QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem778871
USGS iscgem778871
27 Nov 1971, 13:45
102 km NE of Tatsugō, Japan
A magnitude 6.2 mw earthquake at 47.7 km depth.
Published location
Where is 102 km NE of Tatsugō, 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.
29.176000, 130.248000
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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
iscgem778871
Coordinates
29.176, 130.248
Network
iscgem
Significance
582