QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem906631
USGS iscgem906631
16 Feb 1931, 18:48
53 km E of Shizunai-furukawach?, Japan
A magnitude 6.3 mw earthquake at 25 km depth.
Published location
Where is 53 km E 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.
42.259000, 143.008000
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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
iscgem906631
Coordinates
42.259, 143.008
Network
iscgem
Significance
616