QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000j0c4
USGS usp000j0c4
21 Apr 2011, 14:47
4 km E of Asahi, Japan
A magnitude 5.1 mb earthquake at 35 km depth.
Published location
Where is 4 km E of Asahi, 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.
35.712000, 140.696000
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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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Nearby events with a similar magnitude
Catalog fields and provenance
Event ID
usp000j0c4
Coordinates
35.712, 140.696
Network
us
Significance
400