QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem788955
USGS iscgem788955
6 Dec 1970, 21:20
64 km SSE of Hiroo, Japan
A magnitude 6.5 mw earthquake at 39.7 km depth.
Published location
Where is 64 km SSE of Hiroo, 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.
41.775000, 143.686000
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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
iscgem788955
Coordinates
41.775, 143.686
Network
iscgem
Significance
652