Science ❯ Geology ❯ Seismology ❯ Earthquake Magnitude

Seismic Activity

Magnitude 4.6 Quake Rattles Bay Area From Epicenter Near Boulder Creek

Early warnings reached hundreds of thousands of phones, with aftershock odds still elevated.

Magnitude 7.4 Quake Strikes Indonesia's Molucca Sea as Tsunami Alert Lifts

Earthquake Swarm Near San Ramon Sends M4.2 Jolt, Triggers BART Inspections

Japan Issues Rare Megaquake Advisory as Injuries Rise After M7.5 Off Northern Coast

San Ramon Quake Swarm Flares Up, Rattles Oakland With New Jolts

Tsunami Warnings Lifted After Powerful Quake Off Northeast Japan

USGS Investigates False 5.9 Nevada Quake Alert That Lit Up Phones Across California

Magnitude 3.6 Quake Reported Near Vallejo With No Immediate Damage

Great ShakeOut Engages 10 Million Californians as Small Berkeley Quake Underscores Risk

Cebu Earthquake Death Toll Climbs to 69 as Search Continues

Fresh Aftershocks Rattle Eastern Afghanistan as Quake Toll Tops 2,200

Afghanistan Quake Leaves 800–1,100 Dead as Rescuers Struggle to Reach Cut-Off Villages

Tsunami Warnings Downgraded After Magnitude-8.8 Quake Off Kamchatka