QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/iscgem884971
USGS iscgem884971

17 Aug 1958, 19:01

193 km N of Madang, Papua New Guinea

A magnitude 6.3 mw earthquake at 20 km depth.

Depth20 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated26 April 2022Latest timestamp stored in this record

Published location

Where is 193 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.

-3.488000, 145.997000

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Map data © OpenStreetMap contributors

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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Nearby events with a similar magnitude

M 6.34

185 km ENE of Angoram, Papua New Guinea

M 6.33

49 km E of Lae, Papua New Guinea

M 6.33

181 km N of Madang, Papua New Guinea

M 6.35

190 km SSW of Lorengau, Papua New Guinea

M 6.33

72 km NNE of Wabag, Papua New Guinea

M 6.36

74 km NW of Lae, Papua New Guinea

Catalog fields and provenance
Event ID
iscgem884971
Coordinates
-3.488, 145.997
Network
iscgem
Significance
618