USGS · EARTHQUAKE

M 4.0 · 284 km S of Alo, Wallis and Futuna

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

Source agencyUSGS

Provider event IDus7000tj3l

Magnitude4.0 mb

Depth429.9 km

Occurred / latest reportedSep 22, 2026, 5:31 AM UTC

Provider last updatedOct 12, 2026, 2:44 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)-177.6334, -16.8394

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": [
    -177.6334,
    -16.8394,
    429.85
  ]
}

Revision observations

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

Collected2026-10-21T01:50:29.152Z· Provider update2026-10-12T14:44:18.040Z · Magnitude 4

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