Science ❯Geophysics ❯Seismology

Earthquake Measurement

Magnitude Magnitude Scale Richter Scale Tsunami Generation Tsunami Prediction Aftershocks Seismic Activity Alert Systems Sismológico Nacional Tsunami Formation Seismic Intensity Scale USGS Data US Geological Survey Historical Earthquakes Magnitude Estimation Magnitude Variations Magnitude Scales Tectonic Activity Magnitude and Depth Mercalli Scale National Seismological Center Shindo Scale

M4.4 Quake Near Manzanillo and Separate M4.2 in Veracruz Prompt Checks With No Damage Reported

Officials say inspections found no damage or injuries, with the seismic alert remaining inactive.

Magnitude 3.6 Quake Lightly Felt Near Port Renfrew

5.9-Magnitude Earthquake Shakes Oaxaca and Mexico City

3.5-Magnitude Earthquake Rattles Avellino Region

3.6-Magnitude Earthquake Shakes Emilia’s Modena Province

4.1-Magnitude Quake Rattles Assam’s Karbi Anglong District

Magnitude 4.6 Earthquake Shakes Campi Flegrei, Strongest in Four Decades

6.1-Magnitude Quake Off Lima Coast Kills One and Injures Dozens

Two Early-Morning Quakes Hit Manipur; No Damage Reported

Magnitude 6.1 Earthquake Strikes Off Crete, No Major Damage Reported

Second Magnitude 6.1 Earthquake Strikes Off Crete

Magnitude 4.4 Earthquake Strikes Campi Flegrei, Shaking Naples and Pozzuoli

Shallow 4.6-Magnitude Earthquake Strikes Pakistan, No Major Damage Reported

Magnitude 5.0 Earthquake Shakes Mendoza Province, No Damage Reported

Tajikistan Earthquake Revised to Magnitude 5.9, No Damage Reported

Magnitude 3.6 Earthquake Shakes Vendée, France

Tsunami Warning Issued After 7.1 Magnitude Earthquake Near Tonga

Magnitude 7.0 Earthquake Hits Off Kamchatka Peninsula

4.9-Magnitude Earthquake Shakes Southern California