Overall Green Earthquake alert in Taiwan on 22 Apr 2024 18:26 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 6.1 in Taiwan on 22 Apr 2024 18:26 UTC

Global Telecommunication Service

GTS (Global Telecommunication Service) is the official Warning and Alerting channel by the World Meteorological Organization (WMO) adopted by several Warning Organizations. As soon as a new GTS message regarding Tropical Cyclones(WT) or Tsunami(WE) the messages are processed and possibly assigned to the specific event. When a new GTS message is present an new tab in the specific event report page is present.The presence of a GTS message is shown in the homepage with a dedicated icon.

Click on the messages list to visualize on the right the detailed text.

Measurements Levels

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

22/04 18:54 WEAK53PAAQ221852

22/04 18:47 WEGM42PHEB221845

22/04 18:47 WEZS42PHEB221845

22/04 18:45 WEHW42PHEB221844

22/04 18:45 WEPA42PHEB221844

22/04 18:37 WEPA40RJTD221837

22/04 18:33 WEPA40RJTD221833

2024-04-22 18:54 message from NTWC link

Key information extracted from original GTS message :

Evaluation

There is no TSUNAMI danger for the u s west coast BRITISH columbia or alaska
Based on earthquake information and historic TSUNAMI records the earthquake is not expected to generate a tsunami
An earthquake has occurred with parameters listed below
Preliminary earthquake parameters
The following parameters are based on a rapid preliminary assessment of the earthquake and changes MAY occur
Magnitude 6.6
Origin time 1027 akdt apr 22.2024 1127 pdt apr 22 2024 1827 UTC apr 22
Coordinates 23.8 north 121 6 east
Depth 6 miles
Location near TAIWAN additional information and next update
Refer to the internet site tsunami
Gov for more information
Pacific coastal regions outside california oregon washington BRITISH columbia and alaska should refer to the pacific TSUNAMI warning center messages at tsunami
Gov
This will be the only u s national TSUNAMI warning center message issued for this event unless additional information becomes available

Original Message :

WEAK53 PAAQ 221852
TIBAK1

Tsunami Information Statement Number 1
NWS National Tsunami Warning Center Palmer AK
1152 AM PDT Mon Apr 22 2024

...THIS IS A TSUNAMI INFORMATION STATEMENT FOR ALASKA, BRITISH
COLUMBIA, WASHINGTON, OREGON AND CALIFORNIA...

EVALUATION
----------
* There is no tsunami danger for the U.S. West Coast, British
Columbia, or Alaska.

* Based on earthquake information and historic tsunami records,
the earthquake is not expected to generate a tsunami.

* An earthquake has occurred with parameters listed below.

PRELIMINARY EARTHQUAKE PARAMETERS
---------------------------------

* The following parameters are based on a rapid preliminary
assessment of the earthquake and changes may occur.

* Magnitude 6.6
* Origin Time 1027 AKDT Apr 22 2024
1127 PDT Apr 22 2024
1827 UTC Apr 22 2024
* Coordinates 23.8 North 121.6 East
* Depth 6 miles
* Location near Taiwan

ADDITIONAL INFORMATION AND NEXT UPDATE
--------------------------------------
* Refer to the internet site tsunami.gov for more information.

* Pacific coastal regions outside California, Oregon, Washington,
British Columbia, and Alaska should refer to the Pacific Tsunami
Warning Center messages at tsunami.gov.

* This will be the only U.S. National Tsunami Warning Center
message issued for this event unless additional information
becomes available.

$$

2024-04-22 18:47 message from NTWC link

Key information extracted from original GTS message :

Evaluation

An earthquake with a preliminary magnitude of 6.6 occurred in TAIWAN at 427 am chst on tuesday APRIL 23 2024
Based on all available data there is no TSUNAMI threat to guam rota tinian or saipan from this earthquake

Original Message :

WEGM42 PHEB 221845
TIBGUM

GUZ001>004-222045-

TSUNAMI INFORMATION STATEMENT NUMBER 1
NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
445 AM CHST TUE APR 23 2024

...NO TSUNAMI THREAT TO GUAM/CNMI FROM A DISTANT EARTHQUAKE...

