QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem912238
USGS iscgem912238
21 May 1921, 23:26
211 km S of Severo-Kuril’sk, Russia
A magnitude 6.5 mw earthquake at 35 km depth.
Published location
Where is 211 km S of Severo-Kuril’sk, Russia?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
48.807000, 155.588000
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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
iscgem912238
Coordinates
48.807, 155.588
Network
iscgem
Significance
654