General Volcanic Activity Thread!

[yamkin]

MASSIVE EXPLOSION during eruption @ Sakurajima Volcano , Japan 28/08/2011

http://www.youtube.com/watch?v=eM4gFkr0cnU&feature=player_embedded

Edited August 29, 2011 by yamkin

[The PIT]

Looks like Etna has erupted again over the weekend certainly a hot spot on the cams and there was a pike in seismic activity as well. Can't find any reports though.

Ah here we go http://www.flickr.com/photos/etnaboris/6092672024

Edited August 29, 2011 by The PIT

[yamkin]

Looks like Etna has erupted again over the weekend certainly a hot spot on the cams and there was a pike in seismic activity as well. Can't find any reports though.

Ah here we go http://www.flickr.co...oris/6092672024

The PIT, Simply amazing pics in your link. More info is starting to filter through http://www.washingto...obnJ_story.html

Edited August 29, 2011 by yamkin

[john pike]

Indonesia: Mount Lokon activity declines as Marapi spews out white cloud

http://www.daijiworld.com/news/news_disp.asp?n_id=113965

Ash thrown kilometres into the sky by an increasingly active volcano in a remote Russian Pacific coast territory has forced a reroute of international air traffic, government officials said Monday

After several decades of relative dormancy the volcano started showing signs of growing activity in 2006. Shiveluch's increasing ash emissions are a sign of rising pressure. However, it is impossible to predict when the volcano might erupt, RNES spokesmen have said. Containing more than 150 volcanoes, Russia's Kamchatka peninsula is one of the world's most active seismic zones.

Continent: Asia

Country: Russia [Asia]

County / State: Kamchatka Peninsula (Far-East)

Area: Volcano Shiveluch

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=VE-20110829-32139-RUS

[The PIT]

Okay time to get nervous. With some having a crappy summer this year next year could be a year without a summer as Tambora twitches. However this volcano has erupted three times since 1812 and they all been small.

[karyo]

Okay time to get nervous. With some having a crappy summer this year next year could be a year without a summer as Tambora twitches. However this volcano has erupted three times since 1812 and they all been small.

Do you think Tambora is likely to erupt?

Karyo

[coldfingers]

Hmmmmm, 2 quakes in 3 seconds in Katla volcano in Iceland and one in the nearby Tindfjallajokull volcano. A large 3.2 one in Katla and only 2.9km deep. Interesting, she hasn't gone back to sleep just yet.

[Paranoid]

I just noticed that 3.2M event as well, apparently there was a brief spike of harmonic tremor at Katla yesterday as well.

[michail]

Hmmmmm, 2 quakes in 3 seconds in Katla volcano in Iceland and one in the nearby Tindfjallajokull volcano. A large 3.2 one in Katla and only 2.9km deep. Interesting, she hasn't gone back to sleep just yet.

Beat me to it! tremors increasing too. something stirring?

http://hraun.vedur.is/ja/oroi/esk.gif

[coldfingers]

Beat me to it! tremors increasing too. something stirring?

http://hraun.vedur.is/ja/oroi/esk.gif

And yet another small quake of only 1.1 but very close to the 3.2. Definitely does look like something stirring. Bound to happen now as I am away with no internet access for 4 days next week!

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

Edited September 1, 2011 by coldfingers

[Argyllcraig]

Myrdalsjokull is a funny area at this time of year (normal to be active in the summer) for quakes and trying to tell whether they are to do with the likes of Katla or whether they are likely to be weather or glacial induced.

Many of the tremors in the last few weeks are highly likely to have been due to movement in the glacier and with the spell of bad weather in the area which often shows up on the seismometers.

The 3.2 this evening however does appear at first glance to be an indicator of magma movement (this can be assumed due to its depth) and may be some form of intrusion within the Katla system..., As Jon on is blog will often point out, this in itself is nothing unusual but then again could be the start of something.

[Paranoid]

Indeed, Katla's had numerous bouts of activity this year followed by periods of quiescence. I suppose they can only be interpreted as individual events in a long term pattern, rather than any one event being indicative of an impending eruption.

[john pike]

Tambora volcano in Indonesia has been raised to level 2 alert (out of maximum 4) after an increase in volcanic earthquakes. In April 2011 there were 37 shallow volcanic earthquakes recorded, 167 in May, 277 in June, 363 in July, and 141 from 1-29 August. Continuous tremor was recorded on 29 and 30 August. Tourists and locals are advised to avoid the summit area of Tambora volcano. In 1815 Tambora had one of the largest eruptions on earth in the past 1000 years and ejected 100-150 cubic km of lava.

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=VA-20110901-32174-IDN

Volcanic unrest has been reported at Ranakah volcano in Indonesia. Between January and 24th August 2011 there was a background level of 1-2 shallow volcanic earthquakes per day at the volcano. On 24th August 2011 there were 10 shallow volcanic earthquakes recorded and 6 on 25th August. There is a risk that volcanic earthquakes could distrupt the lava dome causing pyroclastic flows similar to 1988. On 26th August 2011 the alert status was raised to level 2 (out of a maximum 4). People are advised to avoid the summit area.

