QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem889485
USGS iscgem889485

1 May 1955, 10:55

154 km E of Miyako, Japan

A magnitude 6.6 mw earthquake at 10 km depth.

Depth10 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated26 April 2022Latest timestamp stored in this record

Published location

Where is 154 km E of Miyako, 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.

39.729000, 143.741000

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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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Continue exploring

Nearby events with a similar magnitude

M 6.56

163 km ENE of Hachinohe, Japan

M 6.55

129 km S of Kushiro, Japan

M 6.57

122 km E of Hachinohe, Japan

M 6.59

227 km ESE of Ishinomaki, Japan

M 6.6

129 km S of Honchō, Japan

M 6.51

64 km SSE of Hiroo, Japan

Catalog fields and provenance
Event ID
iscgem889485
Coordinates
39.729, 143.741
Network
iscgem
Significance
662