Cascadia & Pacific Northwest
The Juan de Fuca plate subducts beneath North America along the 1,000 km Cascadia trench. Last ruptured in a full-margin Mw ~9.0 megathrust in January 1700, this locked zone poses catastrophic tsunami and shaking risk to Seattle, Portland, and Vancouver.
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 seismically active radius (~300 km)
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Mixed construction stock with regional engineering standards
Subduction Zone
Active fault boundary with frequent seismicity
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 (Cascadia & Pacific Northwest) · 26