AUDIENCE
--------
EMERGENCY MANAGERS... MEDIA... GENERAL PUBLIC

EVALUATION
----------

* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 6.6 OCCURRED IN
TAIWAN AT 427 AM CHST ON TUESDAY APRIL 23 2024.

* BASED ON ALL AVAILABLE DATA... THERE IS NO TSUNAMI THREAT TO
GUAM... ROTA... TINIAN OR SAIPAN FROM THIS EARTHQUAKE.

RECOMMENDED ACTIONS
-------------------

* NO ACTION IS REQUIRED.

POTENTIAL IMPACTS
-----------------

* NO TSUNAMI IMPACTS ARE EXPECTED.

PRELIMINARY EARTHQUAKE PARAMETERS
---------------------------------

* MAGNITUDE 6.6
* ORIGIN TIME 427 AM CHST APR 23 2024
* COORDINATES 23.8 NORTH 121.6 EAST
* DEPTH 6 MILES
* LOCATION TAIWAN

NEXT UPDATE AND ADDITIONAL INFORMATION
--------------------------------------

* THIS WILL BE THE ONLY STATEMENT ISSUED FOR THIS EVENT UNLESS
ADDITIONAL DATA ARE RECEIVED OR THE SITUATION CHANGES.

* FURTHER INFORMATION ABOUT THIS EVENT MAY BE FOUND ON THE
INTERNET AT WWW.TSUNAMI.GOV.

* AUTHORITATIVE INFORMATION ABOUT THE EARTHQUAKE FROM THE U.S.
GEOLOGICAL SURVEY CAN BE FOUND ON THE INTERNET AT
EARTHQUAKE.USGS.GOV.

$$

2024-04-22 18:47 message from NTWC link

Key information extracted from original GTS message :

Evaluation

An earthquake with a preliminary magnitude of 6.6 occurred in TAIWAN at 727 am sst on monday APRIL 22 2024
Based on all available data there is no TSUNAMI threat to AMERICAN SAMOA from this earthquake

Original Message :

WEZS42 PHEB 221845
TIBPPG

ASZ001>004-222045-

TSUNAMI INFORMATION STATEMENT NUMBER 1
NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
745 AM SST MON APR 22 2024

...NO TSUNAMI THREAT FROM A DISTANT EARTHQUAKE...

AUDIENCE
--------
EMERGENCY MANAGERS... MEDIA... GENERAL PUBLIC

EVALUATION
----------

* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 6.6 OCCURRED IN
TAIWAN AT 727 AM SST ON MONDAY APRIL 22 2024.

* BASED ON ALL AVAILABLE DATA... THERE IS NO TSUNAMI THREAT TO
AMERICAN SAMOA FROM THIS EARTHQUAKE.

RECOMMENDED ACTIONS
-------------------

* NO ACTION IS REQUIRED.

POTENTIAL IMPACTS
-----------------

* NO TSUNAMI IMPACTS ARE EXPECTED.

PRELIMINARY EARTHQUAKE PARAMETERS
---------------------------------

* MAGNITUDE 6.6
* ORIGIN TIME 727 AM SST APR 22 2024
* COORDINATES 23.8 NORTH 121.6 EAST
* DEPTH 6 MILES
* LOCATION TAIWAN

NEXT UPDATE AND ADDITIONAL INFORMATION
--------------------------------------

* THIS WILL BE THE ONLY STATEMENT ISSUED FOR THIS EVENT UNLESS
ADDITIONAL DATA ARE RECEIVED OR THE SITUATION CHANGES.

* FURTHER INFORMATION ABOUT THIS EVENT MAY BE FOUND ON THE
INTERNET AT WWW.TSUNAMI.GOV.

