1) Microzonation main Volume - Ministry Of Earth Sciences

Deterministic Seismic Hazard Analysisidentified for generating the synthetic ground motion. These 8 sources considered for synthetic ground motiongeneration along with past earthquake events are shown in Table 3.4. The PGA values obtained form syntheticground motion model using regional seismotectonic parameters varies from 0.005g to 0.136g. These values foreach source are shown in Table 3.5. The lineament L15 gives the highest PGA value of 0.136g by takinghypocentral distance of 15.88km. The response spectrums for the simulated ground motions are plotted; it showsthat the predominant period of synthetic ground motion is 0.06 seconds irrespective of the magnitude andsources. Further, PGA obtained from the model for the L15 matches well with the PGA values from both theabove approaches. The synthetic ground motion for Mandya-Channapatna-Bangalore lineament (L15) is shownin Figure 3.11. Rock level spectral acceleration for Mandya-Channapatna-Bangalore lineament (L15) is shownin Figure 3.12. The generated the shape spectral acceleration in study matches with the shape of uniform hazardspectrum.0.200.15Acceleration (g)0.100.050.0029 30 31 32 33 34 35-0.05-0.10-0.15Time ( sec)Figure 3.11: Synthetic ground motion generated from Mandya-Channapatna-Bangalore lineament (L15)0.35Spectral Acceleration (g)0.300.250.200.150.100.050.000 0.25 0.5 0.75 1 1.25 1.5 1.75 2Period (sec)Figure 3.12: Rock level spectral acceleration from synthetic ground motion36