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YELLOWSTONE VOLCANO OBSERVATORY MONTHLY UPDATE
Thursday, September 1, 2011 3:20 PM MDT (Thursday, September 1, 2011 21:20 UTC)
YELLOWSTONE VOLCANO (CAVW #1205-01-)
44°25'48" N 110°40'12" W, Summit Elevation 9203 ft (2805 m)
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN
During the month of August 2011, 25 earthquakes were located in the Yellowstone National Park region. The largest was a magnitude 2.0 event on August 10 at 10:46 AM MDT, located about 18 miles northeast of Fishing Bridge, WY. No swarms were recorded in August.
Earthquake activity continues at relatively low background levels.
Ground Deformation Summary: A strong seasonal signal, probably related to last winter's extraordinary (~200% of normal) snowfall, is apparent on many of the GPS records in and well outside Yellowstone. This signal complicates interpretation of the GPS data, but detailed analysis indicates that caldera subsidence, which began about 1.5 years ago, likely persists. YVO scientists are working to understand the nature of the unusual signal, and will continue to monitor it carefully.
A strong seasonal signal, probably related to last winter's extraordinary (~200% of normal) snowfall, is apparent on many of the GPS records in and well outside Yellowstone.
YELLOWSTONE VOLCANO OBSERVATORY MONTHLY UPDATE
Monday, October 3, 2011 10:54 AM MDT (Monday, October 3, 2011 16:54 UTC)
YELLOWSTONE VOLCANO (CAVW #1205-01-)
44°25'48" N 110°40'12" W, Summit Elevation 9203 ft (2805 m)
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN
During the month of September 2011, 45 earthquakes were located in the Yellowstone National Park region. The largest was a magnitude 2.5 event on September 5 at 12:59 PM MDT, located about 8 miles west northwest of West Yellowstone, MT. No swarms were recorded in September.
Earthquake activity continues at relatively low background levels.
Ground Deformation Summary: A strong seasonal signal, probably related to last winter's extraordinary (~200% of normal) snowfall, is apparent on many of the GPS records in and well outside Yellowstone. This signal complicates interpretation of the GPS data, but detailed analysis indicates that caldera subsidence, which began about 1.5 years ago, likely persists. YVO scientists are working to understand the nature of the unusual signal, and will continue to monitor it carefully.
Please see: www.uusatrg.utah.edu... for a map of GPS stations in the Yellowstone vicinity. For a graph of daily GPS positions at White Lake, within the Yellowstone caldera, please see:
pboweb.unavco.org...×eries=raw
Originally posted by Theriteway
reply to post by Anmarie96
Nor am I able to check on the temperature data recently. Such as Steamboat. volcanoes.usgs.gov...
I can find no data available at any of the monitoring stations. Curious
I will start checking more frequently.
Researcher Patricia Gregg explains the process: "You can compare it to cracks forming on the top of baking bread as it expands. As the magma chamber pressurizes at depth, cracks form at the surface to accommodate the doming and expansion. Eventually, the cracks grow in size and propagate downward toward the magma chamber. In the case of very large volcanoes, when the cracks penetrate deep enough, they can rupture the magma chamber wall and trigger roof collapse and eruption."