* AUTHORITATIVE INFORMATION ABOUT THE EARTHQUAKE FROM THE U.S.
GEOLOGICAL SURVEY CAN BE FOUND ON THE INTERNET AT
EARTHQUAKE.USGS.GOV.

$$

2024-04-22 18:45 message from NTWC link

Key information extracted from original GTS message :

Evaluation

Based on all available data a destructive pacific-wide TSUNAMI is not expected and there is no TSUNAMI threat to hawaii
Repeat
A destructive pacific-wide TSUNAMI is not expected and there is no TSUNAMI threat to hawaii
This will be the only statement issued for this event unless additional data are received

Original Message :

WEHW42 PHEB 221844
TIBHWX

HIZ001-003-006>007-009-016>018-023-026-029>035-037>050-051>054-
222044-

TSUNAMI INFORMATION STATEMENT NUMBER 1
NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
844 AM HST MON APR 22 2024

TO - EMERGENCY MANAGEMENT IN THE STATE OF HAWAII

SUBJECT - TSUNAMI INFORMATION STATEMENT

THIS STATEMENT IS FOR INFORMATION ONLY. NO ACTION REQUIRED.

AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

ORIGIN TIME - 0827 AM HST 22 APR 2024
COORDINATES - 23.8 NORTH 121.6 EAST
LOCATION - TAIWAN
MAGNITUDE - 6.6 MOMENT

EVALUATION

BASED ON ALL AVAILABLE DATA A DESTRUCTIVE PACIFIC-WIDE TSUNAMI IS
NOT EXPECTED AND THERE IS NO TSUNAMI THREAT TO HAWAII. REPEAT. A
DESTRUCTIVE PACIFIC-WIDE TSUNAMI IS NOT EXPECTED AND THERE IS NO
TSUNAMI THREAT TO HAWAII.

THIS WILL BE THE ONLY STATEMENT ISSUED FOR THIS EVENT UNLESS
ADDITIONAL DATA ARE RECEIVED.

$$

2024-04-22 18:45 message from NTWC link

Key information extracted from original GTS message :

Evaluation

An earthquake with a preliminary magnitude of 6.6 occurred in TAIWAN at 1827 UTC on monday APRIL 22 2024
Based on all available data there is no TSUNAMI threat from this earthquake

Original Message :

WEPA42 PHEB 221844
TIBPAC

TSUNAMI INFORMATION STATEMENT NUMBER 1
NWS PACIFIC TSUNAMI WARNING CENTER HONOLULU HI
1844 UTC MON APR 22 2024

...PTWC TSUNAMI INFORMATION STATEMENT...

**** NOTICE **** NOTICE **** NOTICE **** NOTICE **** NOTICE *****

THIS STATEMENT IS ISSUED FOR INFORMATION ONLY IN SUPPORT OF THE
UNESCO/IOC PACIFIC TSUNAMI WARNING AND MITIGATION SYSTEM AND IS
MEANT FOR NATIONAL AUTHORITIES IN EACH COUNTRY OF THAT SYSTEM.

NATIONAL AUTHORITIES WILL DETERMINE THE APPROPRIATE LEVEL OF
ALERT FOR EACH COUNTRY AND MAY ISSUE ADDITIONAL OR MORE REFINED
INFORMATION.

**** NOTICE **** NOTICE **** NOTICE **** NOTICE **** NOTICE *****

PRELIMINARY EARTHQUAKE PARAMETERS - FROM JMA
--------------------------------------------

* MAGNITUDE 6.6
* ORIGIN TIME 1827 UTC APR 22 2024
* COORDINATES 23.8 NORTH 121.6 EAST
* DEPTH 10 KM / 6 MILES
* LOCATION TAIWAN

EVALUATION
----------

* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 6.6 OCCURRED IN
TAIWAN AT 1827 UTC ON MONDAY APRIL 22 2024.

* BASED ON ALL AVAILABLE DATA... THERE IS NO TSUNAMI THREAT
FROM THIS EARTHQUAKE.

RECOMMENDED ACTIONS
-------------------

* NO ACTION IS REQUIRED.

NEXT UPDATE AND ADDITIONAL INFORMATION
--------------------------------------

* THIS WILL BE THE ONLY STATEMENT ISSUED FOR THIS EVENT UNLESS
ADDITIONAL DATA ARE RECEIVED OR THE SITUATION CHANGES.

