QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem902525
USGS iscgem902525

10 Jun 1938, 10:53

35 km N of Hirara, Japan

A magnitude 7.7 mw earthquake at 20 km depth.

Depth20 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated25 April 2022Latest timestamp stored in this record

Published location

Where is 35 km N of Hirara, 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.

25.125000, 125.308000

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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 7.5

38 km SW of Yonakuni, Japan

M 7.32

120 km ENE of Hirara, Japan

M 7.3

92 km NNW of Yonakuni, Japan

M 8.1

1910 Taiwan Earthquake

M 7.21

98 km SSW of Ishigaki, Japan

M 7.15

68 km NNE of Ishigaki, Japan

Catalog fields and provenance
Event ID
iscgem902525
Coordinates
25.125, 125.308
Network
iscgem
Significance
903