QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem909273
USGS iscgem909273
22 May 1927, 23:32
31 km SSW of Wuwei, China
A magnitude 7.7 mw earthquake at 15 km depth.
Published location
Where is 31 km SSW of Wuwei, 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.
37.666000, 102.493000
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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
iscgem909273
Coordinates
37.666, 102.493
Network
iscgem
Significance
912