Earthquakes in Vernal and Corrine? Nope. Mine blast combined with small tremor shook things up

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20180924 Welcome sign located in Vernal, Utah, gateway to Dinosaur National Monument.

Welcome sign located in Vernal, gateway to Dinosaur National Monument. | Pixabay

SALT LAKE CITY — What a couple of rural communities thought were earthquakes were actually just earth shakes caused by nearby mining.

The U.S. Geological Survey initially sent out a notification Thursday afternoon that a 3.1 magnitude earthquake shook Vernal around 3:22 p.m., with another earthquake shaking the ground near Corinne, Utah, at a 3.43 magnitude just a few minutes later.

But the University of Utah’s Seismograph Station corrected that information later that evening, saying in a tweet that the “event” in Vernal was caused by a “quarry blast” while the Corinne shaking was actually a “micro earthquake.”

In fact, the event 22 kilometers southwest of Corinne was miscategorized because it happened just 30 seconds after the quarry blast.

Here are links to the two events:
The Vernal event is marked “quarry blast” and the Corinne event is marked “micro earthquake”.https://t.co/7dyHfDXXpM pic.twitter.com/mqT4G78OPO

— UUSS (@UUSSquake) August 7, 2020

“Because this event (Corinne) occurred 30 seconds apart from a M1.0 earthquake beneath the Great Salt Lake, the M1.0 event was initially reported as a M3.4 but was quickly reviewed by a UUSS seismologist,” the tweet said.

…read more

Source:: Deseret News – Utah News

      

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