QQuakeFacts
USGS usp000hvny

11 Mar 2011, 05:59

78 km E of Iwaki, Japan

A magnitude 5.9 mb earthquake at 8.4 km depth.

Depth8.4 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated8 April 2022Latest timestamp stored in this record

Published location

Where is 78 km E of Iwaki, 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.

37.054000, 141.763000

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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
usp000hvny
Coordinates
37.054, 141.763
Network
us
Significance
536