QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/us20002ycy
USGS us20002ycy

18 Jul 2015, 14:20

35 km SSW of Adak, Alaska

A magnitude 5.1 mb earthquake at 49.6 km depth.

Depth49.6 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated27 July 2023Latest timestamp stored in this record

Published location

Where is 35 km SSW of Adak, Alaska?

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

51.565000, -176.779500

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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 5.1

109 km SSW of Adak, Alaska

M 5.1

62 km SW of Adak, Alaska

M 5.1

45 km ESE of Adak, Alaska

M 5.1

105 km SE of Atka, Alaska

M 5.1

76 km SSE of Atka, Alaska

M 5.1

39 km S of Adak, Alaska

Catalog fields and provenance
Event ID
us20002ycy
Coordinates
51.565, -176.7795
Network
us
Significance
400