USGS · EARTHQUAKE

M 5.3 · 47 km NNE of Chilecito, Argentina

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

Source agencyUSGS

Provider event IDus6000tx29

Magnitude5.3 mww

Depth121.4 km

Occurred / latest reportedSep 23, 2026, 9:21 AM UTC

Provider last updatedOct 21, 2026, 4:30 AM UTC

TerraPulse collectedOct 21, 2026, 4:31 AM UTC

Catalog statusreviewed

Reported geometryPoint

Location qualityValidated coordinate format (not accuracy assurance)

Country assignmentArgentina

Coordinates (lon, lat)-67.3020, -28.7705

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": [
    -67.302,
    -28.7705,
    121.407
  ]
}

Revision observations

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

Collected2026-10-21T04:31:16.395Z· Provider update2026-10-21T04:30:43.868Z · Magnitude 5.3

Collected2026-10-21T01:50:28.596Z· Provider update2026-10-15T13:56:49.887Z · Magnitude 5.3

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