* AUTHORITATIVE INFORMATION ABOUT THE EARTHQUAKE FROM THE U.S.
GEOLOGICAL SURVEY CAN BE FOUND ON THE INTERNET AT
EARTHQUAKE.USGS.GOV.

* FURTHER INFORMATION ABOUT THIS EVENT MAY BE FOUND AT
WWW.TSUNAMI.GOV.

* COASTAL REGIONS OF HAWAII... AMERICAN SAMOA... GUAM... AND
CNMI SHOULD REFER TO PACIFIC TSUNAMI WARNING CENTER MESSAGES
SPECIFICALLY FOR THOSE PLACES THAT CAN BE FOUND AT
WWW.TSUNAMI.GOV.

* COASTAL REGIONS OF CALIFORNIA... OREGON... WASHINGTON...
BRITISH COLUMBIA AND ALASKA SHOULD ONLY REFER TO U.S.
NATIONAL TSUNAMI WARNING CENTER MESSAGES THAT CAN BE FOUND
AT WWW.TSUNAMI.GOV.

$$

2024-04-22 18:37 message from JMA link

Key information extracted from original GTS message :

Evaluation

There is a very small possibility of a destructive local TSUNAMI

Original Message :

WEPA40 RJTD 221837
TSUNAMI BULLETIN NUMBER 001
ISSUED BY NWPTAC(JMA)
ISSUED AT 1837Z 22 APR 2024
PART 01 OF 01 PARTS

HYPOCENTRAL PARAMETERS
ORIGIN TIME:1826Z 22 APR 2024
PRELIMINARY EPICENTER:LAT23.8NORTH LON121.6EAST
TAIWAN
TAIWAN
MAG:6.6 (MJMA)

EVALUATION
THERE IS A VERY SMALL POSSIBILITY OF A DESTRUCTIVE LOCAL TSUNAMI

THIS BULLETIN IS FOR
TAIWAN

ESTIMATED TSUNAMI ARRIVAL TIMES AND WAVE AMPLITUDES
TAIWAN
LOCATION COORDINATES ARRIVAL TIME AMPL
HUALIEN 24.0N 121.6E 1829Z 22 APR 0.3-1M

AMPL - MAXIMUM AMPLITUDE IN METERS FROM THE
UNDISTURBED SEA LEVEL TO THE CREST

IN SOME COASTAL AREAS (PARTICULARLY NEAR THE EPICENTER),
TSUNAMI WAVES MAY BE HIGHER AND/OR ARRIVE EARLIER THAN
ESTIMATED FOR NEARBY FORECAST POINTS.
AUTHORITIES SHOULD BE AWARE OF THIS POSSIBILITY.

THE EVALUATION OF TSUNAMIGENIC POTENTIAL AND ESTIMATED
ARRIVAL TIMES FOR TSUNAMI WAVES MAY ALSO DIFFER FROM
THOSE OF PTWC DUE TO DIFFERENCES IN ESTIMATED EARTHQUAKE
PARAMETERS AND THE TSUNAMI FORECAST MODEL.
AUTHORITIES SHOULD REFER TO EARLIER ARRIVAL TIMES
FOR GREATEST SAFETY.

THIS WILL BE THE FINAL BULLETIN UNLESS CHANGES IN THE POTENTIAL
FOR TSUNAMI GENERATION ARE DEEMED POSSIBLE BASED ON EARTHQUAKE
RE-EVALUATION OR REPORTS INDICATING TSUNAMI OBSERVATION ARE
RECEIVED.

=

2024-04-22 18:33 message from JMA link

Original Message :

WEPA40 RJTD 221833
TSUNAMI BULLETIN ISSUED BY JMA AT 1833Z 22 APR

ORIGIN TIME 1826Z 22 APR
PRELIMINARY EPICENTER LAT 23.8 N. LON 121.6 E.
TAIWAN REGION
FOCAL DEPTH 0 KM MAG 6.6

NO SIGNIFICANT TSUNAMI IS EXPECTED IN COASTAL AREAS OF JAPAN
NO FURTHER ACTION WILL BE TAKEN=

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