An curved arrow pointing right. The US Geological Survey (USGS) estimates that millions of earthquakes occur every year, but only one of them will be a "great earthquake" — that is, one with a ...

so check out this map to know what to expect. The 24-Hour Aftershock Forecast provided by the USGS indicates the probability of strong earthquake shaking (Modified Mercalli Intensity VI or ...

the first earthquake occurred around 9:44 a.m. about three miles northeast of San Bernardino followed by another at 9:48 a.m. A USGS map showed shock waves reached areas of Fontana, Redlands ...