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Volcanic activity world-wide 11 November 2012: Cleveland, Lokon, Tjörnes Fracture Zone, Mayon,Taal, Popocatépetl, Fuego, Santiaguito, Alaid, Heard Island

Sunday Nov 11, 2012 09:58 AM | BY: T

update:
New explosions occurred earlier today from Paluweh (Rokatenda) volcano in Flores, Indonesia. An ash plume was observed at 09:30 GMT reaching 8,000 ft (2.4 km) altitude and extending 80 nm (about 140 km) to the NW.

A new explosion occurred earlier today at Cleveland volcano in the Aleutian Islands. A small ash cloud was detected on satellite images. AVO raised the Aviation Color Code to orange.

Lokon volcano in North Sulawesi produced another small explosion today at 13:47 local time. Residents heard a loud bang and observed ash coming out from the crater. Ash was not seen on satellite data.

The seismic swarm in the Tjörnes Fracture Zone north off Iceland regained some strength the past days. The seismic swarm has now been ongoing for almost 3 weeks.

After being unusually quiet, two of the volcanoes in the Philippines seem to become more restless:
Mayon volcano has started to show some signs of renewed activity. PHILVOLS has detected a slightly elevated number of quakes and weak inflation of parts of the volcanic edifice. The volcano is producing a gas and steam plume. It is not expected to erupt in the near future, but PHILVOLCS recommends a safety distance of 6 km due to the risk of sudeen phreatic explosions and lahars.

Taal volcano has been showing increased CO2 emissions, but otherwise no significant changes in the ongoing weak volcanic unrest.

Popocatépetl in Mexico had more than 120 emissions of steam and sometimes small amounts of ash during 9-10 November, in other words more than 3 times what has been reported for most of the previous days. It is unclear whether this is due to better observation circumstances (clearer weather etc.) or reflects a true increase of activity.

During 9-10 Nov, Fuego volcano was unusually quiet with only 3 weak explosions. The latest INSIVUMEH report also mentions the length of the lava flow at only 200 m, which would suggest that effusion rate has dropped a lot (temporarily).

During the past days, also Santiaguito seems to have been calm compared to previous periods. INSIVUMEH reports steaming and a few weak explosions, but states the dome was "calm".

A strong thermal anomaly remains visible at Alaid volcano in the Northern Kuriles, Russia.

MODIS satellite data continues also to show a hotspot at Heard Island volcano.
Previous news
Saturday, Nov 10, 2012
An explosion occurred from Karymski volcano in Kamchatka at 22h15 on 9 Nov GMT), producing an ash plume rising to 18,000 ft (5 km) altitude and quickly drifting south (Tokyo VAAC). 4 hours later, the ash had dissipated. ... [more]
Friday, Nov 09, 2012
A larger explosion with an ash plume rising 6-7 km from Raung volcano in East Java was reported on 8 Nov, but it seems that the report, based on a pilot observation was actually false. ... [more]
Wednesday, Nov 07, 2012
Strombolian activity has been observed at Raung volcano in East Java during a visit by two of our local expedition organizers in Indonesia. ... [more]
Monday, Nov 05, 2012
The seismic swarm in the Tjörnes Fracture Zone north off Iceland continues with little changes. About 50-100 earthquakes mostly of magnitudes of around 1-2 are being recorded daily. The largest recent one was a felt magnitude 3.8 quake at 5.6 km depth on Saturday 3 Nov. ... [more]
Friday, Nov 02, 2012
An increased number of earthquakes can be noted beneath Askja volcano in Iceland during the recent days, and the tremor signal is elevated as well, although far from alarming levels. The volcano is certainly one to watch out for. ... [more]

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