USGS · EARTHQUAKE

M 4.5 · 2 km N of Honchō, Japan

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

Source agencyUSGS

Provider event IDus6000u3rn

Magnitude4.5 mb

Depth90.3 km

Occurred / latest reportedOct 21, 2026, 1:04 AM UTC

Provider last updatedOct 21, 2026, 4:14 AM UTC

TerraPulse collectedOct 21, 2026, 4:17 AM UTC

Catalog statusreviewed

Reported geometryPoint

Location qualityValidated coordinate format (not accuracy assurance)

Country assignmentJapan

Coordinates (lon, lat)139.9836, 35.7245

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": [
    139.9836,
    35.7245,
    90.274
  ]
}

Revision observations

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

Collected2026-10-21T04:17:06.368Z· Provider update2026-10-21T04:14:51.855Z · Magnitude 4.5

Collected2026-10-21T03:30:06.024Z· Provider update2026-10-21T03:28:25.610Z · Magnitude 4.5

Collected2026-10-21T02:59:04.781Z· Provider update2026-10-21T02:57:53.108Z · Magnitude 4.5

Collected2026-10-21T01:50:15.154Z· Provider update2026-10-21T01:48:33.424Z · Magnitude 4.5

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