QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/us1000gj78
USGS us1000gj78

28 Aug 2018, 23:35

211 km NNE of Saipan, Northern Mariana Islands

A magnitude 6.4 mww earthquake at 55 km depth.

Depth55 kmPublished hypocentral depth
Tsunami flagFlaggedUSGS catalog flag, not a current warning
Updated3 May 2022Latest timestamp stored in this record

Published location

Where is 211 km NNE of Saipan, 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.

16.804400, 146.839500

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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 6.4

46 km ENE of Yigo Village, Guam

M 6.5

112 km NE of Saipan, Northern Mariana Islands

M 6.5

248 km N of Saipan, Northern Mariana Islands

M 6.5

49 km N of Yigo Village, Guam

M 6.5

114 km SSE of San Jose Village, Northern Mariana Islands

M 6.3

242 km N of Saipan, Northern Mariana Islands

Catalog fields and provenance
Event ID
us1000gj78
Coordinates
16.8044, 146.8395
Network
us
Significance
649