Second 6.0+ magnitude quake strikes Puerto Rico amid heavy seismic activity Tuesday morning

A 6.4-magnitude earthquake struck Puerto Rico before dawn on Tuesday, and was followed three hours later by an aftershock measuring 6.0. They are the largest in a series of quakes that have struck the U.S. territory in recent days and caused heavy damage in some areas. 

Scientists discover big storms can create 'stormquakes'

Scientists have discovered a mash-up of two feared disasters — hurricanes and earthquakes — and they're calling them "stormquakes."

Scientists discover big hurricanes can create 'stormquakes'

The combination of two frightening natural phenomena might bring to mind "Sharknado ," but stormquakes are real and not dangerous. 

Magnitude 6.3 earthquake rumbles off Oregon coast

COOS BAY, Ore. (AP) — A 6.3-magnitude earthquake struck Thursday off the Oregon coast but did not generate a tsunami or cause any damage or injuries, authorities said.

Arizonans on edge after aftershocks felt throughout the Valley
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Friday night's earthquake was preceded by Thursday's 6.4-magnitude quake, which hit the Mohave Desert. It was followed by a series of aftershocks, including a few above magnitude 5. All of the earthquakes lasted less than 30 seconds and they were felt nearly 500 miles away, including right here in the Valley.