1.8
Earthquake details: 20 km E of Castle Rock, Washington, United States
Oct 6, 2026, 19:59:38
- Depth
- 16.52 km
- Felt reports
- No data
Source: USGSUpdated: Oct 6, 2026, 08:15 PM UTC
A magnitude 1.8 earthquake occurred on Oct 6, 2026 at 19:59:38. Epicenter: 20 km E of Castle Rock, Washington, United States. Reported depth: 16.52 km.
Status: Reviewed
Tsunami information
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Time & depth
- Local time
- Oct 6, 2026, 12:59:38 PDT
- UTC
- Oct 6, 2026, 19:59:38 UTC
16.52 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
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Nearby major cities
Agency measurements
Agencies may use different observations and magnitude scales, and initial estimates can change.
- USGSml 1.82
uw714117031
- Depth:
- 16.52 km
- Status:
- Reviewed
- Time:
- Updated:
- Oct 6, 2026, 08:15 PM UTC
Technical Details
Depth16.52 km
Significance51
Latitude46.2477
Longitude-122.6435
Event IDuw714117031
Magnitude1.8
Updated:Oct 6, 2026, 20:15:30 UTC
Regional Seismicity
External Resources
Related tools
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: Oct 6, 2026, 20:15 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).