QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem815712
USGS iscgem815712
7 Oct 1968, 21:49
20 km S of Urakawa, Japan
A magnitude 6.5 mw earthquake at 49.5 km depth.
Published location
Where is 20 km S of Urakawa, 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.
41.976000, 142.744000
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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
iscgem815712
Coordinates
41.976, 142.744
Network
iscgem
Significance
640