QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem913585
USGS iscgem913585
29 Jul 1917, 15:32
123 km SE of Honchō, Japan
A magnitude 7.1 mw earthquake at 15 km depth.
Published location
Where is 123 km SE of Honchō, 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.
41.208000, 143.747000
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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
iscgem913585
Coordinates
41.208, 143.747
Network
iscgem
Significance
778