QQuakeFacts
USGS us1000gfej

22 Aug 2018, 16:06

104 km S of Shizunai-furukawach?, Japan

A magnitude 5 mb earthquake at 41.3 km depth.

Depth41.3 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated22 December 2025Latest timestamp stored in this record

Published location

Where is 104 km S of Shizunai-furukawach?, 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.

41.402500, 142.543800

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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
us1000gfej
Coordinates
41.4025, 142.5438
Network
us
Significance
386