QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem893631
USGS iscgem893631
31 Oct 1952, 16:37
136 km ESE of Yamada, Japan
A magnitude 6.5 mw earthquake at 20 km depth.
Published location
Where is 136 km ESE 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.
39.118000, 143.466000
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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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Use local emergency authorities and the live USGS event page. This historical evidence page is not an alert service.
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Catalog fields and provenance
Event ID
iscgem893631
Coordinates
39.118, 143.466
Network
iscgem
Significance
640