QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem892540
USGS iscgem892540
4 Mar 1952, 01:22
1952 Tokachi-Oki Earthquake
A magnitude 8.1 mw earthquake at 45 km depth.
Published location
Where is 1952 Tokachi-Oki Earthquake?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
42.084000, 143.899000
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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
iscgem892540
Coordinates
42.084, 143.899
Network
iscgem
Significance
1009