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3.9 aftershock felt along the Wasatch Front

By Jen Riess, KSL.com | Updated - Mar. 22, 2020 at 9:13 p.m. | Posted - Mar. 22, 2020 at 7:31 p.m.



SALT LAKE CITY — Residents along the Wasatch Front felt a 3.9 magnitude aftershock Sunday evening.

The aftershock originated in Magna at 7:17 p.m. and was felt almost 4 miles from the epicenter, according to the Utah USGS.

The earthquake was originally reported as a 4.1 magnitude aftershock and was later reduced to 3.9.

This is one of more than 90 aftershocks felt throughout the week after Wednesday's 5.7 magnitude earthquake. Most of the aftershocks have been below 2.5 magnitudes. Officials say more aftershocks could be felt in the coming days or weeks. So far there have been 28 magnitude 3.0 or higher aftershocks, which are strong enough to be felt.

"When there are more earthquakes, the chance of a large earthquake is greater which means that the chance of damage is greater," according to the USGS.

Utah Emergency Management tweeted that a number of 4.0 magnitude aftershocks are expected.

"These aftershocks don't mean they are getting bigger, just that we will have some M4s in the mix," read the tweet.

USGS said there is at least a 1% chance that one or more aftershocks will be larger than 5.7 magnitude; however, the expected number of earthquakes has decreased compared to earlier forecasts from the initial earthquake due to the rate of aftershocks slowing down.

There is a 38% chance of another earthquake or aftershock that people could feel within the next week, according to the USGS.

Jen Riess

KSL Weather Forecast