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Ground Motion Records

The Chi-Chi Earthquake occurred on the Chelungpu fault on September 21, 1999; the moment magnitude of the main shock was 7.6.  The ground motions generated by the earthquake were recorded by 387 strong motion stations in Taiwan.  Details about the recordings of the main shock can be found in Lee et al. (1999).  Digital data about all the station records can be found through this link: http://www-scf.usc.edu/~asghari/ChiChi.htm.  Ten strong motion stations that might be considered for liquefaction analysis in the study areas, are shown in Figure 11.  The basic data of the ten stations are listed in Table 1. 

 

Figure 11. Ten strong motion stations related to the present study

 

Station

Coordinates

Epicenter distance (km)

Peak Ground Acceleration PGA (gal)

Longitude (N)

Latitude (E)

Vertical

N-S

E-W

TCU065

120o41.46'

24o03.54'

25.57

257.80

563.22

774.42

TCU076

120o40.54'

23o54.47'

15.25

275.38

420.02

340.10

TCU110

120o34.19'

23o57.70'

27.50

116.28

187.52

178.24

TCU112

120o25.41'

24o03.36'

45.50

65.26

68.00

78.30

TCU117

120o27.62'

24o07.98'

47.22

89.96

113.46

121.30

TCU120

120o36.78'

23o58.80'

24.62

166.52

193.50

222.98

TCU123

120o32.56'

24o01.06'

32.89

85.54

131.96

149.00

TCU129

120o41.06

23o52.70'

13.54

334.96

610.76

983.00

TCU138

120o35.07'

23o55.34'

55.34

110.36

207.40

202.24

CHY104

120o27.94'

23o40.19'

41.33

129.68

177.12

142.90

Table 1. Peak Ground Accelerations recorded by the ten stations related to this study

 

 

 

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