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=VA-20110901-32175-IDN

http://hisz.rsoe.hu/alertmap/index2.php

[john pike]

Iceland's massive Katla volcano is showing increasing signs of a possible eruption following an intense week of earthquakes and tremors

http://www.clickgreen.org.uk/news/international-news/122493-quake-hit-iceland-volcano-katla-shows-strengthening-signs-of-eruption.html

not sure how reliable this info is

[coldfingers]

Iceland's massive Katla volcano is showing increasing signs of a possible eruption following an intense week of earthquakes and tremors

http://www.clickgree...f-eruption.html

not sure how reliable this info is

Yes an interesting article. However it appears that when they say "getting close to an eruption" that could mean anything from weeks to years. So as aways it is a case of wait and see. Interesting times in Iceland though.

As regards the summer 'ice quakes' these definitely do muddy the waters a little, however I tend to look at the depth of the quakes. In my view even relatively large quakes can be suspect for being just 'ice quakes' if they are very shallow depth. Best look for deeper quakes for indications things are stirring and there have been plenty this summer in the Katla area, strangely not all in the caldera area.

Edit:- Just looked at Jon Frimans Iceland volcano blog....... http://www.jonfr.com/volcano/

He reckons that Katla is begining to show signs of inflation, if this continues it would show the quakes have been signs of the volcano begining to fill. Worth keeping an eye on his blog for the next few weeks/months I reckon.

Edited September 3, 2011 by coldfingers

[Argyllcraig]

He reckons that Katla is begining to show signs of inflation, if this continues it would show the quakes have been signs of the volcano begining to fill. Worth keeping an eye on his blog for the next few weeks/months I reckon.

Totally agree, Jon's blog is well worth keeping an eye on not only for direct content which he translates for us but also because he has his own equipment in Iceland too which provides first hand data and insights.

[coldfingers]

A further small quake swarm at Katla today. 5 small quakes all within 6 minutes of each other with magnitude between 0.0 and 2.7 but only one was deeper than 1.1km. The 0.0 at 1.1km I would definitely tend to dismiss as an ice quake, the one at 9.6km depth is more interesting although not the largest.

Something definitely seems to be moving there but how significant it is we will have to wait to see.

OOPS sorry I forgot the link to the earthquake map.

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

Edited September 3, 2011 by coldfingers

[john pike]

Increased activity at 22 volcanoes, alert raised

Adianto P. Simamora, The Jakarta Post, Jakarta | Sat, 09/03/2011 8:00 AM

The government has requested that local administrations remain on the alert for severe risks of volcanic eruptions, as the number of volcanoes showing abnormal activity continued to raise.

http://www.thejakartapost.com/news/2011/09/03/increased-activity-22-volcanoes-alert-raised.html

lets hope this does not happen

[john pike]

from earthquake thread

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

Date Time Latitude Longitude Depth Magnitude Quality Location

Saturday

03.09.2011 18:04:05 63.646 -19.078 4.3 km -0.5 43.96 7.4 km N of Hábunga

Saturday

03.09.2011 17:49:05 63.643 -19.087 1.1 km 2.2 90.03 7.0 km N of Hábunga

Saturday

03.09.2011 17:13:48 63.640 -19.078 1.1 km 0.5 90.01 6.8 km N of Hábunga

Saturday

03.09.2011 16:51:37 63.640 -19.074 0.1 km 2.2 99.0 6.8 km N of Hábunga

Saturday

03.09.2011 16:50:01 63.639 -19.068 1.1 km 2.7 90.07 6.7 km NNE of Hábunga

Saturday

03.09.2011 16:48:16 63.637 -19.065 13.3 km 1.6 99.0 6.6 km NNE of Hábunga

Saturday

03.09.2011 16:47:47 63.577 -19.143 9.6 km 0.7 35.92 2.2 km W of Hábunga

Saturday

03.09.2011 16:45:10 63.627 -19.050 1.1 km 0.0 44.01 5.8 km NNE of Hábunga

Saturday

03.09.2011 15:00:53 63.639 -19.242 1.0 km 0.3 99.0 0.4 km ESE of Goðabunga

could we be seeing a swarm building at katla

Earthquake swarm in Katla volcano

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

[john pike]

Saturday

03.09.2011 19:30:18 63.929 -21.986 5.1 km 2.6 90.06 6.0 km NE of Krýsuvík

another quake near katla

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

[Love Snow]

What kind of Eruption would occur if Katla did decide to blow? and would it have an effect on the Climate air travel ?

[john pike]

from earthquake thread

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

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

Tuesday

06.09.2011 07:26:11 66.420 -17.553 10.1 km 1.3 90.01 24.3 km ESE of Grímsey

Tuesday

06.09.2011 04:12:25 63.609 -19.122 1.1 km 2.6 90.07 3.4 km NNW of Hábunga

Tuesday

06.09.2011 04:11:14 63.686 -19.451 1.1 km 2.6 90.03 1.8 km ENE of Básar

Tuesday

06.09.2011 04:11:12 63.609 -19.119 1.1 km 2.2 90.08 3.4 km NNW of Hábunga

still some activity in iceland near katla

see links for full list

[yamkin]

What kind of Eruption would occur if Katla did decide to blow? and would it have an effect on the Climate air travel ?

Love Snow, The following was published back in 2010.

Iceland’s Volcanic Activity Can Have Global Consequences http://www.popfi.com/2010/03/23/icelands-volcanic-activity-can-have-global-consequences/

[Staffordshire]

Getting a bit worried about katla, just imagine the distruption it would cause!!! :S

[yamkin]

Getting a bit worried about katla, just imagine the distruption it would cause!!! :S

I agree. An Iceland scientist does not understand why the European governments are not warning the public.