Latest Earthquakes near Sammamish
Live map and archive of seismic activity in and around Sammamish, Washington.
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1 day agoSammamish Activity Report
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Live map and archive of seismic activity in and around Sammamish, Washington.
Common Questions about Earthquakes near Sammamish
How often are earthquakes recorded in the Sammamish area?
In the past 7 days, the number of earthquakes of magnitude 1.5 or above recorded in the area within 100 km of Sammamish was 2. These figures describe the available records, not a prediction of future earthquakes.
When was the last earthquake near Sammamish?
The most recent recorded earthquake in the area within 100 km of Sammamish had a magnitude of 1.8 and occurred on November 12, 2026 at 12:24 PM PST.
How strong was the largest recent earthquake in the Sammamish area?
Among the available records for the area within 100 km of Sammamish, the largest earthquake in the past 365 days had a magnitude of 4.2. These figures describe the available records, not a prediction of future earthquakes.
How far back does the earthquake data go?
The historical search starts in 1900, but available records vary by region and source. Older and smaller earthquakes may be missing. A long search can reach the list’s display limit, so narrow the date range to explore it in more detail.
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Earthquake information is automatically aggregated from the official seismic agencies listed below. Preliminary measurements can change as agencies review an event; use local emergency authorities for safety decisions. Latest successful data update: Nov 14, 2026, 10:00 UTC.
Data sources:
- USGS — Credit: U.S. Geological Survey.
- EMSC — Credit: EMSC/CSEM. Event catalogue data are provided under CC BY 4.0.
- JMA — Source: Japan Meteorological Agency (JMA).
- Geoscience Australia — Based on Australian Earthquakes data by Geoscience Australia. © Commonwealth of Australia. Licensed under CC BY 4.0; the section 5 disclaimer applies.
- GeoNet — We acknowledge the New Zealand GeoNet programme and its sponsors NHC, Earth Sciences NZ, LINZ, NEMA and MBIE for providing earthquake data.
- CENC / Wolfx — CENC earthquake parameters via Wolfx, an independent unofficial relay.
- GFZ / GEOFON — Locations, depths and magnitudes: GFZ/GEOFON using GEVN network data (CC BY 4.0).