QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000c9u1
USGS usp000c9u1

7 Oct 2003, 07:11

120 km S of Koshima, Japan

A magnitude 5 mb earthquake at 33 km depth.

Depth33 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated7 November 2014Latest timestamp stored in this record

Published location

Where is 120 km S of Koshima, Japan?

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

29.153000, 130.588000

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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.

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Nearby events with a similar magnitude

M 5

117 km N of Naze, Japan

M 5

111 km N of Naze, Japan

M 5

51 km ENE of Nishinoomote, Japan

M 5

131 km SE of Koshima, Japan

M 5

103 km SE of Naze, Japan

M 5

31 km ESE of Nichinan, Japan

Catalog fields and provenance
Event ID
usp000c9u1
Coordinates
29.153, 130.588
Network
us
Significance
385