QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0001uvt
USGS usp0001uvt
30 Apr 1983, 15:03
150 km SE of Shizunai-furukawach?, Japan
A magnitude 6.5 mb earthquake at 30.4 km depth.
Published location
Where is 150 km SE of Shizunai-furukawach?, 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.
41.473000, 143.764000
Open the interactive map ↗Map data © OpenStreetMap contributors
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.
Continue exploring
Nearby events with a similar magnitude
Catalog fields and provenance
Event ID
usp0001uvt
Coordinates
41.473, 143.764
Network
us
Significance
650