M 3.5 near southern boundary of Yellowstone National Park

University of Utah Seismograph Stations

Released: August 15, 2019 02:30 PM MDT


The University of Utah Seismograph Stations reports that a minor earthquake of magnitude 3.5 occurred at 01:46 PM on August 15, 2019 (MDT).  The epicenter was located on the southern boundary of Yellowstone National Park,  22.2 miles southeast of West Thumb Geyser Basin and 48.7 miles northeast of Jackson, WY.  Earthquake activity in this location is not unusual.  A total of 9 earthquakes of magnitude 3.0 or greater have occurred since 1962 within 16 miles of todays earthquake.  The largest of these events was a magnitude 4.3 on August 21, 2003 located 22.5 miles south-southeast of West Thumb Geyser Basin and 44.2 miles north-northeast of Jackson, WY.

There have been no felt reports for todays earthquake at the time of this writing.  Anyone who felt the earthquake is encouraged to fill out a survey form either on the University of Utah Seismograph Stations website: www.quake.utah.edu or the U.S. Geological Surveys website: earthquake.usgs.gov.

Earthquake Summary:
Date (UTC): August 15, 2019 Time (UTC): 19:46
Date (local): August 15, 2019 Time (local): 01:46 PM MDT
Latudute: 44 7.66’ N
Longitude: 110 22.73’ W
Preferred magnitude: 3.5 Ml