QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem906933
USGS iscgem906933
10 Aug 1931, 22:18
172 km SE of Altay, China
A magnitude 7.9 mw earthquake at 10 km depth.
Published location
Where is 172 km SE of Altay, 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.
46.858000, 89.888000
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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
iscgem906933
Coordinates
46.858, 89.888
Network
iscgem
Significance
960