QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000347p
USGS usp000347p
17 Apr 1987, 02:03
97 km S of Kurchatov, Kazakhstan
A magnitude 6 mb earthquake at 0 km depth.
Published location
Where is 97 km S of Kurchatov, Kazakhstan?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
49.886000, 78.691000
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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
usp000347p
Coordinates
49.886, 78.691
Network
us
Significance
554