kelut volcano (ModVolc, Univ. Hawaii)

The crater of Kelut on 18 Feb (Photo by Suwarno, a local photographer, via Oystein Lund Andersen)

Explosions at Fuego today (webcam images compiled by Culture Volcan)

Tremor intensity at San Miguel volcano (MARN)

Etna (Sicily, Italy): Activity has remained more or less unchanged. The lava flows from the fissure vents on the eastern flank of the New SE crater continue to be weakly alimented and produce overlapping smaller flows. Most of them only reach only few hundred meters length, and rarely descend into the steeper western wall of Valle del Bove. As a result, most lava accumulates in the less steep area at the foot of the cone.
Weak intermittent strombolian activity continued at the summit vent. Tremor has risen a bit over the past 24 hours, but overall is low.

Nishino-shima (Volcano Islands): (21 Feb) The island continues to grow by progressing lava flows into several directions, as the latest images by the Japanese Coast Guard from 16 Feb show. Its highest peak, formed by the western of the 2 active vents, was measured at 66 m, i.e. it now reached almost twice the height of the peak of the old island. The new addition has more than doubled the size of the island so far.
It also formed a black-sand beach on the NE shore of the old part, as a result of lava fragments washed up by currents and waves.

Suwanose-jima (Ryukyu Islands): Activity has declined a lot over the past weeks. Sporadic smaller explosion still occur from time to time, such as this morning at around 11am (local time):

 

 

Kelud (East Java): (21 Feb) A MODIS hot spot is visible at the crater, suggesting that a new lava dome could be forming there. This would be the effusive continuation of the recent explosion on 13 Feb, as magma with much less gas content continues to arrive at the vent.
...23 Feb:
Activity at the volcano has decreased, but it is still unknown what exactly the situation at the vent is, whether or not a new lava dome is forming there. The thermal hot spot visible on satellite data could also be caused by hot gasses.
A picture showing the new crater at the place of the 2007 lava dome has emerged on our friend Øystein Lund Andersen's website, but of course, it is impossible to see what the bottom of the new pit looks like.

 

Dukono (Halmahera): Elevated strombolian, perhaps weak vulcanian-type activity at the volcano continues to produce frequent ash plumes at approx. 2 km altitude.

Kilauea (Hawai'i): (20 Feb) Summit tiltmeters record inflationary tilt & the lava-lake level rises again to an estimated 35 m (115 ft) below the floor of Halema`uma`u.

Fuego (Guatemala): Strombolian activity remains intense and can now be followed in near-real time on a new webcam. Explosions occur at rates of one every 30 minutes approx. and shower many incandescent material onto the upper slopes, where they generate avalanches up to 2 km length. No lava flows, however, is active at the moment.

San Miguel (El Salvador): (21 Feb) The situation has remained essentially unchanged and the volcano has (not yet) erupted again. Seismic activity remains high and continues to increase overall, while surface activity consists of pulsating gas emissions reaching a height of 200 m.

Edited February 23, 2014 by john pike

[john pike]

What's Going on With the Volcano?

February 18, 2014 - The lava flows on the coastal plain have halted and there is no ocean entry*

 

Currently there are two eruption locations. One in Halema‘uma‘u Crater within Kīlauea Caldera and the other in the very remote middle east rift zone.

 

Please view this December 9, 2013 blog post at http://pacificislandparks.com

 

Halema‘uma‘u Lights the Morning Sky - Photo taken from the overlook by the Volcano House on January 30, 2014 @ 6:25 a.m. - Click for full size image

NPS Photo

The best and closest place to observe a volcanic eruption within Hawai'i Volcanoes National Park at present is from Jaggar Museum overlook, and other vantage points at the summit of KÄ«lauea that provide views of Halema'uma'u Crater.

During daylight, the robust plume of volcanic gas is a constant and dramatic reminder of the molten rock churning in a lava lake beneath the crater floor. After sunset, Halema'uma'u continues to thrill visitors and park staff with a vivid glow that illuminates the clouds and the plume as it billows into the night sky.

The park has increased staffing at Jaggar Museum to assist the many visitors drawn to Halema'uma'u, which has been erupting consistently since the crater became active again in March 2008.

