QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem818928
USGS iscgem818928

12 Jul 1968, 01:44

109 km E of Yamada, Japan

A magnitude 6 mw earthquake at 21.8 km depth.

Depth21.8 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated19 December 2025Latest timestamp stored in this record

Published location

Where is 109 km E of Yamada, 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.

39.548000, 143.218000

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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

127 km E of Miyako, Japan

M 6

137 km ESE of Yamada, Japan

M 6

168 km NE of Miyako, Japan

M 6

104 km ESE of ?tsuchi, Japan

M 6

124 km SE of Shizunai-furukawach?, Japan

M 6

69 km SSE of Shizunai-furukawach?, Japan

Catalog fields and provenance
Event ID
iscgem818928
Coordinates
39.548, 143.218
Network
iscgem
Significance
554