QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000hvpa
USGS usp000hvpa

11 Mar 2011, 06:15

47 km E of ?arai, Japan

A magnitude 7.9 mwc earthquake at 42.6 km depth.

Depth42.6 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated14 June 2023Latest timestamp stored in this record

Published location

Where is 47 km E of ?arai, 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.

36.281000, 141.111000

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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 7.9

174 km SE of Katsuura, Japan

M 7.85

5 km E of Tateyama, Japan

M 7.96

5 km SSE of ?iso, Japan

M 7.8

105 km E of Iwaki, Japan

M 7.7

69 km ESE of Kitaibaraki, Japan

M 7.7

116 km ESE of Namie, Japan

Catalog fields and provenance
Event ID
usp000hvpa
Coordinates
36.281, 141.111
Network
us
Significance
1155