QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem903180
USGS iscgem903180
26 Jul 1937, 20:56
42 km E of Onagawa Ch?, Japan
A magnitude 6.6 mw earthquake at 35 km depth.
Published location
Where is 42 km E of Onagawa Ch?, 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.
38.387000, 141.925000
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
iscgem903180
Coordinates
38.387, 141.925
Network
iscgem
Significance
678