QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem780560
USGS iscgem780560
24 Sept 1971, 02:10
119 km E of Yamada, Japan
A magnitude 6.3 mw earthquake at 21 km depth.
Published location
Where is 119 km E 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.
39.380000, 143.331000
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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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Catalog fields and provenance
Event ID
iscgem780560
Coordinates
39.38, 143.331
Network
iscgem
Significance
613