QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/official20030925195006360_27
USGS official20030925195006360_27
25 Sept 2003, 20:50
2003 Tokachi-Oki Earthquake
A magnitude 8.2 mww earthquake at 27 km depth.
Published location
Where is 2003 Tokachi-Oki Earthquake?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
41.815000, 143.910000
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
official20030925195006360_27
Coordinates
41.815, 143.91
Network
official
Significance
1024