German Tsunami Early-Warning Systrem

Jan 18, 2005

1

Indonesian-German

Tsunami Early-Warning System

Helmholtz-Association of German Research-Centres (HGF)

Components of an Early Warning System

Components(1) Real-Time Earthquake Monitoring

Location and magnitude in a few minutesDisplacement measurements by GPS

(2) Real-Time Sea Level MonitoringGPS-Buoys with ocean-bottom pressure sensorsGPS-controlled tide gauges

(3) Tsunami SimulationBathymetry

(4) Installation of national/local Data- and Early-Warning-Centres

(5) Capacity Building

German Tsunami Early-Warning Systrem

Jan 18, 2005

2

The GEOFON Network and its Partner Networks(GEVN - GEOFON Extended Virtual Network )

Real-Time Earthquake Monitoring

Proposed Station Distribution for an Earthquake Monitoring Network for the Indian Ocean Region (Locations to be discussed)

Real-Time Earthquake Monitoring

German Tsunami Early-Warning Systrem

Jan 18, 2005

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Proposed Real-Time Earthquake Monitoring Network in Indonesia(Locations to be discussed)

Real-Time Earthquake Monitoring

Displacements after the Sumatra Quake

German Tsunami Early-Warning Systrem

Jan 18, 2005

4

Displacements after the Sumatra Quake

GPS-Buoy with Ocean-bottom Pressure Sensor

Real time measurement of Sea Level by- Ocean-bottom Pressure Sensor- High-precision GPS-Positioning of the Buoy

Real-Time Sea Level Monitoring

German Tsunami Early-Warning Systrem

Jan 18, 2005

5

Oceanbottom Pressure Sensor

GPS-Buoy

Real-Time Sea Level Monitoring

German Tsunami Early-Warning Systrem

Jan 18, 2005

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Timeseries (1 hour) of the local sea level changes from GPS

Real-Time Sea Level Monitoring

IGS Tide Gauges

Provide highly accurate long-term time series for the vertical land motion at tide gauges for sea level studies

Chairman: Tilo Schöne, GFZ

Existing tide gauge/GPS stations

planned

German Tsunami Early-Warning Systrem

Jan 18, 2005

7

Bathymetric Model fromGEBCO 1‘ x 1‘ grid

Epicentres

200 m depth contour2000 m depth contour

200 m

2000 m

Tsunami Simulation

Trackcontrol form:IHO/IOC GEBCOIHO DCDBNGDC/GEODAS

Gapssparse data

German Tsunami Early-Warning Systrem

Jan 18, 2005

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Multibeam Survey RV „Sonne“

Multibeam Survey

HMS Scott Jan 2005

The Concept

• Stepwise Realization: (1) Direct action(2) Longterm Support

• Modular ConceptCompatible with other systemsExpansion to other disasters (Volcanoes, land slides, meteorological hazards,....)

• Decentralized and open System (National/local Early-Warning-Centres)

• Transferable to other regions

• Recent technological developments

• Capacity Building