QQuakeFacts
USGS usp000cae6

15 Oct 2003, 08:30

9 km NW of Kisarazu, Japan

A magnitude 5.2 mwc earthquake at 77.7 km depth.

Depth77.7 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated19 December 2025Latest timestamp stored in this record

Published location

Where is 9 km NW of Kisarazu, 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.

35.457000, 139.871000

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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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Catalog fields and provenance
Event ID
usp000cae6
Coordinates
35.457, 139.871
Network
us
Significance
416