seismicity

We had a brief bit over the weekend that Mayon in the Philippines had a number of small explosive events (less the one minute worth of activity). However, Philvolcs (Philippine Institute of Volcanology and Seismology) is downplaying the idea that a major eruption is in the works. There have been a number of explosion-related seismic events and harmonic tremors, along with 12 mm of inflation on one side of the volcano (although over what time period the inflation occurred is not mentioned in the article). It appears that the Philvolcs scientists just think that magma is moving under the…
The folks up in Alaska have a lot to watch these days in the Aleutians, with three volcanoes erupting right now. Just a quick update on the current activity:   Kasatochi: The eruption that started Thursday and produced 45,000 foot ash columns has quieted by Saturday, but there are still moderate (M=5) earthquakes being recorded near the island (above, before eruption). Okmok: Ash from the month-long eruption is falling on islands near the caldera. Cleveland: Activity at Cleveland has quieted to the point that no ash column was spotted on Saturday.
Finally, in a very slow week for volcano news, we find a report from the Alaska Volcano Observatory about concerns of another eruption in the state. Currently, both Okmok and Cleveland are erupting, and now AVO has issued a warning about Kasatochi Volcano on the island of the same name (~100 kilometers east of Adak, roughly near 175W on the map above). The volcano is the island - more or less - and any people on the small island are being evacuated due to increased seismic activity underneath the volcano/island. Not much is known about the eruptive activity at Kasatochi. The volcano does…
Admittedly, this is only a brief report, but there are indications that Tungurahua in Ecuador might be heading into a new period of heightened activity. Over the last week or so, there has been increased seismicity, reports of "booming noises" and increased ash emissions from the volcano. Being one of the more active volcanoes in the Andes, it would be surprising if the new eruptions were very big, but instead we might expect more frequent moderate ash and pyroclastic eruptions. However, with this little information, it is hard to tell what might happen and I'll keep my eyes peeled for more…