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USGS iscgem818662

5 Jul 1968, 12:28

68 km E of Onagawa Chō, Japan

A magnitude 6.3 mw earthquake at 39.1 km depth.

Depth39.1 kmPublished hypocentral depth

Tsunami flagNot flaggedUSGS catalog flag, not a current warning

Updated19 December 2025Latest timestamp stored in this record

Published location

Where is 68 km E of Onagawa Chō, 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.

38.497000, 142.230000

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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

93 km E of Ishinomaki, Japan

85 km W of Noshiro, Japan

37 km E of Miyako, Japan

30 km NNE of Namie, Japan

103 km E of Namie, Japan

47 km SE of Kamaishi, Japan

Catalog fields and provenance

Event ID

iscgem818662

Coordinates

38.497, 142.23

Network

iscgem

Significance

611