Halemaʻumaʻu web cam (opens in new window).

 

 

 

 

http://www.nps.gov/havo/planyourvisit/lava2.htm.

[john pike]

Tjörnes Fracture Zone volcano

 

 

http://volcanodiscovery.com/tjoernes-fracture-zone-earthquakes.html

 

quite an uptake of earthquakes there today (see link above)

 

whether seismic or magma movement is hard to call at present

 

will update as and when more info comes in

[john pike]

KÄ«lauea volcano eruption update

Update Mon 24 Feb 02:42

The south spatter cone at Pu'u 'O'o erupted lava across the crater floor from about 6 pm yesterday and about 2 am this morning.

 

http://www.volcanodiscovery.com/hawaii/kilauea/current-activity.html

 

 

http://hvo.wr.usgs.gov/cams/panorama.php?cam=KIcam

[john pike]

Volcanic activity worldwide 24 Feb 2014: Fuego, Santa María / Santiaguito, Popocatépetl, Tungurahu...

Monday Feb 24, 2014 18:09 PM |

Glow from an eruption at Suwanose-jima volcano (JMA webcam)

Small explosion at Popocatépetl yesterday (CENAPRED)

Explosion at Fuego volcano this morning

Ash explosion from Tungurahua this morning

Suwanose-jima (Ryukyu Islands): Activity has been higher today. The volcano had several smaller explosions today. Plumes rose to altitudes of approx 2,000 ft (1.8 km).

Kilauea (Hawai'i): (24 Feb) The south spatter cone at Pu'u 'O'o erupted lava across the crater floor from about 6 pm yesterday and about 2 am this morning.

Popocatépetl (Central Mexico): Activity at the volcano has remained unchanged and is currently low. The number of explosive emissions of generally weak size is typically less than 10 per day. SO2 emissions remain elevated and glow at night is visible as a further indicator that magma continues to rise slowly to the crater.

Santa María / Santiaguito (Guatemala): Activity at the volcano remains similar to the previous weeks. Effusion of lava keeps the flows at the eastern and southeastern sides of the Caliente dome active, where avalanches occur. No explosions were reported by the observatory this morning.

Fuego (Guatemala): Strombolian activity remains intense, with ejections often reaching 150-200 m above the crater and producing abundant incandescent avalanches. Thanks to the new webcam, this activity can now be followed much better and in near-real time. This is an example time-lapse showing this morning's activity at the volcano:

 

http://archive.volcanodiscovery.com/webcam/videos/104/video.mp4

 

Tungurahua (Ecuador): Activity remains at moderate to high levels according to the Geophysical Institute (but is considerably lower than earlier this year). Occasional explosions produce ash plumes of approx 1-2 km height and light ash fall was reported from the Pillate sector yesterday.

[karyo]

I am surprised by this article, claiming that the slow down in global warming is at least partly due to the volcanic eruptions we had since the year 2000.

I don't think we had significant enough eruptions to justify that. I was quite excited when the Erithrea volcano erupted a couple of years ago but the eruption eased very quickly after the initial bang!

http://www.theguardian.com/environment/2014/feb/24/volcanic-eruptions-causing-global-warming-slowdown-study-says

Karyo

[john pike]

First documented deep submarine explosive eruptions at the Marsili Seamount (Tyrrhenian Sea, Italy): A case of historical volcanism in the Mediterranean Sea

