QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0000s8t
USGS usp0000s8t
28 Dec 1977, 02:45
144 km NE of Massawa, Eritrea
A magnitude 6.6 ms earthquake at 33 km depth.
Published location
Where is 144 km NE of Massawa, Eritrea?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
16.659000, 40.278000
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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
usp0000s8t
Coordinates
16.659, 40.278
Network
us
Significance
670