Earthquakes

More than 57 million people worldwide have registered for the annual event, which started in Los Angeles in 2008.

Only 10 percent of Golden State residents carry earthquake insurance, with many citing high premiums and deductibles as the reason they forego coverage.

Hospitals must comply with 2030 deadlines to secure infrastructure and ensure operability in the event of a disaster.

Scientists are improving the system to give residents more time to react to strong quakes.

Southern California struck with 13 large tremors this year, with the latest rattling residents Monday.

The quake was followed by a series of aftershocks in rapid succession.

The shaker was likely an aftershock of a quake that rattled the area on Sunday, according to the U.S. Geological Survey.

A 4.8 magnitude earthquake and several aftershocks shook El Centro, east of San Diego, early Feb. 12, the U.S. Geological Survey reported.

The 4.6 jolt northwest of Malibu was felt across Southern California.

The earthquake was reported as being felt as far north as the Antelope Valley, as far east as Indio and along the coast from the U.S-Mexico border to Malibu.

There is also a chance for the largest quakes in California and Alaska, according to Mark Petersen, USGS geophysicist and lead author of the study.