QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0004dkt
USGS usp0004dkt

18 Aug 1990, 19:52

232 km NW of Sabang, Indonesia

A magnitude 6 mw earthquake at 21.4 km depth.

Depth21.4 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated28 April 2022Latest timestamp stored in this record

Published location

Where is 232 km NW of Sabang, Indonesia?

This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.

7.507000, 93.975000

Open the interactive map ↗

Map data © OpenStreetMap contributors

What the numbers mean

Magnitude measures event size; depth locates the source below the surface. Neither value alone establishes local damage or personal risk.

Need a current safety answer?

Use local emergency authorities and the live USGS event page. This historical evidence page is not an alert service.

Open the USGS event →

Continue exploring

Nearby events with a similar magnitude

M 6

Nicobar Islands, India region

M 6

274 km SSE of Port Blair, India

M 6

Nicobar Islands, India region

M 6

99 km ENE of Port Blair, India

M 6.01

Nicobar Islands, India region

M 6.04

178 km S of Port Blair, India

Catalog fields and provenance
Event ID
usp0004dkt
Coordinates
7.507, 93.975
Network
us
Significance
554