USGS · EARTHQUAKE

M 4.0 · 9 km ENE of Nakatonbetsu, Japan

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

Source agencyUSGS

Provider event IDus6000u14x

Magnitude4.0 mb

Depth277.9 km

Occurred / latest reportedOct 9, 2026, 9:49 AM UTC

Provider last updatedOct 9, 2026, 11:45 AM UTC

TerraPulse collectedOct 21, 2026, 1:50 AM UTC

Catalog statusreviewed

Reported geometryPoint

Location qualityValidated coordinate format (not accuracy assurance)

Country assignmentJapan

Coordinates (lon, lat)142.4121, 45.0037

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": [
    142.4121,
    45.0037,
    277.907
  ]
}

Revision observations

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

Collected2026-10-21T01:50:20.613Z· Provider update2026-10-09T11:45:49.040Z · Magnitude 4

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