Environment ❯ Natural Hazards

Seismic Activity

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Magnitude 4.2 Earthquake Shakes Puget Sound Near Wauna

Seismologists released aftershock probabilities and agencies reported no tsunami threat.

Southern California Faults at 1,000‑Year Stress High as Cajon Pass Could Let Ruptures Cross

New Quake Record Revives San Andreas Questions as San Francisco Steps Up Safety Push

Deep 7.6 Earthquake Strikes Near Tonga’s Neiafu

New Study Finds Cascadia and San Andreas Quakes Have Often Struck in Tandem

Study Finds Cascadia Megathrust Often Triggers Northern San Andreas in Closely Timed Quakes

Canada Updates Seismic Model After Study Flags Yukon’s Tintina Fault as 7.5-Magnitude Threat

Tintina Fault, Once Dormant, Is Straining Toward a Magnitude 7.5+ Quake