QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp00047a7
USGS usp00047a7
31 Mar 1990, 20:31
102 km S of Shikotan, Russia
A magnitude 6 mw earthquake at 21 km depth.
Published location
Where is 102 km S of Shikotan, 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.
42.891000, 146.969000
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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
usp00047a7
Coordinates
42.891, 146.969
Network
us
Significance
554