Science ❯ Geology ❯ Seismology ❯ Earthquake Measurement

Magnitude Scale

Strong, Shallow Quake Shakes Japan’s Shimane Prefecture as JMA Warns of Aftershocks

Authorities now focus on a weeklong window of elevated aftershock risk following inspections that cleared energy facilities.

Small Earthquake Shakes Milford, New Hampshire, Overnight

Magnitude-7.0 Offshore Quake Shakes Northern Taiwan With Limited Damage

Three Quakes Jolt San Ramon as USGS Revises Largest to Magnitude 4.0

Rapid Earthquake Swarm Rattles San Ramon With Two Magnitude 4.0 Quakes

Magnitude 3.1 Quake Rattles San Ramon, Extends East Bay Swarm

Magnitude 4.1–4.2 Quake Near Glen Ellen Rattles Sonoma County

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

Series of Small Quakes Rattles Bay Area and Central Coast, Latest a M3.4 Near San Juan Bautista

Magnitude 6.0 Quake Near Anchorage Rattles Southcentral Alaska on Thanksgiving

Paso Robles 4.1 and San Ramon 3.3 Quakes Rattle California With Little Damage

Magnitude 3.6 Quake Reported Near Vallejo With No Immediate Damage

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

6.3-Magnitude Quake Strikes Northern Afghanistan, Killing at Least 20 and Injuring Hundreds

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

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

Powerful Offshore Quake Strikes Southern Philippines; Tsunami Threat Lifted