QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgemsup610548660
USGS iscgemsup610548660
17 Sept 1906, 04:16
73 km S of Shimoda, Japan
A magnitude 6.4 mw earthquake at 20 km depth.
Published location
Where is 73 km S of Shimoda, 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.
34.021000, 138.834000
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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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Catalog fields and provenance
Event ID
iscgemsup610548660
Coordinates
34.021, 138.834
Network
iscgemsup
Significance
626