Buckle up for likely earthquake aftershocks, geologists say. Here's how the East Coast should prepare.

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image of earthquake emergency alert on cellphone
An emergency alert that appeared on cellphones across the east coast on Friday.

David Dee Delgado/Getty Images

An estimated 4.8 magnitude earthquake just rattled New York City

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New York City skyline and USGS Epicenter map.
The New York City skyline and the US Geological Survey's epicenter map.

Diana Robinson Photography/ Getty Images; USGS

A part of Afghanistan not known for seismic activity was struck by an 'unprecedented' number of big earthquakes this week and no one knows when they'll end, an expert says

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Several tents that residents of Herat are sleeping in to avoid buildings that could collapse in future earthquakes.
Thousands of people living in Herat are now sleeping in tents to stay safe from buildings that could collapse in future quakes.

Esmatullah Habibian/Middle East Images/AFP via Getty Images

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