USGS · EARTHQUAKE

M 4.9 · South Sandwich Islands region

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

Source agencyUSGS

Provider event IDus6000tzg0

Magnitude4.9 mb

Depth10.0 km

Occurred / latest reportedOct 4, 2026, 1:47 AM UTC

Provider last updatedOct 4, 2026, 3:12 AM 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)-23.3522, -58.1594

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": [
    -23.3522,
    -58.1594,
    10
  ]
}

Revision observations

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

Collected2026-10-21T01:50:23.063Z· Provider update2026-10-04T03:12:07.040Z · Magnitude 4.9

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