Tsunami Early Warning in the Indian Ocean – Joint German Indonesian Effort J. Lauterjung, GeoForschungsZentrum Potsdam.

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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 stations Location of marine equipment (Buoys and Ocean- Bottom-Units, Tide Gauges) Integration of Tsunami simulations Design 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 Bojensysteme Landstationen Küstenpegel

Tsunami Early Warning System

EARLY WARNING APPLICATION: SPATIAL ANALYSER DECISION PROCESS CONTROLLER SPATIAL ANALYSER WARNING 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 Group Coordination of national activities with the aim to define policies, protocols and standards for the establishment of an Indian Ocean Tsunami Warning System Working Groups: Seismology Ocean Instrumentation Tsunami Modelling and Risk Modelling Interoperability 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

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