QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem895549
USGS iscgem895549
27 Jun 1950, 16:41
49 km W of Iwanai, Japan
A magnitude 6.6 mw earthquake at 15 km depth.
Published location
Where is 49 km W of Iwanai, 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.
42.931000, 139.902000
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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
iscgem895549
Coordinates
42.931, 139.902
Network
iscgem
Significance
666