QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem888741
USGS iscgem888741
30 Sept 1956, 00:20
4 km S of Shisui, Japan
A magnitude 6.3 mw earthquake at 66.1 km depth.
Published location
Where is 4 km S of Shisui, 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.
35.677000, 140.259000
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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
iscgem888741
Coordinates
35.677, 140.259
Network
iscgem
Significance
611