QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000j194
USGS usp000j194
9 May 2011, 21:15
199 km ESE of Onagawa Ch?, Japan
A magnitude 5.6 mwc earthquake at 11 km depth.
Published location
Where is 199 km ESE of Onagawa Ch?, 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.
37.739000, 143.536000
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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
usp000j194
Coordinates
37.739, 143.536
Network
us
Significance
482