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435 Aftershocks Rattle Magna Since 5.7-Magnitude Earthquake

A 5.7-magnitude earthquake with an epicenter near Magna rocked the Wasatch Front on Wednesday.

MAGNA, Utah – New data shows there have been more than 435 aftershocks in Magna since the 5.7-magnitude earthquake that shook much of Northern Utah.

The University of Utah Seismograph Stations website showed that 31 of those aftershocks were a magnitude 3.0 or larger.

University researchers have gone out to the hardest hit areas to looking for answers about the fault line, and how bad future shakes will be.

“In general, the subsurface structure is more or less unknown. We’re using this new data from this earthquake sequence to discover what the faults are doing,” said seismologist Amir Allam, a research assistant professor in geology and geophysics.

Allam said in the West, the faults go deeper underground, giving researchers less information.

He and his team have placed sensors near the earthquake and along the Wasatch fault, assisted by over 200 volunteers who put sensors in their homes to gather information.

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