Data last collected:
QuakeFactsEvidence report · prepared 6 October 2026https://quakes99.com/entity/iscgem888741
USGS iscgem888741
30 Sept 1956, 00:20
4 km S of Shisui, Japan
A magnitude 6.3 mw earthquake at 66.1 km depth.
Published location
Where is 4 km S of Shisui, 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.
35.677000, 140.259000
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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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Catalog fields and provenance
Event ID
iscgem888741
Coordinates
35.677, 140.259
Network
iscgem
Significance
611
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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 4 km S of Shisui, Japan earthquake: magnitude 6.3 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.