QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem886739
USGS iscgem886739
23 Jun 1957, 00:50
82 km SE of Biak, Indonesia
A magnitude 7.1 mw earthquake at 59.1 km depth.
Published location
Where is 82 km SE of Biak, Indonesia?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
-1.723000, 136.592000
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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
iscgem886739
Coordinates
-1.723, 136.592
Network
iscgem
Significance
776