Volcano Update from Archive



YELLOWSTONE VOLCANO OBSERVATORY INFORMATION RELEASE
Saturday, December 27, 2008 20:29 MST (Sunday, December 28, 2008 03:29 UTC)


YELLOWSTONE VOLCANO (CAVW#1205-01-)
44.43°N 110.67°W, Summit Elevation 9203 ft (2805 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN

PRESS RELEASE FROM YVO PARTNER UNIVERSITY OF UTAH SEISMOGRAPH STATIONS

Released: December 27, 2008 04:40 PM MST


The University of Utah Seismograph Stations reports that a swarm of small earthquakes of magnitude 3.5 and smaller is occurring beneath Yellowstone Lake in Yellowstone National Park, five to nine miles south-southeast of Fishing Bridge, Wyoming. The swarm began yesterday afternoon, Dec. 26, and has continued and intensified today. The two largest earthquakes in this swarm have been shocks of magnitude 3.5 and 3.4 which occurred at 1:17 and 1:26 pm MST, respectively, today. Many smaller earthquakes have also occurred, including three events this morning of magnitude 2.5 to 2.8 and a magnitude 3.2 event at 3:30 pm MST. Some of the earthquakes in the swarm have been reported felt by people in the Yellowstone Lake area. Swarms of this nature are relatively common in this part of Yellowstone Park.

Summary for Largest Earthquake:

Date (UTC): December 27, 2008 Time (UTC): 20:17

Date (local): December 27, 2008 Time (local): 01:17 PM MST

Latitude: 44 28.85' N

Longitude: 110 21.74' W

Magnitude: average Ml: 3.50
average Mc: 3.6

Reported magnitude: 3.50

For the next ten days, an image of today's recordings from the nearby LKWY seismograph station can be viewed at:
http://www.seis.utah.edu/helicorder/heli/yellowstone/Uuss.LKWY_SHZ_US.2008122700.gif
After ten days, the image will be replaced by more recent data.

-----
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.