General Volcanic Activity Thread!

[john pike]

Earthquake list: Sunday, 16 September 2012 (176 quakes) and counting still

http://www.volcanodi...012-sep-16.html

quite a few quakes around the 10-11km depth

El Hierro Volcano : Green pre-alert – 185 earthquakes so far today (latest update) – deformations up

http://earthquake-re...ased-to-yellow/

however there was an interesting quake north of La Palma 3.7 and 40km deep

http://hisz.rsoe.hu/...ndex&rid=272739

http://hisz.rsoe.hu/..._map&rid=272739

http://hisz.rsoe.hu/...cano&rid=272739

not sure if this has any bearing but el hierro certainly is stirring

Seismic unrest at El Hierro Island (Canary Islands) in 2011-12: updates

http://www.volcanodiscovery.com/el-hierro/submarine-eruption-2011.html

Edited September 16, 2012 by john pike

[The PIT]

Slightly quieter today only 84 earthequakes up to 17:00 hours. The depth may indicate a new magma injection below the island. Some speculation later today as some quakes got shallower whether the magma is moving towards the service.

[john pike]

Earthquake list: Monday, 17 September 2012 (104 quakes)

http://www.volcanodiscovery.com/el-hierro-volcano-earthquakes/archive/2012-sep-17.html

typical pit it picked up again just after your post

however these are very deep again so hard to say what that means at present

[The PIT]

Now gone all quiet on El Hierro so either someone has half inched the equipment or the swarm is over for now.

[john pike]

One of Indonesia's most active volcanos has erupted, shooting ash and smoke nearly 1 1/2 kilometers (one mile) into the sky. State volcanology official Kristianto says Mount Soputan on central Indonesia's Sulawesi island erupted Tuesday afternoon. Kristianto, who uses one name, says there is no plan for an immediate evacuation since the nearest villages are outside the danger area of about 6.5 kilometers (4 miles) from the crater. Mount Soputan is about 1,350 miles (2,160 kilometers) northeast of Jakarta. It last erupted in July last year, causing no casualties. Indonesia straddles the "Pacific Ring of Fire," an arc of volcanos and fault lines around the Pacific Basin. It has more active volcanoes than any other nation. Another mountain, Gamalama, erupted last week on the Molucca Islands.

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=VE-20120918-36610-IDN

[john pike]

hi pit

things have slowed down today

22 quakes reported

the interesting thing though are the depths

deepest was 18km but there was also a 4km one

http://www.volcanodiscovery.com/el-hierro-volcano-earthquakes/archive/2012-sep-18.html

could magma be getting closer to the surface?

time will tell on this

[john pike]

Volcanic Activity Up in Several Locations

http://www.thejakartaglobe.com/news/volcanic-activity-up-in-several-locations/544995

[john pike]

Alert Levels Rising Along With Smoke and Ash From Marapi

http://www.thejakartaglobe.com/news/alert-levels-rising-along-with-smoke-and-ash-from-marapi/545204

Meanwhile, with a small eruption still taking place on Mount Lokon in Tomohon, North Sulawesi, authorities there are maintaining alert status for the volcano and have banned all human activities within a 2.5-kilometer radius of the crater.

Farid Sukendar, head of the Lokon volcano observation post, said that the mountain erupted after dusk on Saturday, spewing superheated volcanic material up to 600 meters and ash up to 1,500 meters into the atmosphere.

Mount Soputan, in North Sulawesi’s South Minahasa district, and Mount Karangetang in the Sitaro Islands district, across from the northernmost tip of Sulawesi, remained on a government-ordered standby alert status, just one rung below the most severe alert.

