Overall Green Earthquake alert in United States on 21 May 2023 18:44 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 5.54 in United States on 21 May 2023 18:44 UTC

2023-05-21 18:50 message from NTWC

Key information extracted from original GTS message :

Evaluation

An earthquake has occurred a TSUNAMI is not expected
Preliminary earthquake parameters
The following parameters are based on a rapid preliminary assessment of the earthquake and changes MAY occur
Magnitude 5.8
Origin time 1044 akdt MAY 21.2023 1144 pdt MAY 21 2023 1844 UTC MAY 21
Coordinates 40.4 north 125 3 west
Depth 3 miles
Location 65 miles sw of eureka california 235 miles nw of san francisco california additional information and next update
Further information will be issued by the UNITED STATES geological survey (earthquake
Usgs
Gov) or the appropriate regional seismic network
This will be the only u s national TSUNAMI warning center message issued for this event unless additional information becomes available

Measurements Levels

SOURCE	GAUGE LOCATION	LAT	LON	TIME (UTC)	HEIGHT (m)	PERIOD (min)

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