The CENALT

Key dates of the French tsunami warning centre project

November 2005 : first international meeting on tsunami alert systems in the Mediterranean

April 2006 : CEA is requested by the ministry of the interior to implement a tsunami warning centre in the Mediterranean

November 2007 : France announces during ICG IV its decision to establish a warning centre for the Western Mediterranean

• 22nd September 2009 : signature of the agreement between the ministry of the interior and the ministry of sustainable development and CEA, SHOM and CNRS, tasking them to develop and implement the tsunami warning centre

• 1st July 2012 : tsunami warning centre is operational

FORMATION CENALT NOVEMBRE 2011

The CENALT :

- Warns French civil security authorities, within fifteen minutes of a potentially tsunamigenic event occurring in the West Mediterranean Sea or in the North Eastern Atlantic Ocean, transmitting pertinent parameters of the event

- Advises within 15 minutes NEAM candidate tsunami watch providers, national tsunami warning centres and tsunami focal points,

- Sends confirmation/ cancelation messages: latency related to the tide gauge data availability

The CENALT : national mandate and international objectives

Upgrade of tide gauges (SHOM)

.

Upgrade of 34 stations equipped with high sampling rate and real-time transmission

Direct connection to the CENALT through VPN

10 stations on GTS All data available on

IOC website

Secured operational network

Optimal cooperation between seismic station network operatorsCooperation in progress for tide gauge network operators

COGICMétéoFrance

GTS

GFZINMROAUCM

IGN

IPMA

INGVCTBTO

Private telecommunication network for data transmission and message dissemination

CENALT IN OPERATION

Monitoring Systems

Data processing detection, location

magnitudTsunami arrival time

and warning level

CENALTBruyères-le-Châtel

Validation, messages dissemination

By expert on duty 24h/24

Civil Protection

Tsunami alert to the public beaches, harbours evacuation

SeismicSeismic

Sea levalSea leval

15 mn10 mn5 mn2 mn 60 mnOPERATIONAL SINCE 1 JULY 2012

Sea levelGUITARGUITAR

Record, DisplayTsunami measurements

Calypso

Real-time Modeling

Cassiopée

Scsnarii Agregation

SeismologySEISCOMP3SEISCOMP3

DétectionLocalisationMagnitude

Échange de données

MessageDissemination

MARMOTMARMOT

(ligne COGIC, GTS, fax, email,)

Communication Tests,exercises

Tsunami arrival timeDetection capacities

MASCARETMASCARETRAPPORT_8HRAPPORT_8H

Seismic and sea level

monitoringAlertAlert Alert going onAlert going on AlertAlert

Reporting Reporting

Message15mn

SupplementaryMessage

End of Message

SupplementaryMessageTsunami

Mesaurement

T0+8hReport

T0+2jReport

InitialMessage

CENALT : SOFTWARE PROCESS

The CENALT, automatic detection and interactive processing

Earthquake detection in real time: time origin, association, automatic location, magnitude calculation

- Data and communications flow- Archiving of raw data- Data format conversion

Continuous sea-level data reception Historical events database

Continuous sea-level signal reception (Atlantic ocean, Channel, Mediterranean sea)

Estimation of tsunami arrival timesMap of arrival times for a given event

Network capability monitoring

Seismic detection delayEvent location accuracy

Sea level information delay

* From July 1st to October 19, 2012

CENALT Operation since July 1st 2012

CENALT Operation since July 1st 2012

1. Earthquake Detection 280 events* in the NEAM region

2240 events* at a global scale

2. Tsunami Detection

3. Data analysis, threat evaluation280 events* in the NEAM region

2240 events* at a global scale

4. Monitoring of the whole system capability

5. Elaborate and transmit alert and test messages 11 routine communication tests (fax, email and GTS)

1st message received in less than 2 minutes

MONITORING

ALERT

13

1st International Tsunami Exercise in the European region

Intergovernmental Coordination Group for the Tsunami Early Warning and Mitigation System in the North Eastern Atlantic, the Mediterranean and connected Seas (ICG/NEAMTWS)

Portugal

Italy

TurkeyKOERI

FranceCENALT

Five Candidate TsunamiWatch Provider (CTWP)

Achievement 2012

3 National Tsunami Warning Centers NTWC /CTWP

Operating

GreeceNOA

FORMATION CENALT NOVEMBRE 2011

Level of warning

YELLOW

YELLOW

ORANGE

RED

FRANCEINTERNATIONAL