QuakeFactsEvidence report · prepared 3 September 2026https://quakes99.com/entity/iscgemsup914045
USGS iscgemsup914045
23 Mar 1913, 20:47
Volcano Islands, Japan region
A magnitude 7.1 mB earthquake at 360 km depth.
Published location
Where is Volcano Islands, Japan region?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
22.207000, 142.453000
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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.
Need a current safety answer?
Use local emergency authorities and the live USGS event page. This historical evidence page is not an alert service.
Catalog fields and provenance
Event ID
iscgemsup914045
Coordinates
22.207, 142.453
Network
iscgemsup
Significance
776