QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000ja9j
USGS usp000ja9j

3 Nov 2011, 10:34

4 km NE of Matsudo, Japan

A magnitude 5 mwc earthquake at 82.5 km depth.

Depth82.5 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated22 December 2025Latest timestamp stored in this record

Published location

Where is 4 km NE of Matsudo, 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.

35.814000, 139.934000

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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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Catalog fields and provenance
Event ID
usp000ja9j
Coordinates
35.814, 139.934
Network
us
Significance
462