Seattle
Two very different sources threaten the city: the shallow Seattle Fault runs straight beneath it, while the Cascadia subduction zone offshore last ruptured in January 1700 in an event recorded by a tsunami on the coast of Japan.
Danger Level (72h)
72-hour composite hazard forecast
Recent Quakes (14d)
Recorded in the selected 14d period
Max Magnitude (14d)
Largest earthquake in the selected 14d period
Tectonic Profile
Seismotectonic hazard assessment, structural exposure & historical context
Click to locate on map
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Living within 200 km of the city centre
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Mixed construction stock with regional engineering standards
Subduction Zone
Major plate boundary with high strain accumulation
Seismically Stable Period
No significant earthquakes recorded in the selected 14d period.
Seismic Activity
Every recorded earthquake in this area — filter by time range and sort by time or severity.
Regional Volcanism & Monitored Vents
Active vents and Holocene volcanic structures within the monitored boundary (Seattle) · 7
Frequently Asked Questions (FAQ)
Verified scientific, operational, and emergency protocols