QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem912297
USGS iscgem912297
22 Aug 1921, 05:05
1 km NW of Asaka, Japan
A magnitude 6 mw earthquake at 35 km depth.
Published location
Where is 1 km NW of Asaka, 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.
35.816000, 139.589000
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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
iscgem912297
Coordinates
35.816, 139.589
Network
iscgem
Significance
559