QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem822260
USGS iscgem822260
17 May 1968, 17:02
191 km SSE of Hiroo, Japan
A magnitude 6.4 mw earthquake at 13.5 km depth.
Published location
Where is 191 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.
40.645000, 144.076000
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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
iscgem822260
Coordinates
40.645, 144.076
Network
iscgem
Significance
628