A magnitude 4.2 earthquake was recorded 6 km WNW of Wauna, Washington on Sep 29, 2026, 9:05:56 PM (2026-09-29T21:05:56.370Z). The earthquake occurred at a depth of 27.9 km with coordinates 47.4003, -122.7220.
M4.2 · 27.9 km deep · 37 km SW of Seattle, United States
Magnitude 4.2 (ml) was reported for this earthquake.
Reported depth: 27.9 km (shallow, 0–70 km).
The epicentre was 37 km SW of Seattle, United States.
USGS significance score: 271. USGS calculates this number from magnitude, maximum intensity, felt reports and estimated impact; it is not a risk rating.
No felt reports or intensity data have been published for this event.
General information: magnitude measures the energy released at the source on a logarithmic scale — each whole number is roughly 32 times more energy. Depth is how far below the surface the rupture began. Whether an earthquake is felt, and how strongly, depends on many factors and is best shown by felt reports and intensity data.
The epicentre was located at 47.4003 latitude and -122.7220 longitude, 6 km WNW of Wauna, Washington. The earthquake was shallow at 27.9 km depth.
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Data source: USGS Earthquake Hazards Program event page. Earthquake data is collected from multiple seismic agencies, including the USGS, GeoNet, BMKG and the British Geological Survey (BGS).
Data source: USGS Earthquake Hazards Program. Enable JavaScript for the live interactive map.