QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgemsup889513
USGS iscgemsup889513
11 May 1955, 12:04
42 km SE of Cayambe, Ecuador
A magnitude 6.5 mw earthquake at 15 km depth.
Published location
Where is 42 km SE of Cayambe, Ecuador?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
-0.230000, -77.878000
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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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Use local emergency authorities and the live USGS event page. This historical evidence page is not an alert service.
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Catalog fields and provenance
Event ID
iscgemsup889513
Coordinates
-0.23, -77.878
Network
iscgemsup
Significance
646