Global distribution of natural and induced seismicity. Natural earthquakes with moment magnitude higher than 5 are color-coded according to their hypocenter depth (upper right colorbar, U.S.

Earthquakes usually strike without warning. But sometimes they come in clusters — dozens or even hundreds of small quakes concentrated in one area over days or weeks. Geologists call these clusters ...

The U.S. Geological Survey was still trying to unravel how an alert was sent Thursday morning for a nonexistent 5.9 earthquake outside Dayton, Nevada. A quake of that size wouldn't be implausible.

The most recent, a 1.2-magnitude tremor, hit about 2 ½ miles northeast of San Ramon at 4:05 p.m. Sunday, Nov. 23. Getty Images/iStockphoto A swarm of small earthquakes has been rattling a Bay Area ...

There's a chance even more earthquakes will occur in the same area, a USGS research geologist told Newsweek.

Earthquakes in the American state of Utah, the Soultz-sous-Forêts region of France or in the Dutch province of Groningen should not be able to occur even if the subsurface has been exploited for ...