QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp00006sz
USGS usp00006sz

19 Jun 1974, 03:55

Southwest Indian Ridge

A magnitude 6.6 ms earthquake at 33 km depth.

Depth33 kmPublished hypocentral depth
Tsunami flagNot flaggedUSGS catalog flag, not a current warning
Updated19 December 2025Latest timestamp stored in this record

Published location

Where is Southwest Indian Ridge?

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

-33.416000, 56.875000

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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 6.66

Southwest Indian Ridge

M 6.46

South Indian Ocean

M 6.31

South Indian Ocean

M 6.2

South Indian Ocean

M 6.2

South Indian Ocean

M 6.16

South Indian Ocean

Catalog fields and provenance
Event ID
usp00006sz
Coordinates
-33.416, 56.875
Network
us
Significance
670