Overall Orange Earthquake in Russia on 18 Sep 2025 18:58 UTC

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve awareness, information exchange and coordination in the first phase after major sudden-onset disasters.

M 7.8 Earthquake and Tsunami (1.9 m) in Russia on 18 Sep 2025 18:58 UTC

2025-09-18 21:38 message from NTWC

Key information extracted from original GTS message :

Evaluation

An earthquake with a preliminary magnitude of 7.8 occurred off the east coast of kamchatka RUSSIA at 1858 UTC on thursday SEPTEMBER 18 2025
Based on all available data the TSUNAMI threat from this earthquake has now passed

Tsunami Observations

The following are tsunami wave observations from coastal and/or deep-ocean sea level gauges at the indicated locations the maximum tsunami height is measured with respect to the normal tide level

GAUGE LOCATION	LAT	LON	TIME (UTC)	HEIGHT (m)	PERIOD (min)
Amchitka Ak	51.4	179.3	21: 25	0.04	14
Dart 21414	49	178.2	20: 46	0.05	10
Dart 21415	50.2	171.9	20: 10	0.06	08

Measurements Levels

SOURCE	GAUGE LOCATION	LAT	LON	TIME (UTC)	HEIGHT (m)	PERIOD (min)
PTWC	Amchitka Ak	51.4	179.3	21: 25	0.04	14
PTWC	Dart 21414	49	178.2	20: 46	0.05	10
PTWC	Dart 21415	50.2	171.9	20: 10	0.06	08

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