Science ❯ Geology ❯ Seismology ❯ Earthquake Measurement

Magnitude Scales

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

Seismologists describe a localized swarm on the Calaveras fault with activity tapering after more than 40 shallow events.

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