The volcanology office also announced on Monday that it had raised the alert level for Mount Gamalama, on Ternate Island in North Maluku province, to standby.

i think its safe to say busy around there at present

[john pike]

gonna post this re iceland

really not sure if this means anything but the area

is having a huge spike in quakes at present

http://en.vedur.is/earthquakes-and-volcanism/earthquakes/atlantic/#view=table

http://www.jonfr.com/volcano/

jon firmans take on this

http://www.floodwarn.co.uk/iceland_katla_volcano.htm

plenty to have a look at on this site

[john pike]

update on iceland

http://hisz.rsoe.hu/alertmap/site/index.php?pageid=seism_volcano&rid=273599

location of volcanoes near swarm

maps

http://en.vedur.is/earthquakes-and-volcanism/earthquakes/atlantic/#view=map

these look like plate movement

but with this area it is very hard to tell at present

a wait and see here

[The PIT]

Although earthquakes have died down at El-Hierro the volcano is still inflating. This is a very long wait and see what happens jobby.

Edited September 30, 2012 by The PIT

[john pike]

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=VE-20121007-36772-IDN

Activty at mount lukon

Indonesia

[BornFromTheVoid]

Thought ye may find this interesting

http://www.esa.int/e...0.html#subhead1

In the central Andes mountains, satellites have detected ground deformation under way above a major subterranean magma body.

The Altiplano–Puna volcanic province is part of an active volcanic arc in South America’s central Andes. Extending through Peru, southwestern Bolivia, Chile and northwestern Argentina, it is home to a number of large calderas formed following catastrophic eruptions.

Beneath the surface of Altiplano–Puna, about 17–19 km deep, lies the largest known active magma body in Earth’s continental crust.

Satellites show that the ground in this area has been rising by about 10 mm per year over the past 20 years.

In a study published today in Science, scientists used radar data from the ERS and Envisat missions to study an unusual uplift near the Uturuncu volcano, which had been dormant for 270 000 years.

The surrounding area, however, is sinking at a slower rate of about 2 mm per year. With the wide-brimmed hat-like shape this creates, the study team has nicknamed this the ‘sombrero uplift’.

[john pike]

scription

Hundreds of local residents have been forced to evacuate as hot ashes spewed by Mount Rokatenda in Pulue Island, Sikka, East Nusa Tenggara on Thursday. "Volcanic ashes have reached four villages: Nitunglea, Rokirole, Kesokoja and Lidi. Our team has distributed masks and medicine for the residents," Sikka disaster management agency head Silvanus Tibo said on Friday. Rokatenda's volcanic activities have increased since Oct. 1, records show that there have been more than 50 volcanic earthquakes and 15 local tectonic earthquakes coupled with flames. The volcano’s last eruption was on March 23, 1985, with volcanic ashes reaching two kilometers above the mountain’s peak. Rokatenda also erupted during the period of Aug. 4 to Sept.25 1928. Nearly 6,000 people are currently living in four villages surrounding Mount Rokatenda

[john pike]

Description

The highest active volcano in Eurasia, Klyuchevskaya Sopka has started to erupt, officials with the Institute of Volcanology and Seismology said. On the night of October 15, there was light seen over the summit of the volcano indicating a blowout of lava in its crater, Vesti.ru reports. Experts believe the release of ash to the height of 6 feet above sea level may start any moment. Lava flows on the slopes of the volcano are also expected. Yellow aviation color code has been assigned to the volcano to warn about the potential danger that the volcanic ash and gases may pose to aircraft engines. Nothing has been said about the possible threat to human settlements. The nearest settlement is 30 kilometers far from Klyuchevskaya Sopka. The last eruption of Klyuchevskaya Sopka took place from September 2009 to December 2010. In June this year, the giant began to wake up again.

RSOE

[john pike]

http://earthquake.usgs.gov/earthquakes/recenteqsww/Maps/10/160_50_eqs.php

Eartquakes near the volcano as shown in post above

[john pike]

http://hisz.rsoe.hu/alertmap/read/index.php?pageid=svolcano_index&svid=11

Some large quakes today near volcano close to japan

See link for details

[john pike]

http://mobile.volcanodiscovery.com/popocatepetl/news/19831/Popocatepetl-volcano-Central-Mexico-activity-update-frequent-small-explosions-with-ash-up-to-15-km-a.html

[john pike]

http://mobile.volcanodiscovery.com/view_news/19881/Volcanic-activity-world-wide-16-17-October-2012-Fukutoku-Okanoba-Popocatepetl-Fuego-Santiaguito-Hear.html

See link for latest volcano news

[john pike]

RSOE EDIS

Event Report

Saturday, 20th October 2012 :: 20:06:39 UTC

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Volcano Activity in Indonesia on Saturday, 20 October, 2012 at 17:44 (05:44 PM) UTC.

