University of Utah Seismograph Stations
Released: September 18, 2017 12:00 PM MDT
The University of Utah Seismograph Stations reports that a minor earthquake of magnitude 3.3 occurred at 11:21 AM on September 18, 2017 (MDT). The shock was located 14 km (8 miles) beneath the Wasatch Mountains, 5 km (3 miles) south of the town of Summit Park, Utah, and 11 km ( 7 mi) WNW of Park City, UT. This earthquake was reported felt in Park City and Salt Lake City, Utah, other locations in the Salt Lake Valley, and in northern Utah County. Four other earthquakes of magnitude 3.0 or greater have occurred within 25 km (16 miles) of the epicenter of this event since 1962. The largest of these events was a magnitude 3.6 on June 30, 1999, 6.9km ( 4.3 mi) W of Park City, UT.
Anyone who felt the earthquake is encouraged to fill out a survey form either on the Seismograph Stations website: www.quake.utah.edu or the US Geological Survey website: earthquake.usgs.gov.
Date (UTC): September 18, 2017 Time (UTC): 17:21
Date (local): September 18, 2017 Time (local): 11:21 AM MDT
Latitude: 40 42.05′ N
Longitude: 111 36.55′ W
Depth: 11.0 km below sea level
13.6 km below the surface
Preferred magnitude: 3.30 Ml
On February 26, 2016, an earthquake of magnitude 4.0 struck about 31 km (19 miles) east of Jackson, WY at about 5:00 PM local time. The quake was reported felt by over 150 people in the Teton region. There were no reports of any damage. The earthquake occurred in the Gros Ventre range east of Grand Teton National Park near the location of previous seismic activity. In 2010 there was a swarm of earthquakes, including a M4.8 earthquake, ~11 km (7 miles) north of this event.
The Teton region is part of the Intermountain Seismic Belt, a region of relatively high seismicity in the Intermountain West that extends from northern Arizona to western Montana. Most of the seismicity in the Teton region occurs east of Grand Teton National Park in the Gros Ventre range while there is very little earthquake activity on the Teton Fault.
News accounts for this event can be found at the following links:
Jackson Hole News & Guide, February 26, 2016
Casper Star Tribune, February 26, 2016
Jackson Hole News & Guide, February 27, 2016
Released: March 1, 2016 12:50 PM MST
The University of Utah Seismograph Stations reports that a minor earthquake of magnitude 3.8 occurred at 12:07 PM on March 01, 2016 (MST). The epicenter of the shock was located beneath Mount Ellsworth in southeastern Utah, 17 miles north-northeast of the Bullfrog Marina on Lake Powell and 43 miles south of the town of Hanksville, UT. Today’s earthquake occurred in an area of relatively low seismic activity. Since 1962, the largest earthquake to occur within 15 miles of the epicenter of today’s event was a magnitude 3.1 event on July 25, 1979.
Anyone who felt the earthquake is encouraged to fill out a survey form either on the Seismograph Stations web site: www.quake.utah.edu or the US Geological Survey website: earthquake.usgs.gov.