USGS · EARTHQUAKE

M 0.6 · 86 km NNW of Karluk, Alaska

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

Source agencyUSGS

Provider event IDav93068439

Magnitude0.6 ml

Depth3.9 km

Occurred / latest reportedOct 20, 2026, 12:14 PM UTC

Provider last updatedOct 21, 2026, 1:34 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)-155.1118, 58.2667

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": [
    -155.111833333333,
    58.2666666666667,
    3.92
  ]
}

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 update2026-10-21T01:34:44.320Z · Magnitude 0.61

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