Observed at high-frequencyPPPPKPPKSPKPPKPPcSScSPSPPPPPPSPKPPcPSKSSKKSPKKPPKPPKSPKPSKSPcPAll phases...

Question

Observed at high-frequencyPPPPKPPKSPKPPKPPcSScSPSPPPPPPSPKPPcPSKSSKKSPKKPPKPPKSPKPSKSPcPAll phases shown for distance ranges imaged in global stacksPPAstiz, L., Earle, P. and Shearer, P., 1996PdiffPPPPPPPPPPPPPPKKPPKPPKSScS2ScS3SdiffSKSPPSKSPPPSSPSKSPSSSSPPPPSSSSSSSS4S5S6S7SufaceWaves XXXXXXXXXX1800102030405060PPSPPPSPPPSPPSIASP91 Travel TimesDistance (degrees)Time(minutes)Surface Focus

Robert · Accepted Answer

Assignment
Q2.  
a) In order to identify surface waves, The P wave will be the first wiggle that is bigger than the 
rest of the little ones (the microseisms). These tiny microseisms can be caused by heavy 
traffic near the seismograph, waves hitting a beach, the wind, and any number of other 
ordinary things that cause some shaking of the seismograph. The second big wiggle will be S 
waves and just after that there will be surface waves.  
 The surface waves (Love and Rayleigh waves) are the other, often larger, waves marked on 
the seismogram
b)  The first seismic  arrival time=19.55 minutes 
Surface waves beginning time=45.05 minutes 
The elapsed time between first seismic arrival and the beginning of the surface wave 
train=45.

Observed at high-frequency PPP PKP PKS PKPPKP PcS ScS PS P PP PPP S PKPPcP SKS SKKSPKKP PKPPKS PKPSKS PcP All phases shown for distance ranges imaged in global stacks PP Astiz, L., Earle, P. and...

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