The Marsili Seamount (MS) is an about 3200 m high volcanic complex measuring 70 Ã— 30 km with the top at ~ 500 m b.s.l. MS is interpreted as the ridge of the 2 Ma old Marsili back-arc basin belonging to the Calabrian Arc–Ionian Sea subduction system (Southern Tyrrhenian Sea, Italy). Previous studies indicate that the MS activity developed between 1 and 0.1 Ma through effusions of lava flows. Here, new stratigraphic, textural, geochemical, and ¹⁴C geochronological data from a 95 cm long gravity core (COR02) recovered at 839 m bsl in the MS central sector are presented. COR02 contains mud and two tephras consisting of 98 to 100 area% of volcanic ash. The thickness of the upper tephra (TEPH01) is 15 cm, and that of the lower tephra (TEPH02) is 60 cm. The tephras have poor to moderate sorting, loose to partly welded levels, and erosive contacts, which imply a short distance source of the pyroclastics. ¹⁴C dating on fossils above and below TEPH01 gives an age of 3 ka BP. Calculations of the sedimentation rates from the mud sediments above and between the tephras suggest that a formation of TEPH02 at 5 ka BP MS ashes has a high-K calcalkaline affinity with 53 wt.% < SiO₂ < 68 wt.%, and their composition overlaps that of the MS lava flows. The trace element pattern is consistent with fractional crystallization from a common, OIB-like basalt. The source area of ashes is the central sector of MS and not a subaerial volcano of the Campanian and/or Aeolian Quaternary volcanic districts. Submarine, explosive eruptions occurred at MS in historical times: this is the first evidence of explosive volcanic activity at a significant (500–800 m bsl) water depth in the Mediterranean Sea. MS is still active, the monitoring and an evaluation of the different types of hazards are highly recommended.

 

Highlights •

Submarine explosive eruptions at the Marsili Seamount in the last 3–5 ka...

•

Marsili is still active, it should be monitored and the hazard evaluated...

•

Coexisting arc and back-arc volcanism in the Tyrrhenian Sea during Holocene...

 

http://www.sciencedirect.com/science/article/pii/S1342937X13003602

 

http://www.volcanodiscovery.com/marsili/news.html

 

 

 

 

 

 

[john pike]

Volcanic activity worldwide 25 Feb 2014: Etna, Marsili Seamount, Pacaya, Kelud, Ibu, Tungurahua, Kilauea

Tuesday Feb 25, 2014 18:30 PM |

Thermal image of the eastern flank of Etna, showing the active lava flows from the NSEC

The crater of Kelut volcano on 23 Feb 2014 (photo: https://twitter.com/RocknRoll_18270)

Etna (Sicily, Italy): Mild strombolian activity from the New SE crater and weekly alimented lava effusion from the fissure vents at its eastern base continue.

Kelud (East Java): An areal photo from 23 Feb shows no signs of a new lava dome, at least not near the surface of the new crater.

Ibu (Halmahera, Indonesia): A thermal anomaly remains visible at the volcano on satellite data, suggesting that there is some sort of ongoing eruptive activity. This could likely be from a slowly growing lava dome.

Kilauea (Hawai'i): (24 Feb) The Kahauale`a 2 lava flow reached 7.8 km (4.8 mi) northeast of Pu`u `O`o by mid-January before stalling. Recent surface flows have been active as small scattered breakouts behind the flow front.

Pacaya (Guatemala): Mild strombolian activity continues at the Mackenney crater. INSIVUMEH reports ejections of fine-grained tephra (ash) to 100-150 m above the crater.

Tungurahua (Ecuador): Activity continues an overall decreasing trend. The volcano has occasional explosions and ash emissions, typically 4-5 per day, which cause light ash fall, mostly in Pillate, Tisaleo and El Manzano to the S and SW. In between such emissions, the volcano is calm. Seismic activity is still significant, but also seems to be decreasing, the latest IGPEN report mentions.

It also writes that the scenario of a return to more elevated activity in the near future (days to weeks) is less likely than a continued trend towards calm.

A significant hazard for the valleys radiating from the volcano remain lahars, as the expected heavy rainfalls in the coming weeks can remobilize the significant amounts of fresh loose deposits and turn onto dangerous mudflows (lahars).

[The PIT]

I am surprised by this article, claiming that the slow down in global warming is at least partly due to the volcanic eruptions we had since the year 2000.I don't think we had significant enough eruptions to justify that. I was quite excited when the Erithrea volcano erupted a couple of years ago but the eruption eased very quickly after the initial bang!http://www.theguardian.com/environment/2014/feb/24/volcanic-eruptions-causing-global-warming-slowdown-study-saysKaryo

I agree I think it's clutching at straws somewhat but we need an expert to have a look at the report and say nonsense.

[Crepuscular Ray]

I agree I think it's clutching at straws somewhat but we need an expert to have a look at the report and say nonsense.

Or, perhaps, keeping an open mind, correct.

