WORKPACKAGE-2“REAL-TIME ESTIMATION OF EARTHQUAKE SOURCE PARAMETERS”
SAFER PROJECT
Coordinator: Aldo Zollo, Università di Napoli Federico II - AMRA scarl
ID Partner Country
1 GeoForschungsZentrum Potsdam (GFZ) Germany
2 AMRA Scarl (AMRA) Italy
3 Universität Karlsruhe (TH) (UNIKARL) Germany
4 Bogazici Universitesi (KOERI) Turkey
6 Istituto Nazionale di Geofisica e Vulcanologia (INGV) Italy
8 National & Kapodistrian University of Athens (NKUA) Greece
9 Centre National de la Recherche Scientifique, DR20 (CNRS - DR20) France
10 Centre Sismologique Euro-Mediterranéen (CSEM/EMSC) France
11 Eidgenoessische TechnischeHochschule Zuerich (ETHZ) Switzerland
12 Insitutul National De Cercetare-Dezvoltare Pentru F izica Pamantului-INCDFP Bucaresti (NIEP)
Romania
13 Stiftelsen Norsar (NORSAR) Norway
15 Icelandic Meteorological Office (IMOR) Iceland
17 University of California Berkeley (UC Berkeley) USA
18 National Taiwan University (NTU) Taiwan
21 National Research Institute for Earth Science and Disaster Prevention (NIED)
Japan
22 Koninklijk Nederlands Meteorologisch Instituut (KNMI) Netherland
Development, optimization and testing of algorithms for real-time earthquake location and magnitude estimation adopting an evolutionary approach.
General Objective
• Task 2.1 “Real-time methodologies for event detection and location”
• Task 2.2 “Real-time methodologies for magnitude/ moment estimates”
• Task 2.3 “Near real-time processing of seismic arrays for earthquake rapid alert”
• Task 2.4 “Implementation and testing of virtual seismologist expert system”
• Task 2.5 “Application of developed techniques to selected European test sites”
WP2 - Tasks
Methodologies vs time from the eqk origin
timeEarthquake
seconds minutes hours
E-larms
Virt Seism
PRESToTnow
Array
Teleseismic moment magnitude
Fault Mapping
Rapid Spectral Analysis
Earthquake location
Earthquake magnitude
E-larms
Virt Seism
PRESTo
PreSeis
PreSeis
ElarmS VirttSeisTnow
(Horiuchi)
Array PreSeis PRESTo Tele-seismic Faultmapping RSP
UCB UCB KA KA
INGV-MEDNET INGVUCB
ETHINGV KA
Turkey KA CNRS
Iceland IMOUCB
ETHIMO IMO
Romania NIEPUCB
NIEPNORSAR
Greece NKUAUCB
NKUANIED
NKUANORSAR CNRS
Switzerland ETHUCB ETH
ESMDB AMRA CNRS
ISNet ETH AMRA
VEBSN ORFEUSEMSC GFZ CNRS
K-Net / Kik-Net KA AMRA CNRS
Synth. Acceler.(KA, AMRA) KA AMRA
MethodsDataProviders
Matrix Methods/Data/Partners
Eqk detection and location : Summary
Approaches:Real-Time (few seconds):
- Station barycenter (E-larms)- Tnow (Horiuchi)- RTLOC (Satriano et al.)- 3-station triggering (NIEP)
Near-Real time (tens of secs minutes):- Earthquake Information Distribution System (EMSC-ORFEUS)- Relative micro-eqk location for fault mapping (IMO)- Array location (NORSAR)
Italy Greece Europe Iceland
Conclusions:-Accurate eqk location a few secs after the P-waves (<4 stations)- problem: events outside the network- speed depends critically on the robustness of data transmission and distribution
Data sets and regions
Magnitude estimation: SummaryApproaches:Real-Time (few seconds):- P & S initial amplitude(PRESTo, Taiwan)- P-wave dominant period (E-larms, Taiwan)- CAV (Cumulative Absolute velocity) (KARL, Koeri)
Near-Real time (tens of secs minutes):- Spectral amplitudes (GeoAzur, GFZ)
Italy Greece Europe Iceland
Conclusions:-A few secs after the P-waves : ±0.7- After about 10 sec : ± 0.5- Problems: P-peak displacement saturates above M ~ 6.5, dominant period large uncertainty- need of near source data: accelerograms!
Data sets and regions
Bucharest:National seismic networkRegional seismic networkStrong motionArrays
Istanbul:EW + RapidResponse networkOnsite, based on thresholdsStrong motion + broadbandEW online, RR offline
Athens:Accelerometric networkRegional network2 arrays
Naples:Regional networkStrong-motion & Short period
Cairo:Regional strong motion/sismometric networks
SAFER test sites
Data Method(s) Partners
Italy, Naples
Regional Network data (ISNet), synthetic waveforms,DISS (fault) catalogue
E-larms,PRESTo, RSP
AMRA, INGV, UC Berkeley, CNRS
Romania, Bucharest
All available data recorded since 1996.Bukovina Array data
Magnitude P wave vertical acceleration.Array monitoring of Romania seismicity
NIEP, NORSAR,
Turkey, Istanbul
Synthetic set of eqk scenario events
PreSeis -NeuralNetwork, Optimization of seismic network for EEW,
KOERI, UNIKARL
Greece, Athens
Strong and week motion network2 arrays
Tnow , on-site approach ,Array based processing approach
NKUA, NORSAR, NIED
Egypt, Cairo
Microtremor data collected at a dense network. Borehole data.
Site amplification effects. Shake-map implementation
NRIAG, GFZ
WP2 research activities in SAFER test sites
PresentationsPRESTo: the PRobabilistic and Evolutionary early warning SysTem in southern Italy (15 min) Satriano C., Zollo A., Iannaccone G., Elia L., Martino C., Lancieri M. and Festa G. (AMRA, Naples)
Implementing the Virtual Seismologist Expert System (15 min) G. Cua, M.Fischer, T. Heaton, and S.Wiemer (ETH, Switzerland) Moved to the afternoon
Rapid magnitude determination for Vrancea early warning system and the April 25, 2009 Mw= 5.3 event (15min) A.Marmureanu,C.Ionescu,Gh.Marmureanu (NIEP, Romania)
Rapid determination of the energy magnitude Me (10 min) D. Di Giacomo1, S. Parolai1, H. Grosser (GFZ , Germany)
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