Description

Indonesia issued today an official alert at the straight of Sunda for the increasing activity of Mt. Anak Krakatoa. Dense clouds surrounding the mountain blind it from human eyes while fishers and tourists must remain at a distance of two kilometres, said Andi Suardi, head of the watch deport in Hargopancuran. Just 30 days earlier, Anak Krakatoa spewed lava and other material 2,000 meters high above the peak; there have been since hundreds of quakes in the area and black clouds continue to veil the mouth of the mountain. Situated between Sumatra and Java Islands, Anak Krakatoa emerged from sea late in the 1930s and from 1950, growing an average of five meters per year. Science has confirmed another five active volcanos and the authorities have activated the alert in their vicinity, and Indonesia has more than 400 volcanos and some 130 remain active.

http://hisz.rsoe.hu/alertmap/site/?pageid=event_summary&edis_id=VA-20121020-36898-IDN

[john pike]

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=VA-20121025-36946-HMD

Volcano Activity in Heard Island and McDonald Islands on Thursday, 25 October, 2012 at 03:12 (03:12 AM) UTC.

Description

One of Australia's two active volcanoes seems to be erupting. We say seems because the volcano in question, on Heard Island, is located in the southern reaches of the Indian Ocean, 2000km north of Antarctica and closer to Africa than to Australia. That's about as close to the middle of nowhere as it is possible to be. Heard Island and its neighbour MacDonald Island are Australian territories and are uninhabited, but each possesses an active volcano. Scientific expeditions venture there infrequently, due to conservation issues and the fact the islands have a wretched climate, are thousands of miles from anywhere nice and can only be accessed or supplied by ship. That means little attention is paid to the islands, with the satellite images such as the one below seldom acquired. But NASA's Earth Observatory says the image and other analysis detected heat signatures on Heard Island's 2475m Mawson Peak that suggest recent volcanic activity. “Although not definitive, this natural-color satellite image also suggests an ongoing eruption,†NASA writes. “The dark summit crater (much darker than Mawson’s shaded southwestern face) is at least partially snow-free, and there’s a faint hint of an even darker area—perhaps a lava flow—within. Shortwave infrared data (collected along with the visible imagery) shows hot surfaces within the crater, indicating the presence of lava in, or just beneath, the crater.†The Australian Government's official Heard and McDonald Island website, which has a nifty .aq domain, reports eruptions on McDonald Island. In 1992. Heard Island's remote location means any eruptions are unlikely to bother anyone, as the region has no history of colossal, world-shaking, events. Penguins and expeditions that plan to visit the islands are, however, in jeopardy. Two of the latter are scheduled for the near future. In 2013 a solo adventurer plans to sail to the islands and then kayak ashore.

[john pike]

Unusual geological event in USA on Friday, 26 October, 2012 at 03:19 (03:19 AM) UTC.

Description

Earthquake swarms and a region-wide rotten egg smell recently reminded Southern California residents they live next to an active volcano field, tiny though it may be. At the time, scientists said the phenomena did not reflect changes in the magma chamber below the Salton Sea. But now, researchers may need to revise estimates of the potential hazard posed by the Salton Buttes - five volcanoes at the lake's southern tip. The buttes last erupted between 940 and 0 B.C., not 30,000 years ago, as previously thought, a new study detailed online Oct. 15 in the journal Geology reports. The new age - which makes these some of California's youngest volcanoes - pushes the volcanic quintuplets into active status. The California Volcano Observatory, launched in February by the U.S. Geological Survey (USGS), already lists the area as a high threat for future blasts. "The USGS is starting to monitor all potentially active volcanoes in California, which includes the Salton Buttes," said study author Axel Schmitt, a geochronologist at the University of California, Los Angeles. "With our results, I think this will further enhance the need to look into the system," Schmitt told OurAmazingPlanet. Schmitt and his colleagues dated zircon crystals in the hardened lava of the buttes with a relatively new technique, a "helium clock" that starts ticking once the minerals begin cooling at the surface.

