Science ❯ Geology ❯ Seismology ❯ Earthquake Measurement

US Geological Survey

Overnight 4.2 Jolts Indio Area as Aftershock Swarm Follows 4.9 Quake

Officials say the sequence near the San Andreas is being closely monitored with a low chance of a larger event.

6.5-Magnitude Quake in Mexico Kills Two, Triggers Evacuations From Guerrero to Mexico City

San Ramon Logs 300-Plus Quakes in Ongoing Swarm as USGS Sees No Sign of Major Fault Rupture

Magnitude 4.1–4.2 Quake Near Glen Ellen Rattles Sonoma County

Howard Community College Links Water Main Break to 2.5-Magnitude Columbia Quake

Preliminary 3.2 Quake Rattles East Bay Near Briones Early Sunday

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

Magnitude 3.5 Earthquake Strikes North of Big Bear Late Saturday

Magnitude 4.3 Quake Near UC Berkeley Rattles Bay Area, Triggers ShakeAlert

M7.8 Quake Off Kamchatka Triggers Tsunami Alerts as Alaska Advisories Are Downgraded

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

Shallow 3.7–3.9 Quake Rattles Central California Near Hollister

Doctors Complete Surgery During 8.8-Magnitude Quake as Kamchatka Avoids Casualties