GEOFON – Seismological Infrastructures, Global Seismic Monitoring and Tsunami Warning Winfried Hanka GFZ German Research Centre for Geosciences Potsdam, Germany SCUG3 Meeting, Potsdam,September 21, 2010 GEOFON – Cooperation is the Key! GEOFON tries ● to promote international broadband seismology in Europa and worldwide and ● to obtain maximum impact from minimum resources by intensive cooperation on all levels. It ● deploys permanent stations (~80), primarily as nuclei for adequate national networks (> 400 stations) ● develops software (SeisComP) for cooperative distributed ● real-time data collection (SeedLink => MEREDIAN) ● data archival & distribution (ArcLink => NERIES) ● real-time data processing (SC3 => early warning projects) ● provides several services to the community ● technical support on several levels ● backup data archival (GEVN, EIDA) ● earthquake information (EMSC, TWS) GEOFON Permanent Seismic Network GEOFON/WM: 79 stations GEOFON Extended Virtual Network GEOFON/WM: 77 NRT stations (+2 offline) GEVN ~ 750 stations Why Global Earthquake Monitoring is a Task for GEOFON? Trigger: The Boumerdes (Algeria) Mw=6.8 earthquake of May 25, 2003 Insufficient public informations! No first-hand informations! No notification service! Infos primarily from news media! 2266 casualties in Algeria - 3 m tsunami on Balearic islands Seismic Data Processing at GEOFON Data Center Other Earthquake and Tsunami Centres SC3 Messages Real-Time Data Seismic Waveforms Earthquake Information GEOFON Stations Internet SeedLink Server SeisComP3 Server VSAT GEVN Stations Offline Data (temp. nets) Network Management Operatoring QC Analysis SUN Cluster Waveform Archive Earthquake Database ArcLink Server Waveform + Metadata EIDA/GIDA ArcLink Servers Analyst Performance of GEVN Earthquake Monitoring System Automatic alerts >= 25 phases Location Distance Time Delay What has GEOFON to do with Tsunami Warning? => GITEWS Project GITEWS The Great Challenge: Tsunami Warning for Indonesia Tsunami travel times 20 - 40 min => warning time line < 5 min! GITEWS Seismic Network for the Indian Ocean Yemen Sri Lanka Kenya Maldives Madagascar Indonesia How can Seismology help Tsunami Warning? Standard concept for regional and national TWS: the Decision Matrix Recent Proposal for NEAMTWS Confirmation by sea level measurements required! GITEWS Tsunami Warning in 5 min – a great challenge! GITEWS Strategy: 1st step: 5 min warning issued on basis of the most probable pre-calculated tsunami scenario related to the actual seismic parameter set! Seismic network ● as many seismic stations as possible close to the trench ● BB, strong motion and CGPS sensors ● private VSAT links Seismic data processing ● rapid automatic determination of epicenter and depth range of rupture start ● non-saturating magnitudes for regional distances ● determination of rupture direction (if possible) Pre-calculated tsunami scenarios ● selection from thousands of pre-calculated tsunami scenarios on basis of continuously updated seismic parameters GITEWS The Challenge: Tsunami Warning for Indonesia 2nd step: verification by ocean and coastal sensor systems! Ocean Bottom Unit (pressure, seismic sensor) Tide Gauge GPS Buoy 3rd step: continuous update of warning status (new tsunami scenario?) GITEWS Tsunami Warning Concept – a “System of Systems” GITEWS Earthquake monitoring system Sensor Systems CGPS Tide guages OB pressure sensors GPS Buoyes EO Data Measurements Simulation DB local authorities exposed population more national and international recipients Situation evaluation and decision support SeisComP3 at BMKG – Virtual Seismic Network CSM Libra CGI CSM/GITEWS JISNET (NIED, Japan) BMKG Net CEA System IMS Net (CTBTO) NAQS BMG LAN WIN CN Net (CEA, China) CTBTO System sc-acqui (GITEWS) GFZ GITEWS VSAT Indonesia Maldives (Sri Lanka) Internet Malaysia Australia GEOFON IRIS GEOSCOPE GITEWS SeisComP3 Software Present Status: ● Real-time acquisition of virtual seismic networks: (GFZ > 750 stations) ● Visualization of overall situation (earthquake sources and network status) ● Automatic picking of seismic signals ● Automatic pick association and localisation ● Automatic determination of ground velocity ● Automatic determination of different fast magnitudes (Ml, mb, mB, Mw(mB), Mwp, Mj(bmg)) ● Manual verification of automatic solutions ● Manual event definition and analysis ● Moment tensors and rupture parameters (under development) GITEWS Successful Operation of SeisComP3 at BMKG – Example of the Bengkulu Quake September 12, 2007: first successful “home-made” tsunami alarm at BMG < 5 min ! BMG: M=7.9 GFZ: M=7.9 PTWC: M=7.9 NEIC: M=7.9 JMA: M=7.9 4.66S 101.11E 10 km issued 11:14:42 04:21 min 4.66S 101.13E 10 km issued 11:16:32 06:10 min 4.5S 101.3E issued 11:24 14 min 4.369S 101.557E 15 km issued 11:29 19 min 4.5S 101.3E issued 11:36 26 min SC3 man SC3 auto man man man Distributed SeisComP3 Systems throughout the Indian Ocean – GFZ Background Support GITEWS Internet INCOIS (India) GFZ (Germany) Internet Thailand Malaysia ... Internet NSOC (Yemen) South Africa ... Madagascar Kenya Tanzania Pakistan NMC (Maldives) Sri Lanka ... ... Western Indian Ocean Waveforms Parameters (QuakeML) Waveforms + Parameters Eastern Indian Ocean Internet BMKG (Indonesia) GITEWS GITEWS/GEOFON VSAT Communication Express AM22/AM1 Europe wide Ku Beam Telkom 2 C Band CROSAT (Vienna) Arabsat BADR 4 Ku Intelsat Intelsat IS10 Africa Ku Beam BMKG Upgrade of GEOFON Stations in NEAMTWS Area Cooperation with WM network Implementation started Cooperation with NOA Implementation underway Stations upgraded VSAT connection establ. (Monaco/EMSC project) GITEWS Distributed SeisComP3 System for Interim NEAMTWS Private National Stations INM (Tunisia) CEA/EMSC (France) Private IP Network IGN (Spain) IMP (Portugal) NOA (Greece) KOERI (Turkey) GFZ (Germany) SunCluster Internet Backbone Stations Waveforms Parameters (QuakeML) Public European & Global Stations Private National Stations CTBT Stations? ArcLink Network Concept DB synchronization DB s yn c hro n iz a tio y ar n nd tio c o ec Se onn c Active ArcLink node Active ArcLink node ry da co n i o n Se nect con y ar n d on ctio c e Se nn co n tio a z i r on h ync s DB Pr co ima nn ry ec tio n Client n Active ArcLink node Passive ArcLink node EIDAC – European Integrated Data Center GEVN (Global) IOTWS/NEAMTWS Temp. Nets VEBSN ODC Sync GFZ Distributed Archives connected by ArcLink & SeedLink Multi-national Data Archives & Portals FDSN/IRIS SeedLink/ArcLink Network User ....(ETH) NA2/NA3 INGV Italian Networks IPGP French Networks National Data Archives & Portals Real-Time Data Offline Data Temp. Net Data ArcLink Requests WebDC.eu Portal – Event+Station+Time Window Selection GITEWS Thank you very much!