Another Aleutian volcano erupts
Jun 10, 2013 19:24:49 GMT -5
Post by popcorn on Jun 10, 2013 19:24:49 GMT -5
Another Aleutian volcano erupts - Increasing seismic tremor and steam plume at Veniaminof volcano 
AVO reported on June 8, 2013 that over the past two days, they have detected gradually increasing seismic tremor beneath Veniaminof volcano, Alaska. Similar seismic activity has been associated with ash emissions at Veniaminof in the past, most recently in 2005.
On June 9, 2013 AVO stated that the seismic tremor continues at the volcano, and clear web camera views showed a steam plume over the past 24 hours, though it is difficult to see in daytime views. AVO therefore raised the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory.
Massive Veniaminof volcano, one of the highest and largest volcanoes on the Alaska Peninsula, is truncated by a steep-walled, 8 x 11 km, glacier-filled caldera that formed around 3700 years ago. The caldera rim is up to 520 m high on the north, is deeply notched on the west by Cone Glacier, and is covered by an ice sheet on the south. Post-caldera vents are located along a NW-SE zone bisecting the caldera that extends 55 km from near the Bering Sea coast, across the caldera, and down the Pacific flank. Historical eruptions probably all originated from the westernmost and most prominent of two intra-caldera cones, which reaches an elevation of 2156 m and rises about 300 m above the surrounding icefield. The other cone is larger, and has a summit crater or caldera that may reach 2.5 km in diameter, but is more subdued and barely rises above the glacier surface.
read more:
thewatchers.adorraeli.com/2013/06/10/another-aleutian-volcano-erupts-increasing-seismic-tremor-and-steam-plume-at-veniaminof-volcano/
AVO reported on June 8, 2013 that over the past two days, they have detected gradually increasing seismic tremor beneath Veniaminof volcano, Alaska. Similar seismic activity has been associated with ash emissions at Veniaminof in the past, most recently in 2005.
On June 9, 2013 AVO stated that the seismic tremor continues at the volcano, and clear web camera views showed a steam plume over the past 24 hours, though it is difficult to see in daytime views. AVO therefore raised the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory.
Massive Veniaminof volcano, one of the highest and largest volcanoes on the Alaska Peninsula, is truncated by a steep-walled, 8 x 11 km, glacier-filled caldera that formed around 3700 years ago. The caldera rim is up to 520 m high on the north, is deeply notched on the west by Cone Glacier, and is covered by an ice sheet on the south. Post-caldera vents are located along a NW-SE zone bisecting the caldera that extends 55 km from near the Bering Sea coast, across the caldera, and down the Pacific flank. Historical eruptions probably all originated from the westernmost and most prominent of two intra-caldera cones, which reaches an elevation of 2156 m and rises about 300 m above the surrounding icefield. The other cone is larger, and has a summit crater or caldera that may reach 2.5 km in diameter, but is more subdued and barely rises above the glacier surface.
read more:
thewatchers.adorraeli.com/2013/06/10/another-aleutian-volcano-erupts-increasing-seismic-tremor-and-steam-plume-at-veniaminof-volcano/