Science ❯ Geology ❯ Seismology ❯ Earthquake Measurement

Magnitude Scales

Magnitude 6.5 Quake Strikes Near Goroka, Papua New Guinea

USGS issues a green alert indicating low expected impacts given its depth and remote location.

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