USGS · EARTHQUAKE

M -0.4 · 11 km WNW of Dutch Harbor, Alaska

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

Source agencyUSGS

Provider event IDav94457083

Magnitude-0.4 ml

Depth4.6 km

Occurred / latest reportedOct 19, 2026, 3:28 PM UTC

Provider last updatedOct 20, 2026, 2:57 AM UTC

TerraPulse collectedOct 21, 2026, 1:50 AM UTC

Catalog statusreviewed

Reported geometryPoint

Location qualityValidated coordinate format (not accuracy assurance)

Country assignmentUnited States

Coordinates (lon, lat)-166.7000, 53.9290

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": [
    -166.7,
    53.929,
    4.56
  ]
}

Revision observations

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

Collected2026-10-21T01:50:15.594Z· Provider update2026-10-20T02:57:10.320Z · Magnitude -0.44

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