QuakeFactsEvidence report · prepared 3 September 2026https://quakes99.com/entity/us1000gfzr
USGS us1000gfzr
23 Aug 2018, 12:13
Volcano Islands, Japan region
A magnitude 5 mb earthquake at 39.9 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.
23.078900, 143.979700
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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
us1000gfzr
Coordinates
23.0789, 143.9797
Network
us
Significance
385