Archive of Yellowstone Updates for 2006
Tuesday, December 5, 2006 16:00 MST (Tuesday, December 5, 2006 23:00 UTC)
YELLOWSTONE VOLCANO (CAVW#1205-01-)
44.43°N 110.67°W, Summit Elevation 9203 ft (2805 m)
Volcanic-Alert Level: NORMAL
Aviation Color Code: GREEN
November 2006 Yellowstone Seismicity Summary
During the month of November 2006, 87 earthquakes were located in the Yellowstone region. The largest of these shocks was a magnitude 2.7 on November 4, 2006 at 7:08 PM MST, located about 12 miles west of Old Faithful. A small swarm of 47 earthquakes of magnitude -0.1 to +2.7, including the largest even mentioned above, occurred on Nov 4-7, also about 12 miles west of Old Faithful.
Earthquake activity in the Yellowstone region is at relatively low background levels.
Ground Deformation Summary: Through November 2006, continuous GPS data show that most of the Yellowstone caldera continued moving upward at the same relative rates as the past year. The maximum measured ground uplift over the past 28 months is ~13 cm at the White Lake GPS station. An example can be found at: http://www.mines.utah.edu/~ggcmpsem/UUSATRG/GPS/Site_Info/pboscat_lkwy.gif
The general uplift of the Yellowstone caldera is scientifically interesting and will continue to be monitored closely by YVO staff.
An article on another recent uplift episode at Yellowstone and discussion of long-term ground deformation at Yellowstone and elsewhere can be found at: http://volcanoes.usgs.gov/yvo/2006/uplift.html
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The Yellowstone Volcano Observatory (YVO) is a partnership of the U.S. Geological Survey (USGS), Yellowstone National Park, and University of Utah to strengthen the long-term monitoring of volcanic and earthquake unrest in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.
Real-time Monitoring Information is available on the YVO Monitoring pages
For more information about the Volcano Alert Level and Aviation Color Code, please see the USGS Volcanic Activity Alert-Notification System web page.
