On Monday morning, around 30 minor earthquakes erupted in a swarm near the Geysers geothermal field south of Clear Lake. The day before, seven quakes rattled Sonoma County, including a 4.0 quake. The recent uptick isn't out of the ordinary, according to U.S. Geological Survey seismologist Susan Hough.

Expert urges quake preparedness for Karachi, says city sits near three-plate junction and multiple fault lines

The quake struck the country's north just days after a 7.5-magnitude earthquake in the same region injured 50 people.

The clusters of earthquakes have all been underneath the East Bay suburb of San Ramon, which is close to the Calaveras fault. There were at least 19 earthquakes of magnitude 2 or greater on Monday alone.

California's seismic risk is increasing with supershear earthquakes, which are faster and more destructive than typical earthquakes.

The new quake off Aomori prefecture triggered a fresh tsunami advisory from the Japan Meteorological Agency, which warned of the potential for 1 metre tsunami waves along much of the Pacific coast of Hokkaido, Aomori, Iwate and Miyagi prefectures.

A rare, ultra-long earthquake in Myanmar revealed that mature faults can deliver their full force directly to the surface. The discovery could mean stronger shaking near faults like California’s San Andreas than current models predict.

Japan woke up to renewed anxiety after a strong offshore earthquake rattled its northern regions, once again reminding the country of its fragile relationship with nature. The latest tremor, felt along the coasts of Aomori and Hokkaido,