QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp000231k
USGS usp000231k
27 Mar 1984, 21:06
63 km N of Madang, Papua New Guinea
A magnitude 6.5 mw earthquake at 27.6 km depth.
Published location
Where is 63 km N of Madang, Papua New Guinea?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
-4.647000, 145.805000
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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
usp000231k
Coordinates
-4.647, 145.805
Network
us
Significance
650