QQuakeFacts
QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0000usb
USGS usp0000usb

27 May 1978, 00:58

Volcano Islands, Japan region

A magnitude 6.8 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 Volcano Islands, Japan region?

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

24.274000, 142.661000

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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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Continue exploring

Nearby events with a similar magnitude

M 6.8

Volcano Islands, Japan region

M 6.78

Volcano Islands, Japan region

M 6.7

Bonin Islands, Japan region

M 6.9

Bonin Islands, Japan region

M 6.64

Volcano Islands, Japan region

M 6.58

Volcano Islands, Japan region

Catalog fields and provenance
Event ID
usp0000usb
Coordinates
24.274, 142.661
Network
us
Significance
711