USGS · EARTHQUAKE

M 1.3 · 2 km ENE of Southworth, Washington

A reported observation from the original data provider. Values may be revised as new information becomes available.

Source agencyUSGS

Provider event IDuw714122312

Magnitude1.3 ml

Depth27.9 km

Occurred / latest reportedOct 20, 2026, 1:15 PM UTC

Provider last updatedOct 20, 2026, 6:52 PM UTC

TerraPulse collectedOct 21, 2026, 1:50 AM UTC

Catalog statusreviewed

Reported geometryPoint

Location qualityValidated coordinate format (not accuracy assurance)

Country assignmentOffshore, non-point or unassigned

Coordinates (lon, lat)-122.4737, 47.5238

GDACS alertNot applicable

Magnitude measures earthquake size; intensity describes shaking at a location. Magnitude alone does not establish casualties or damage.

USGS tsunami flag:0 (not set). This flag does not confirm a tsunami or an official tsunami warning. Consult official warning centers.

Original reported GeoJSON geometry

{
  "type": "Point",
  "coordinates": [
    -122.473666666667,
    47.5238333333333,
    27.85
  ]
}

Revision observations

Changes observed since TerraPulse began collecting this event; this is not a complete provider revision history.

Collected2026-10-21T01:50:15.154Z· Provider update2026-10-20T18:52:53.820Z · Magnitude 1.31

Geographic proximity only; events have not been merged or confirmed as related. Distances use the first reported coordinate for non-point geometries.