Edited February 25, 2014 by Crepuscular Ray

[john pike]

Kamchatka and the Northern Kuriles volcanoes: Erupting or Restless

 

http://www.avo.alaska.edu/activity/avoreport.php?view=kaminfo

[john pike]

The crater of Poas Volcano expelled material 300 meters into the air at noon on Tuesday. The phenomenon, called a phreatic explosion, occurred due to a reaction between magma and water at the southern border of the lake inside the volcano. However, this was not an eruption and the volcano did not spew lava. Instead, a column of steam, gas and other materials formed and spouted out the top of the volcano, confirmed the Volcanological and Seismological Observatory of Costa Rica (OVSICORI). Maria Martinez Cruz, a volcanology and geochemistry expert with OVSICORI, said the event can be considered "normal for the volcano's activity, although explosion heights like the one recorded Tuesday are not that common." This type of explosion, called phreatic, occurs when the volcano's magma contacts water in the crater's lagoon and evaporates quickly through fissures. That action results in an blast of steam, water, ash and small rocks. "The volcano has been calm for several months. It's only releasing a lot of gas. This is part of the natural phenomenon, throwing tall columns of gas into the air, steam, the colors of the volcanic lake," said Juan Dobles, administrator of the Poas Volcano National Park. Currently there is no risk to visitors since most materials dissipate in the wind, Martinez added. Poas Volcano National Park is open from 8 a.m. to 3:30 p.m. every day, and visitors can walk to a lookout point to get a scenic view of the volcano. The Poas Volcano National Park is the second most visited in the country after Manuel Antonio National Park in the Pacific. Martinez, who is part of an expert group currently monitoring the activity at Poas, added that they have been monitoring the volcano closely since an increase in the crater's temperature was detected in recent years. The increase could be an indicator of volcanic activity. Martinez explained that the average temperature of the Poas crater in the last 50 years has been 92 degrees Celsius (198 Fahrenheit), but in 2013 they recorded temperatures between 200-400 degrees Celsius (392-752 degrees Fahrenheit). "Today's explosion reached 720 degrees Celsius (1,328 oF), which is the second highest after those recorded between June-September 2011 when we recorded temperatures up to 890 degrees Celsius (1,634 degrees Fahrenheit)," she said.

 

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=VE-20140226-42817-CRI

[john pike]

Volcanic activity worldwide 26 Feb 2014: Shiveluch, Marapi, Poas, Nyiragongo, Cleveland, Veniaminof,...

Wednesday Feb 26, 2014 18:01 PM |

Glow from Shiveluch's lava dome and steam/ash plume

Phreatic eruption at Poás volcano yesterday (OVSICORI-UNA webcam)

Nyiragongo's lava lake

Shiveluch (Kamchatka): Although no larger explosions or dome collapses have occurred in the past days, the activity at the volcano remains intense and such events could happen any time again. The clear weather today showed the active lava dome still grows on both sides, produces smaller avalanches and an intense steam plume that sometimes contains volcanic ash.

 

 

 

 

Marapi volcano (Sumatra, Indonesia): new ash explosions

: Another ash eruption occurred at the volcano this afternoon at 16:15 local time. According to local news quoting the local VSI volcano observatory spokesman, the eruption today was the largest in a series since the alert status had been raised on 3 August last year. Ash fell in a radius of 3 km where some villages are located.

Also according to the article, the volcano has had a total of 57 recorded eruptions since January 2014. Since all of these have been small, and Indonesia is very used to small volcanic eruptions, they hardly make any news at all (while such an event at other volcanoes would).

The alert status remains unchanged at 2 out of 4.

Kilauea (Hawai'i): (25 Feb) Seismic tremor levels were low w/ dropouts starting 12:30pm yesterday-32 earthquakes recorded earthquakes at Kilauea Volcano the past 24hrs

Veniaminof (Alaska Peninsula, USA): Seismicity at the volcano remains slightly above background. No other unusual activity has been seen recently.

Shishaldin (United States, Aleutian Islands): AVO keeps the alert status at yellow, although no activity has been detected recently.

Cleveland (Aleutian Islands, Alaska): Two small explosions occurred at the volcano yesterday at ~4:17 UTC February 25 (19:17 AKST February 24) and 10:35 UTC (1:35 AKST), the Alaska Volcano Observatory (AVO) reported.