The National Science Foundation's EarthScope project funds an extensive seismic imaging project in the Salton Sea that may soon reveal more information about what's happening deep underground. "We'll be looking with great interest to see what we can tell from the Salton Seismic Imaging Project," said Joann Stock, a Caltech professor and an expert on the region's volcanic hazards who was not involved in the new study. "I think (Schmitt's study) is a great contribution," she said. "It's an area where we should be concerned. We know that there's a lot of hot stuff down there," she told OurAmazingPlanet. In August, an earthquake swarm shook the nearby town of Brawley. The USGS attributed the temblors to faults in the Brawley Seismic Zone. In September, a sulfurous stench emanated from the Salton Sea and wafted across the Inland Empire. The odor was tentatively linked to a fish die-off, but could also have been caused by volcanic gases, Stock said.

RSOE shall not be liable for any customer claims based on the content and services distributed by RSOE. RSOE states that the EDIS content means information collected from the related and approved sources and therefore RSOE shall not be responsible for the content of these information.

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=UGE-20121026-36957-USA

[john pike]

New Zealand authorities are urging climbers and hikers to stay away from the summit of Mt Ruapehu after warnings the volcano could erupt. A summit hazard zone - the area within two kilometres of the centre of Crater Lake - should be avoided, the Department of Conservation's Ruapehu area manager Jonathon Maxwell said on Friday. The warning did not affect nearby Mt Tongariro or the popular Tongariro Alpine Crossing, but people should be aware of an increased possibility of lahars (mudflows containing volcanic matter) in streams on the Round the Ruapehu Mountain track. On Friday morning, GNS Science said pressure was building under Mt Ruapehu and there was an increased chance it will erupt. The aviation alert level around the central North Island has been raised to yellow - suggesting unrest above background levels - but the volcanic alert level remains unchanged at "signs of unrest". GNS Science volcanologist Steven Sherburn says the changes make scientists believe eruptions are more likely in the coming weeks to months. "We are monitoring Ruapehu closely, but it often does not give any immediate warning that it is going to erupt," he said. "We think that the temperature a few hundred metres beneath Crater Lake is about 800C, but the lake itself is only about 20C. "This suggests the vent is partly blocked which may be leading to a pressure build-up beneath Crater Lake. "A sudden release of the pressure may lead to an eruption." Since late October small earthquakes have recorded about five kilometres beneath Ruapehu's summit, but they may not be directly related to the high temperatures beneath Crater Lake.

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=VA-20121116-37213-NZL

info

http://www.volcano.si.edu/world/volcano.cfm?vnum=0401-10%3D

[john pike]

Volcanic ash is reportedly spurting out of Mount Rokatenda, in Sikka regency, Indonesia due to increased volcanic activity since October 1, 2012. Based on analysis of satellite imagery and other data, the Darwin VAAC reported that during 11-13 November ash plumes from Paluweh rose to an altitude of 2.4 km (8,000 ft) and drifted 90-150 km NW and W. People living around the volcano have been evacuated and shelters are provided at Hewuli village. Jakarta post reports that there have been cases of various illnesses, such as respiratory, eye and skin irritation. Also known as Paluweh, Rokatenda is a stratovolcano mountain located on the small island of Palu’e Island, north of Flores Island in Sikka Regency in the province of East Nusa Tenggara, Indonesia. The biggest eruption occurred on 4 August – 25 September 1928, when a strong explosive eruption was accompanied by landslide-induced tsunamis and lava dome emplacement.

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=VA-20121119-37241-IDN

[john pike]

Tongariro is a complex of multiple volcanic cones constructed over a period of 275,000 years. The active vents include Te MÄri, Emerald, North Crater and Red Crater. There have been five reported eruptions from the Te MÄri craters between 1855 and 1897 but they have been dormant until 2012

http://www.geonet.org.nz/volcano/info/tongariro

alert level 2