Powerful M7.1 earthquake hits Southern California

Powerful M7.1 earthquake hits Southern California

A very strong and shallow earthquake registered by the USGS as M7.1 hit Southern California at 03:19 UTC on July 6, 2019 (20:19 local time, July 5). The agency is reporting a depth of 17 km (10.5 miles). EMSC is reporting M7.1 at a depth of 10 km (6.2 miles). This…

Earthquakes at Mendocino Triple Junction, California

Earthquakes at Mendocino Triple Junction, California

Five minor to moderately strong earthquakes were registered at Mendocino Triple Junction, west of Eureka, California at a depth of 10 km (6.2 miles) on May 5, 2019. The strongest was M4.8 detected at 06:46 UTC on May 5. The sequence started with M3.1 at 04:17 UTC,…

Almost 2 million previously unidentified earthquakes in Southern California

Almost 2 million previously unidentified earthquakes in Southern California

Caltech seismologists have identified nearly two million previously unidentified tiny earthquakes that occurred between 2008 and 2017 in Southern California, expanding the region's earthquake catalog by a factor of 10. Their efforts, published online by the…

Shallow M5.3 earthquake shakes Los Angeles area, California

Shallow M5.3 earthquake shakes Los Angeles area, California

A strong earthquake measuring M5.3 on the Richter scale hit near the coast of Los Angeles, California at 19:29 UTC (12:29 PDT) on April 5, 2018. The USGS is reporting a depth of 16.8 km (10.4 miles). The epicenter was located 28 km (17.4 miles) SW of Santa Cruz Is….

Shallow M5.8 earthquake hits off the coast of Northern California

Shallow M5.8 earthquake hits off the coast of Northern California

A strong and shallow earthquake registered by the USGS as M5.8 hit off the coast of Northern California at 16:39 UTC (08:39 PST) on January 25, 2018. The agency is reporting a depth of 5 km (3.1 miles). EMSC is reporting M5.8 at a depth of 2 km (1.2 miles). The…

More than 130 quakes after M4.6 NE of Gonzales, California

More than 130 quakes after M4.6 NE of Gonzales, California

Following a M4.6 earthquake that hit just NE of Gonzales, California on November 13, 2017, the USGS has registered more than 130 aftershocks within the 5 km (3.1 miles) of the epicenter. Although most of those aftershocks weren't felt by the Central Coast, the…

Shallow M5.7 earthquake hits off the coast of Northern California

Shallow M5.7 earthquake hits off the coast of Northern California

A shallow earthquake registered by the USGS as M5.7 hit off the coast of Northern California, US at 19:50 UTC on September 22, 2017. The agency is reporting a depth of 9.1 km (5.6 miles). The epicenter was located 58 km (36 miles) W of Ferndale, 58 km WNW of…

How large-scale water cycles influence quake activity in California

How large-scale water cycles influence quake activity in California

A new study shows how seasonal changes in large-scale water cycles in California influence small-scale quake activity. It confirms that the annual hydrological loading cycle modulates microseismicity in California. The results of the study reveal how snow, rain,…