Overall Green Earthquake alert in United States on 23 Jan 2018 09:31 UTC

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

M 7.9 in United States on 23 Jan 2018 09:31 UTC

2018-01-23 11:16 message from NTWC

Key information extracted from original GTS message :

Evaluation

Note revised earthquake magnitude
An earthquake with a preliminary magnitude of 7.9 occurred in the gulf of alaska at 0932 UTC on tuesday JANUARY 23 2018
There is no TSUNAMI threat for areas covered under this bulletin
Recommended actions
Remain observant and exercise normal caution near the sea

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)
Dart 46403	52.6	-156.9	10: 24	0.03	08
Dart 46410	57.6	-143.8	10: 08	0.04	06
Dart 46409	55.3	-148.5	09: 44	0.12	04

Measurements Levels

SOURCE	GAUGE LOCATION	LAT	LON	TIME (UTC)	HEIGHT (m)	PERIOD (min)
PTWC	Dart 46403	52.6	-156.9	10: 24	0.03	08
PTWC	Dart 46410	57.6	-143.8	10: 08	0.04	06
PTWC	Dart 46409	55.3	-148.5	09: 44	0.12	04

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