QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000012y
USGS usp000012y
26 Mar 1973, 03:37
104 km S of Ishigaki, Japan
A magnitude 6 ms earthquake at 16 km depth.
Published location
Where is 104 km S of Ishigaki, 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.
23.415000, 123.957000
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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
usp000012y
Coordinates
23.415, 123.957
Network
us
Significance
554