QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000gwp9
USGS usp000gwp9
29 Apr 2009, 18:21
68 km SSE of Yonakuni, Japan
A magnitude 5.1 mwc earthquake at 32.6 km depth.
Published location
Where is 68 km SSE of Yonakuni, 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.
23.943000, 123.356000
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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
usp000gwp9
Coordinates
23.943, 123.356
Network
us
Significance
400