U of U Seismograph Stations

PRESS RELEASE

University of Utah Seismograph Stations 

Released: March 29, 11:30 AM (MDT)

The University of Utah Seismograph Stations reports a sequence of earthquakes beneath the northern portion of Yellowstone Lake, WY, approximately 3 mi SSE of Lake, WY. The sequence began with a magnitude 0.7 earthquake at 11:18 PM (MDT) on March 28. As of 11:30 AM on March 29, 60 earthquakes have been recorded, with magnitudes ranging from -0.1 to 3.7. Additional smaller magnitude events are still being reviewed. Two earthquakes in the sequence were above magnitude 3.0. These were a magnitude 3.1 at 7:05 AM and a magnitude 3.7 at 8:24 AM.

Earthquake sequences like these are common and account for roughly 50% of the total seismicity in the Yellowstone region.

A total of 44 earthquakes of magnitude 3.0 or greater have occurred within 16 mi of the epicenter of the M3.7 event since 1962.  The largest of these events was a magnitude 3.9 on December 27, 2008, 4.3 mi SSE of Fishing Bridge, WY.  One earthquake of magnitude 4.5 or greater has occurred within 32 mi of the epicenter of this event since 1962.  This was a magnitude 4.8 on March 30, 2014, 2.8 mi N of Norris Junc., WY.

Anyone who felt an earthquake is encouraged to fill out a survey form on the US Geological Survey website: earthquake.usgs.gov.

PRESS RELEASE

University of Utah Seismograph Stations

Released: January 16, 2020 08:30 PM MST

The University of Utah Seismograph Stations reports that a light earthquake of magnitude 4.0 occurred at 07:31 PM on January 16, 2020 (MST). The epicenter of the shock was located in southwestern Utah beneath the Mineral Mountains, 10.4 mi SE of the town of Milford, UT and 6 mi NNE of Minersville, UT. The shock was reported felt by residents of Milford and Cedar City as well as other nearby localities. The earthquake was followed by a magnitude 1.5 aftershock that occurred nine minutes later.

Today’s earthquake occurred in a seismically active area of Utah. A total of 17 earthquakes of magnitude 3.0 or greater have occurred within 16 mi of the epicenter of this event since 1962.

The largest of these events was a magnitude 3.9 on April 10, 1998, 1.4mi NNE of Milford, UT.  In 1991 a magnitude 4.6 earthquake occurred 13 miles SE of Minersville.

Anyone who felt the earthquake is encouraged to fill out a survey form on the US Geological Survey website: https://earthquake.usgs.gov/earthquakes/eventpage/uu60356907/tellus.

Earthquake Summary:

Date (UTC):   January 17, 2020         Time (UTC): 02:31

Date (local): January 16, 2020         Time (local): 07:31 PM MST

Latitude:     38 17.50′ N

Longitude:    112 52.43′ W

Preferred magnitude: 4.00 Ml