1. Paul Ogwari University of Memphis Center for Earthquake Research and Information 2nd year MSc
Research on: Effects of Type of Faulting on Earthquake Ground Motions in NMSZ
Evaluate the effect of type of faulting on earthquake ground motion (horizontal) by defining the distance scaling for earthquakes in the New Madrid Seismic Zone.
Multistage processing of seismic network data utilizing a coda normalization technique proposed by Aki (1980)

2. Matlab (run most of the process)
Data processing
PASSCAL PQL
(identify clean traces)
Remove Instrument Response
Rotate the seismogram
Matlab
(run most of the process)
Filter the seismogram: (1;2;3;4;5;6;8;10;12;14;16)
Fortran
(running memory consuming loops)
Integrate the square velocity and choose time window corresponding to 5-75% of energy from the onset of the S wave arrival
Condition: qualify only frequencies where the signal to noise ratio is >4
Choose a CODA window equal to signal window at >2
Get the absolute maximum amplitude of the filtered time series
Get the rms of CODA from the filtered time series
Get the rms of FFT of the Original time series for signal window chosen above: the freq window is
Freq: Stn Name: Peak_Vel_Amp: RMS_FFT_Amp: CODA_Amp(s): Distance: S_time: Coda_Env: Sign_duration:
Future
Pick phases and make some sense out of traces
Regression of coda normalized amplitude for attenuation relationships
And
Regression of peak amplitude for Source and site function