QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0001w81
USGS usp0001w81

21 Jun 1983, 07:25

122 km WNW of Shimokizukuri, Japan

A magnitude 6.7 mw earthquake at 9.9 km depth.

Depth9.9 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated19 December 2025Latest timestamp stored in this record

Published location

Where is 122 km WNW of Shimokizukuri, 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.

41.346000, 139.099000

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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 6.7

19 km S of Shizunai-furukawach?, Japan

M 6.7

41 km NNE of Miyako, Japan

M 6.67

45 km E of Mutsu, Japan

M 6.73

65 km ESE of Onagawa Chō, Japan

M 6.74

118 km ENE of Namie, Japan

M 6.76

62 km SE of Kamaishi, Japan

Catalog fields and provenance
Event ID
usp0001w81
Coordinates
41.346, 139.099
Network
us
Significance
691