The explosions were detected by infrasound and lightning alarms, and satellite data available several hours after these events confirm that small ash clouds were generated by the explosions. The events were brief, and the estimated altitude of the drifting ash clouds was about 5 km (16,000 ft) asl (AVO).

Poas (Costa Rica): An impressive phreatic eruption took place at the volcano yesterday shortly after noon (local time). So-called cypressoide-type jets of water, mud, and solid blocks were ejected in circular directions from the crater lake to heights of approx. 400 m. The webcam that captured the event was covered with mud.

According OVSICORI-UNA, seismicity has not shown significant changes, although the phreatic explosion left a signal. However, one should keep in mind, that this type of activity can and usually does occur with no warning; the crater area of Poás must currently be regarded as a high-risk zone.

The fumarole at the lake shore is emitting glow at night, indicating high temperature gasses escaping there.

Nyiragongo (DRCongo): After a pause of 2 years, Congo's Virunga National Park opens again this month. The Virunga National Park, founded in 1925, is Africa's oldest and one oldest national park and home to some of the last surviving mountain gorillas, but also two of the world's most interesting and most active volcanoes, Nyiragongo and Nyamuragira.

We all hope that the situation continues to stabilize and we can again offer expeditions to these volcanoes, probably already this summer (planned for July 2014). Stay tuned with us if you're interested in visiting!

[john pike]

Popocatépetl volcano (Mexico): surge in activity destroys existing lava dome and leaves new crater

Thursday Feb 27, 2014 08:20 AM | BY: T

Aerial view of Popocatépetl's summit with the new pit crater (image: CENAPRED)

The volcano's activity increased yesterday. CENAPRED counted no less than 544 small to moderate emissions during the 24 hours between 25-26 Feb.

An overflight with the support of the Navy yesterday afternoon showed that the most recent lava dome (number 48) had been destroyed by this activity. At its place, a new funnel shaped pit, approx 80 m deep was seen. At the bottom of this crater, a new lava dome of 20-30 m diameter already made its appearance.

The elevated activity had been preceded by volcano-tectonic earthquakes of magnitude 2.6 and 1.6 yesterday and the day before. The volcano's alert level remains unchanged at "Yellow phase 2".

 

 

 

 

 

 

 

 

http://www.volcanodiscovery.com/popocatepetl/news/42931/Popocatpetl-volcano-Mexico-surge-in-activity-destroys-existing-lava-dome-and-leaves-new-crater.html

[john pike]

Volcano news: Pacaya (Guatemala) Pacaya volcano (Guatemala): increase of activity, new lava flow

Sunday Mar 02, 2014 17:48 PM | BY: T

Seismic signal from Pacaya today (PCG station, INSIVUMEH)

A new phase of increased activity at the volcano began today. Strombolian explosions became more intense, ejecting incandescent bombs to approx. 200 m above the crater, and since this morning, a new lava flow started to descend from the summit on the western flank. The activity surge is reflected by a strong, gradual increase of tremor.

• All news about: Pacaya volcano
• Information about: Pacaya volcano

 

 

 

http://www.volcanodiscovery.com/pacaya/news/43002/Pacaya-volcano-Guatemala-increase-of-activity-new-lava-flow.html

Edited March 2, 2014 by john pike

[john pike]

Volcanic activity worldwide 2 Mar 2014: Etna, Popocatépetl, Kelud, Tungurahua, Santa María / Santi...

Sunday Mar 02, 2014 11:15 AM |

Lava flows at Enta this morning (Monte Cagliato thermal webcam, INGV Catania)

Part of Kelut's crater area on 25 Feb (image: Pasang Mata)

Aerial view of Popocatépetl's summit with the new pit crater (image: CENAPRED)

The new lava dome, about 20-30 m wide, inside Popocatépetl's crater

Santiaguito's Caliente lava dome yesterday morning

Explosion at Fuego volcano this morning

Tremor intensity at San Miguel volcano (MARN)

Eruption of Tungurahua on 26 Feb and small pyroclastic flows (image: S. Storm OVT/IGEPN)

Etna (Sicily, Italy): No significant changes have occurred at the volcano. Lava continues to flow from the vents at the eastern flank of the New SE crater and produces overlapping flows, typically a few 100 m long, near the rim of and on the upper slope into the Valle del Bove. A small surge in lava effusion occurred during the past hours and can be seen at the end of the following time-lapse

 

Karymsky (Kamchatka): The volcano continues to have strombolian to vulcanian explosions. Some of them are large enough to produce ash plumes visible on satellite imagery, such as one on 28 Feb (ash plume to 7,000 ft reported by VAAC Tokyo).

