QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem913790
USGS iscgem913790
21 Apr 1916, 11:31
208 km SE of Katsuura, Japan
A magnitude 7 mw earthquake at 15 km depth.
Published location
Where is 208 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.
33.700000, 141.759000
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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
iscgem913790
Coordinates
33.7, 141.759
Network
iscgem
Significance
756