QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem911499
USGS iscgem911499
12 Aug 1923, 07:10
282 km SE of Katsuura, Japan
A magnitude 6.4 mw earthquake at 15 km depth.
Published location
Where is 282 km SE of Katsuura, 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.
33.381000, 142.521000
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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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Catalog fields and provenance
Event ID
iscgem911499
Coordinates
33.381, 142.521
Network
iscgem
Significance
622