QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0004ycu
USGS usp0004ycu

26 Oct 1991, 03:27

Pagan region, Northern Mariana Islands

A magnitude 6 mwb earthquake at 192 km depth.

Depth192 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated28 April 2022Latest timestamp stored in this record

Published location

Where is Pagan region, Northern Mariana Islands?

This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.

18.506000, 145.668000

Open the interactive map ↗

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.

Need a current safety answer?

Use local emergency authorities and the live USGS event page. This historical evidence page is not an alert service.

Open the USGS event →

Continue exploring

Nearby events with a similar magnitude

M 6

Alamagan region, Northern Mariana Islands

M 6

Pagan region, Northern Mariana Islands

M 6

Volcano Islands, Japan region

M 6

Maug Islands region, Northern Mariana Islands

M 6

Mariana Islands region

M 6

Pagan region, Northern Mariana Islands

Catalog fields and provenance
Event ID
usp0004ycu
Coordinates
18.506, 145.668
Network
us
Significance
554