QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem904020
USGS iscgem904020
4 Jan 1935, 14:41
9 km WNW of Marmara, Turkey
A magnitude 6.3 mw earthquake at 15 km depth.
Published location
Where is 9 km WNW of Marmara, Turkey?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
40.620000, 27.451000
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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
iscgem904020
Coordinates
40.62, 27.451
Network
iscgem
Significance
618