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In the 3 rd International Symposium on Earthquake and Disaster Mitigation (ISEDM)

Validation of “Joko Tingkir” in the Real Time Tsunami Warning System: A Preliminary Result. Masturyono, Thomas Hardy, Madlazim, and Karyono. BMKG. Presented by : MASTURYONO. In the 3 rd International Symposium on Earthquake and Disaster Mitigation (ISEDM) Yogyakarta, 17-18 December 2013.

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In the 3 rd International Symposium on Earthquake and Disaster Mitigation (ISEDM)

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  1. Validation of “Joko Tingkir” in the Real Time Tsunami Warning System: A Preliminary Result Masturyono, Thomas Hardy, Madlazim, and Karyono BMKG Presented by : MASTURYONO In the 3rd International Symposium on Earthquake and Disaster Mitigation (ISEDM) Yogyakarta, 17-18 December 2013

  2. Background • The InaTEWS has been in operation since 2008  Warning : Potential Tsunami • Earthquake Information : No Potential Tsunami • Criteria : Magnitude > 7.0 ; Depth < 100 km; Located : in the sea • Magnitude is not good indicator for Tsunami-genic Earthquake. • Madlazim developed an aplication to evaluate the earthquake generating Tsunami by analizing the waveform  JokoTingkir

  3. BLOCK DIAGRAM of Ina-tews • SEISCOMP-3 : • AQUISITION • DATA PROCESSING • ANALIZING • ARCHIVING DISSEMINATION SYSTEM • FIELD SENSOR ; • SEISMIC • SEA LEVEL

  4. FLOW chart OF THE TSUNAMI WARNING EARTHQUAKE INFORMATION SEISMIC STATIONS SEISCOMP-3 TSUNAMI WARNING INTERFACE INSTITUTIONS DECISION SUPPORT SYSTEM WARNING SEGMENT

  5. Output sEiscomp-3 SEISCOMP-3 is an automatic system to determine the parameters of an earthquake and the tsunami warning. Input : waveform data stream from the stations Output : 1. Earthquake parameter (Origin time, Lat, Lon, Depth and the Magnitude) 2. Map showing the location of the earthquake 3. Warning (potential or NOT potential generating tsunami)

  6. Warning or information IF : NOT POTENTIAL GENERATING TSUNAMI then EARTHQUAKE INFORMATION will be disseminated (Mag, OT, Lat, Lon, Depth, distance from a reference point) IF : POTENTIAL GENERATING TSUNAMI then 1. TRIGER DSS to produce the warning segment 2. Collect and update the sea level monitoring

  7. “Jokotingkir” Madlazim : A software to calculate parameters as indicator of earthquake generating tsunami. The Parameters are : Tdur (Rupture duration), Td (Time Dominant), T50EX, and the Products (Tdur*Td, T50EX*Td) Tdur is associate/equivalent with the length of the rupture zone Td is associated/equivalent with the width of the rupture zone T50EX is associate/equivalent with the length of the rupture zone (better estimate than Tdur) The products are associate with the area of the rupture zone  Strength Scale of the EQ source

  8. JOKO TINGKIR FLOW CHART START READING THE WAVEFORM DATA PICKING P WAVE Test The Criteria BAND PASS FILTER 5-20 Hz Calculate : Tdom,Td, T50EX, Td*Td, Td*T50EX

  9. The parameterS • Td (Dominant Period) is the peak of time domain (τc) • (τc) = 2π ʃ ʋ2 (t) dt /ʃ ὐ2 (t) dt • T50EX (T50 Exceeding) is the ratio between the Rms of the amplitude rupture duration for 50-60 seconds and the Rms of those for 0-25 seconds (Wu and Kanamori, 2005;Lomax and Michelini, 2011)

  10. Calculation of the parameters • T(dur), T(dom) and T50EX are calculated for the first minute of P wave recorded in the station. • Calculation using a aplication software developed using BASH programing language in the Linux • Compilation of the seismogram is using SeisGram2K • Calculation is done in the off line mode

  11. Test RESULT FOR the LARGER EARTHQUAKES (off line running)

  12. Design implementation InaTEWS TRIGER Auto Loc JokoTingkir Calculate : Tdom,Td, T50EX, Td*Td, Td*T50EX Input Managemen Unit Test The Criteria • DISPLAY • Location Map • EQ Parameter • Tsunami Indicator • Warning

  13. Criteria of the Potential Tsunami

  14. TIME TABLE • Using automatic location within 3 minutes or after 30 station recorded the event • Total time to import the data, reading the waveform, picking the P phase and calculating the parameter is about 1 minute • The total time needed is about 4 minutes

  15. Display the Warning based on Tdur, Td and T50Ex

  16. Display input parameter and arrival station

  17. Test RESULT FOR smaller EARTHQUAKES (on line running) Number Event : 171 Range magnitude : 5.0 – 7.2 Criteria : Td*T50Ex > 10 and Td*Tdur > 650 Result : Consistent : 96.5 % ; Parameter below criteria, Observation: No Tsunami Inconsistent : 3.5 % : Parameter fulfil the criteria, Observation : the No Tsunami

  18. summary • “JOKO TINGKIR” has been implemented in the real time data flow within the InaTEWS Network for validation purpose • Preliminary result for showing that 96.5 % of 171 event tested are consistent with the criteria set for the validation test. • The criteria used in this validation test are Td*T50Ex > 10 and Td*Tdur > 650 for earthquake generating tsunami. • The total time used to get the result is about 4 minutes, if the Trigger taken from automatic location from InaTEWS

  19. Thank You and TERIMA KASIH

  20. Rupture Duration Estimation Method Seismogram broadband vertical (raw data) HF Filtered bandpass 1 - 5 Hz (Tele) HF Filtered bandpass 5 - 20 Hz (Local) Tdur = (1-w) T90% +w T20%. Calculate RMS amplitudo 90%,80%,50% dan 20% Picking P wave travel time w = [(T80%+T50%)/2 – 20]/40 s Measure time delay Amp. 90%,80%,50% dan 20% Calculate rupture duration (Tdur) TIDAK T90%<Tdur<T20%? YA 34 Plot rupture duration (Lomax and Micellini,2010)

  21. Time Domain ( ) dan Dominant Period (Td) Gelombang P Td merupakan nilai puncak dari (Wu and Kanamori, 2005;Lomax and Michelini, 2011)

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