Geoscience Reference
In-Depth Information
0.3
100
PGA SCALING
Kurtosis = −0.05
Stdev/Mean = 0.18
Range = 0.224g
0.2
10
0.1
PGA = 0.36 g
0
1
0.2
0.25
0.3
0.35
0.4
0.22
0.26
0.3
0.34
0.38
0.42
0.3
100
PGV SCALING
Kurtosis = 0.42
Stdev/Mean = 0.38
Range = 1.61g
0.2
10
0.1
PGA = 0.41 g
1
0
0.17
0.25
0.33
0.41
0.49
0.57
0.3
0.35
0.4
0.45
0.5
0.3
100
AI SCALING
Kurtosis =
0.069
Stdev/Mean = 0.29
Range = 0.966 g
−
0.2
10
0.1
PGA = 0.31 g
1
0
0.2
0.25
0.3
0.35
0.15
0.2
0.25
0.3
0.35
0.4
Peak Ground Acceleration (g)
Peak Ground Acceleration (g)
Fig. 4.7. PGA Histograms onthe ground surface forPGA, PGV, and AI scaled records
and PGAs corresponding to10% exceedance probability
4. Microzonation
4.1. MICROZONATION WITHRESPECT TOGROUND MOTION
Withtheincreaseintheanalytical,in-situ,andlaboratoryinvestigationcapabilities,there
has been significant increase in the accumulated databases concerning the regional
geological formations, earthquake source mechanisms, seismic activity, and earth-
quake ground motion records. In the light of these scientific and technical advances,
itbecamefeasibletoconductseismicmicrozonationmapsaturbanlevelwithsufficiently
large scales. The main objective is to estimate earthquake characteristics on the ground
surface based on more comprehensive analyses taking into account major controlling
factors.
