Roundup of Global Volcanic Activity:
Jebel Zubair volcano (Red Sea, Yemen) activity update
As of yesterday morning when the latest MODIS satellite image was taken from the area, the eruption continued with little changes.
Lewotobi volcano (Flores, Indonesia): increased seismic activity, alert level raised
Following an increase in seismic activity recorded since 28 September, VSI raised the alert level to 2 ("Waspada","watch") on a scale of 1-4. No changes in surface activity, degassing from fumarole vents, has been noted.
Tjörnes Fracture Zone (North of Iceland): An intense earthquake swarm has been going on offshore North Iceland, 10 km NW of Gjögurtá, since 25 September. This morning, 2 earthquakes reaching magnitude 3 and 3.2 occurred at 06:14 and 07:41. In total, more than 1000 quakes have been recorded by IMO.
The depths of the quakes vary from about 15 km depth (crust-mantle boundary) to near surface. The area is located on an active fault line related to rifting, and a possible cause of the earthquake swarm could be a magmatic intrusion.
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