reply to post by MikeboydUS
Check this out Mike, this is the most recent activity at Yellowstone:
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
MARCH 2008 Yellowstone Seismicity Summary
During March 2008, 147 earthquakes were located in the Yellowstone National Park area. The largest of these shocks was a magnitude 4.2 on March 25,
2008 at 05:59 AM (MDT) located about 19 miles NE of Fishing Bridge, WY, and near the east boundary of the park. The shock was felt in Yellowstone
National Park, Cody WY and surrounding areas of Wyoming and Montana. The mainshock was followed by three aftershocks of magnitudes 1.0 to 2.4. Also,
an earthquake swarm occurred March 11 to 16th about 5 miles north northwest of Old Faithful, YNP. This sequence had 73 events ranging from magnitude
0.0 to 2.6. An additional earthquake swarm was located about 2 miles southeast of West Yellowstone, Montana on March 21 to 22nd. This sequence had 17
events ranging from magnitude -0.9 to 1.5.
Earthquake activity in the Yellowstone region is at normal background levels.
Ground Deformation Summary: Through March 2008, continuous GPS data show that most of the Yellowstone caldera continued moving upward at similar to
slightly lower rates as the past year. The maximum measured ground uplift over the past 40 months is ~19 cm at the White Lake GPS station. An example
can be found at: pboweb.unavco.org...
The general uplift of the Yellowstone caldera is scientifically interesting and will continue to be monitored closely by YVO staff.
An article on the current uplift episode at Yellowstone and discussion of long-term ground deformation at Yellowstone and elsewhere can be found at:
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.