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Ground motion simulations in the Pollino region (Southern Italy) for Mw 6.4 scenario events

Ground motion simulations in the Pollino region (Southern Italy) for Mw 6.4 scenario events. ITIS023 Mercure Basin Fault ITCS038 Remediello-Mormanno Composite source DISS reports that the seismogenic potential associated to such faults is Mw 6.4. Source Model – Mercure Basin Fault.

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Ground motion simulations in the Pollino region (Southern Italy) for Mw 6.4 scenario events

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  1. Ground motion simulations in the Pollino region (Southern Italy) for Mw 6.4 scenario events

  2. ITIS023 Mercure Basin Fault ITCS038 Remediello-Mormanno Composite source DISS reports that the seismogenic potential associated to such faults is Mw 6.4.

  3. Source Model – Mercure Basin Fault Lenght=22km ; Width=13km Strike, dip, rake= 335° , 60°, -90° Top depth = 1 km Mw=6.4 Slip distribution = Heterogeneous (with 2 main patches of slip) rupture velocity = 0.8 Vs Approximated 1D wave-propagation (ray theory)

  4. Spectral attenuation model R=10km R=50km Rovelli et al., 1988 Cantore et al., 2011 – Irpinia 1<f<30 Hz Castro et al., 2004 – Basilicata 2<f<10 Hz GR=1/R Vs= 3.4 km/s κ =0.035 s

  5. DSM • Syntheticseismograms are computedthrough a modified versione of the stochasticmethodproposedbyBoore(1983) forpoint source model: • Gaussiannoiseismodulatedwithaccelerationenvelopes, computedsolving the rapresentationtheoremforanextend source • The amplitudes are scaledapplying a Reference Fourier spectrum, whoseparameters (corner frequencyand distancefrom the fault ) are inferredfrom the modellingof the extend source. Synthetic Seismogram Random Noise Deterministic Envelope IFFT (point-source-like Reference Spectrum) = X 

  6. Ground motionmaps (PGA bedrock) scenario 1: northwestern rupture propagation

  7. Ground motionmaps (PGA bedrock) scenario 2: bilateral rupture propagation

  8. Ground motionmaps (PGA bedrock) scenario 3: southeastern rupture propagation

  9. Ground motionmaps (PGA bedrock) GMPE scenario: ITA10 mean predictions

  10. CompariosonwithempiricalGMPEs

  11. Acc. Response Spectra at 2 sites Mormanno Lauria

  12. Strong motion data from RAN and INGV stations INGV stations

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