The head of Utah's emergency management agency is telling Salt Lake Valley residents that they should expect more aftershocks like the one that hit the area yesterday morning.

Joe Dougherty says the magnitude-4.2 earthquake that was centered northeast of Magna early yesterday was fairly normal, even though it happened less than two days after another strong aftershock that rocked parts of the Valley. 

There have been more than 12-hundred aftershocks since a magnitude-5.7 earthquake hit back on March 18th.  Seismologists say the aftershocks are just nature's way of trying to get back to normal after a larger earthquake.

University of Utah seismologist Jamie Ferrell says aftershocks are the way the earth tries to get back to normal following a larger earthquake.

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