Tsunami Early Warning in the

Indian Ocean –Joint German Indonesian Effort

J. Lauterjung, GeoForschungsZentrum Potsdam

Estimated Propagation of Tsunami after the Sumatra Quake

Tsunami-Propagation

Challenges of Tsunami Early Warning in Indonesia

Subductionzone near the coastline of Indonesia (almost parallel)

Traveltime of Tsunamis ~ 20 min Reliable Warnings have to be issued within 10 min.

This defines most of the system design as:Distribution of seismic stations and GPS stationsLocation of marine equipment (Buoys and Ocean-Bottom-Units, Tide Gauges)Integration of Tsunami simulationsDesign of Warning Dissemination

International Seismic Network in Indonesia

Tsunami-Buoy

GPS-Antenna

Communication

Meteorological Instruments

Accustic-Modem

Oceanbottom- Seismometer

Pressure Sensor

Ocean-Bottom-Unit

Tsunami Buoy System

Tsunami

TEWS Instrumentation

BojensystemeLandstationenKüstenpegel

Tsunami Early Warning System

EARLY WARNING APPLICATION: SPATIAL ANALYSER

DECISION PROCESS CONTROLLER

SPATIAL ANALYSERWARNING DISPATCHER

Simulation Match

Data Selection

Intersection & Analysis

Warning Generation& Delivery

Input: Event Parameters

Output: Event yes/no

I: Event Parameters

O: Best fitting simulation

I: Best fitting simulation

O: Hazard Map & Aux Data of event area

I: Hazard Map & Aux Data

O: Vulnerability & Damage Maps

I: Vulnerability & Damage Maps + recommendations („warning chain“)

O: Warning Dossier

Event Trigger

Controlling of EW modules and processes

UNESCO Framework

Intergovernmental Coordination GroupCoordination of national activities with the aim to define policies, protocols and standards for the establishment of an Indian Ocean Tsunami Warning System

Working Groups:

SeismologyOcean InstrumentationTsunami Modelling and Risk ModellingInteroperability of National Warning Centres

Outlook

Instrumentation almost complete and operational within the next 2-3 years, including national warning centres

Needs

Reference architecture for the overall system

Operating infrastructures for dissemination of warnings

Platform for the interoperability and interaction between national Warning Centres