QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000205b
USGS usp000205b
30 Nov 1983, 02:56
69 km SSE of Shizunai-furukawach?, Japan
A magnitude 6 mw earthquake at 56.9 km depth.
Published location
Where is 69 km SSE of Shizunai-furukawach?, 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.
41.790000, 142.772000
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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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Nearby events with a similar magnitude
Catalog fields and provenance
Event ID
usp000205b
Coordinates
41.79, 142.772
Network
us
Significance
554