Utah Earthquake update

M 5.7 - 6km NNE of Magna, Utah

2020-03-18 13:09:31 (UTC)

40.751°N 112.078°W 11.7 km depth

Tectonic Summary

The March 18, 2020 M5.7 earthquake north of Magna, Utah (just west of Salt Lake City) occurred as the result of normal faulting in the shallow crust of the North America plate. The focal mechanism solution for the earthquake indicates slip occurred on a moderately dipping fault striking either to the northwest, or to the south-southeast. The style, location, and depth of slip are consistent with an earthquake on the complex Wasatch fault system. This earthquake is located in the Intermountain seismic belt, a prominent north-south-trending zone of recorded seismicity in the Intermountain West, including the Wasatch Front urban corridor. The ISB region is 1000 km east of the primary North America–Pacific plate boundary which runs along the west coast of the United States. The Wasatch Front, encompassing Salt Lake City, has experienced infrequent, moderate-to-large earthquakes in the past. There are 26 documented M5+ earthquakes within 250 km of the March 18, 2020 event in the combined University of Utah Seismograph Stations and USGS earthquake catalog, which stretches back to the late 19th century. The largest recorded earthquake was a M6.6 earthquake in March 1934, in Hansel Valley on the north shore of the Great Salt Lake. In September 1962, a M5.0 earthquake occurred in a very similar location to today’s M 5.7 event, with strong shaking observed locally. Geologic investigations of the Wasatch fault indicate that large (M ~7) earthquakes occur about every 1300 years near Salt Lake City, with the most recent large earthquake about 1400 years ago.

https://earthquake.usgs.gov/earthquakes/eventpage/uu60363602/executive?utm_medium=social

Removal of DUMBS?