QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/us1000btna
USGS us1000btna
20 Dec 2017, 13:40
104 km E of Nishinoomote, Japan
A magnitude 5.5 mww earthquake at 10 km depth.
Published location
Where is 104 km E of Nishinoomote, 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.
30.615400, 132.077900
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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
us1000btna
Coordinates
30.6154, 132.0779
Network
us
Significance
466