QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem889372
USGS iscgem889372

28 Mar 1955, 09:12

Ryukyu Islands, Japan

A magnitude 6.3 mw earthquake at 51 km depth.

Depth51 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated26 April 2022Latest timestamp stored in this record

Published location

Where is Ryukyu Islands, 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.

29.093000, 130.109000

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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 6.32

197 km ESE of Naze, Japan

M 6.33

40 km ESE of Takanabe, Japan

M 6.31

111 km SE of Naze, Japan

M 6.34

Ryukyu Islands, Japan

M 6.3

25 km N of Uken, Japan

M 6.3

119 km E of Naze, Japan

Catalog fields and provenance
Event ID
iscgem889372
Coordinates
29.093, 130.109
Network
iscgem
Significance
614