Volcanic activity world-wide 11 November 2012 [1]

Source: VolcanoDiscovery.com [2] - by T, 11/11/12

Cleveland Volcano

A new explosion occurred earlier today at Cleveland volcano [3] in the Aleutian Islands. A small ash cloud was detected on satellite images. AVO raised the Aviation Color Code to orange.

Lokon volcano [4] 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 [5] 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 [6] 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 [7] has been showing increased CO2 emissions, but otherwise no significant changes in the ongoing weak volcanic unrest.

Popocatépetl [8] 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 [9] 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 [10] 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 [11] in the Northern Kuriles, Russia.

MODIS satellite data continues also to show a hotspot at Heard Island volcano [12].