A clearer look at earthquake faults in Utah

jdoughertyGeology

Thanks to a 4-year effort by the Utah Geological Survey, Utah now has a better look at Wasatch Front faults from southern Idaho to central Utah The overall length of the Wasatch fault, 240 miles, has not changed, but details to the existing faults have been added to the library. We now have 739 mapped miles of fault strands, compared … Read More

Was the March 18, 2020, Magna Earthquake in the Forecast?

Mackenzie CopeGeology, Recent earthquakes

Utah Geological Survey has a 50-year forecast for earthquakes. In 2016, the Working Group on Utah Earthquake Probabilities (WGUEP) published a 50-year forecast for moderate to large earthquakes in the Wasatch Front region. They determined there was a 93% chance of having one or more earthquakes of magnitude 5 or larger in that time period. Given that high probability, the … Read More

U.S. earthquake history: The Great Alaska Quake of 1964

jdoughertyGeology, Preparedness

And why we don’t expect an earthquake of that size in Utah. On Good Friday, March 27, 1964, at 5:36 p.m. local time, the earth began to shake in the subduction zone in the Prince William Sound in Alaska. The U.S. Geological Survey reports that: The earthquake caused rivers, lakes, and other waterways to slosh as far away as the … Read More

M6.5 quake shakes central Idaho

jdoughertyGeology, Recent earthquakes

Should Utah be concerned? Not about this one. But we should still be prepared in general. Utahns are reporting shaking as far south as Salt Lake County. And reports continue to roll in from around northern Utah. Utah is not expected to have any damage from shaking from this quake. The University of Utah Seismograph stations tweeted that they expect … Read More

UGS Resources on the Magna 5.7 Earthquake

Mackenzie CopeGeology

View the Utah Geological Survey’s database of geologic information from the March 18, 2020 earthquake, compiled the day of the earthquake and the days following. UGS Resources