QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem886386
USGS iscgem886386
14 Apr 1957, 08:11
157 km NNW of Saga, China
A magnitude 6.4 mw earthquake at 15 km depth.
Published location
Where is 157 km NNW of Saga, China?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
30.521000, 84.348000
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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
iscgem886386
Coordinates
30.521, 84.348
Network
iscgem
Significance
636