QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem910138
USGS iscgem910138
3 Oct 1926, 08:26
171 km ESE of Ishinomaki, Japan
A magnitude 6.3 mw earthquake at 25 km depth.
Published location
Where is 171 km ESE of Ishinomaki, 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.
37.727000, 143.045000
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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
iscgem910138
Coordinates
37.727, 143.045
Network
iscgem
Significance
605