Data last collected:
QuakeFactsEvidence report · prepared 19 October 2026https://quakes99.com/entity/usp0001vmy
USGS usp0001vmy
26 May 1983, 03:59
83 km WNW of Noshiro, Japan
A magnitude 7.4 mw earthquake at 23.7 km depth.
Published location
Where is 83 km WNW of Noshiro, 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.
40.462000, 139.102000
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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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Nearby events with a similar magnitude
Catalog fields and provenance
Event ID
usp0001vmy
Coordinates
40.462, 139.102
Network
us
Significance
842
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Questions this evidence can answer
01What exactly is this record?
Use the name, place, date and identifiers above to confirm that you have the right 83 km WNW of Noshiro, Japan earthquake: magnitude 7.4 and depth | QuakeFacts record.
02What does the evidence establish?
Read the reported values with their units, coverage dates and source notes. Keep observed facts separate from estimates or interpretation.
03What should I verify next?
Follow the primary-source links and check the limitations before using this evidence for a decision, comparison or citation.
A closer look at 83 km WNW of Noshiro, Japan
Depth in another unit
The recorded event depth of 23.7 km is approximately 14.73 miles below the source reference surface. Depth alone does not describe damage or local hazard.
Interpreting the recorded coordinates
The published position for 83 km WNW of Noshiro, Japan is 40.462° north and 139.102° east. This expresses the source coordinates in hemispheres; it does not establish an entrance, public access or a safe route.