Kelud (East Java): No new explosions have occurred recently and the alert status of the volcano was lowered to 2 (Waspada, "watch") on a scale of 1-4.

A picture of parts of the crater area, taken from the caldera rim on 25 Feb, appeared on the net and shows what is described as a 15 m wide crater left by the 13 Feb eruption (but this seems rather small).

Dukono (Halmahera): Eruptions at the volcano continue, probably strombolian explosions of increased size. An ash plume was seen on satellite data reaching 12,000 ft (3.6 km) altitude and drifting 55 nautical miles (90 km) to the S (VAAC Darwin).

Kilauea (Hawai'i): (26 Feb) Last night a swarm of very deep earthquakes occurred in the area of Punalu`u on the SW flank of Kilauea in the Ka`u district of the Big Island!

Cleveland (Aleutian Islands, Alaska): No further eruptions occurred since the 2 small explosions on 25 Feb, but similar events are possible at any time.

The remote volcano is not monitored on the ground, which makes it impossible to describe the status of the volcano in detail or make any forecasts.

Popocatépetl (Central Mexico): (27 Feb) The volcano's activity increased yesterday. CENAPRED counted no less than 544 small to moderate emissions during the 24 hours between 25-26 Feb.

An overflight with the support of the Navy yesterday afternoon showed that the most recent lava dome (number 48) had been destroyed by this activity. At its place, a new funnel shaped pit, approx 80 m deep was seen. At the bottom of this crater, a new lava dome of 20-30 m diameter already made its appearance.

...2 Mar:

Current activity at the volcano is low with only occasional small puffs of ash. CENAPRED published an aerial picture showing the new (so far very small) lava dome in the crater.

The agency also reports 50 exhalations during 24 hours, which seems high compared to reported averages of 5-10 per day during recent weeks. However, it appears that the type of events included in these counts has changed and now includes ALL visible emissions of steam, gas or ash, however small.

Santa María / Santiaguito (Guatemala): The activity has remained unchanged, dominated by slow extrusion and avalanches of blocky lava mainly from the SE and NE flanks of the Caliente dome.

The volcano observatory mentions occasional weak to moderate explosions with ash plumes rising up to 500 m from the dome and warns of the possibility of pyroclastic flows (generated by collapse of lava flows).

Pacaya (Guatemala): Mild strombolian eruptions occur at intervals of 5-10 minutes from the Mackenney crater.

Fuego (Guatemala): Activity at the volcano has remained similar to the previous weeks, but decreased somewhat.

Explosions of small to moderate size occur at irregular intervals (approx 1-2 per hour), eject incandescent material to up to 200 m above the crater and cause impressive glowing avalanches on the upper slopes. Shock waves can be felt in several kilometers distance. Ash plumes rise several 100 m and drift 5-10 km before dissipating.

San Miguel (El Salvador): Seismic and degassing activity at the volcano decreased during the past days at bit, but remain elevated. The gas plume reached 100 m above the crater and drifted S-SW yesterday.

MARN continues to record frequent micro-earthquakes concentrated below the northern flank, indicating rock fracturing by internal (possibly magma-related) pressure.

Tungurahua (Ecuador): The volcano had a short burst of activity on 26 Feb, producing a series of moderate explosions and small pyroclastic flows reaching up to 400 m on the northern and northwestern flanks. Ash plumes rose up to 2.5 km above the crater. Since then, the volcano has been mostly quiet and only had minor emissions.

IGPEN reported continuing inflation at the top of the volcano since 15 Feb as well as long-period type earthquakes, which could indicate influx of gasses and magma in this area of the volcanic edifice.