Science ❯ Geology ❯ Seismology ❯ Earthquake Measurement

Magnitude Scales

Preliminary Magnitude 3.6 Quake Strikes Near Alamo, No Damage Reported

With USGS measurements still provisional, seismologists are monitoring data and urging residents to prepare for possible aftershocks.

Magnitude 6.2 Quake Shakes Hokkaido With No Tsunami Warning

Magnitude 4.6 Quake Rattles Bay Area From Epicenter Near Boulder Creek

Magnitude 6.5 Quake Strikes Near Goroka, Papua New Guinea

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

Calaveras Fault Swarm Rattles East Bay as Dozens of Small Quakes Follow M3.8 Near San Ramon

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

Cebu Earthquake Death Toll Climbs to 69 as Search Continues

3.4-Magnitude Earthquake Jolts Pinole, California