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M 7.0, M L 6.96. M 6.9, M L 6.99. See Wen et al., Why 1G Was Recorded at TCU129 Site During the 1999 Chi-Chi, Taiwan, Earthquake, Bull. Seismol. Soc. Am. 91 , 1255-1266. Look for these things as a function of period. The lines are the same for both events - PowerPoint PPT Presentation
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119o30' 120o 120o30' 121o 121o30' 122o
22o
23o
24o
25o
long
lat
P1
no Vs30class Eclass Dclass Cclass BEq
Taipei basin
Lanyang basin
Longitudinal Valley
File
:C
:\pi
ngtu
ng_2
6dec
06\P
1(Fi
rst_
Pin
gTun
g_E
arth
quak
e)\m
ap_p
1_v3
0_h_
smc_
info
.dra
w;
Dat
e:20
08-0
9-11
;Ti
me:
16:2
4:23
M 7.0, ML 6.96
119o30' 120o 120o30' 121o 121o30' 122o
22o
23o
24o
25o
long
lat
P2
no Vs30class Eclass Dclass Cclass BEq
Taipei basin
Lanyang basin
Longitudinal Valley
File
:C
:\pi
ngtu
ng_2
6dec
06\P
2(S
econ
d_P
ingT
ung_
Ear
thqu
ake)
\map
_p2_
v30_
h_sm
c_in
fo.d
raw
;D
ate:
2008
-09-
11;
Tim
e:16
:25:
08
M 6.9, ML 6.99
119o30' 120o 120o30' 121o 121o30' 122o
22o
23o
24o
25o
long
lat
TCU129
P2
no Vs30class Eclass Dclass Cclass BEq
File
:C
:\pi
ngtu
ng_2
6dec
06\P
2(S
econ
d_P
ingT
ung_
Ear
thqu
ake)
\map
_p2_
v30_
h_sm
c_in
fo_t
cu12
9.dr
aw;
Dat
e:20
08-0
9-10
;Ti
me:
15:0
7:01
119o30' 120o 120o30' 121o 121o30' 122o
22o
23o
24o
25o
long
lat
TCU159
P2
no Vs30class Eclass Dclass Cclass BEq
File
:C
:\pi
ngtu
ng_2
6dec
06\P
2(S
econ
d_P
ingT
ung_
Ear
thqu
ake)
\map
_p2_
v30_
h_sm
c_in
fo_t
cu12
9_15
9.dr
aw;
Dat
e:20
08-0
9-10
;Ti
me:
15:0
7:26
0 20 40 60 80-60
-40
-20
0
20
40
Acc
eler
atio
n(c
m/s
2)
TCU129 NS
0 20 40 60 80-60
-40
-20
0
20
40
60
TCU129 EW
0 20 40 60 80-15
-10
-5
0
5
10
15
Time (s)
Acc
eler
atio
n(c
m/s
2)
TCU159 NS
0 20 40 60 80-15
-10
-5
0
5
10
15
Time (s)
TCU159 EW
File
:C
:\pi
ngtu
ng_2
6dec
06\P
2(S
econ
d_P
ingT
ung_
Ear
thqu
ake)
\Goo
dEQ
2_16
bit_
Hco
mp\
tcu1
29_1
59_a
cc.d
raw
;D
ate:
2008
-09-
10;
Tim
e:14
:55:
29
45 46 47 48 49 50-60
-40
-20
0
20
40
Acc
eler
atio
n(c
m/s
2)
TCU129 NS
45 46 47 48 49 50-60
-40
-20
0
20
40
60
TCU129 EW
45 46 47 48 49 50-15
-10
-5
0
5
10
15
Time (s)
Acc
eler
atio
n(c
m/s
2)
TCU159 NS
45 46 47 48 49 50-15
-10
-5
0
5
10
15
Time (s)
TCU159 EW
File
:C
:\pi
ngtu
ng_2
6dec
06\P
2(S
econ
d_P
ingT
ung_
Ear
thqu
ake)
\Goo
dEQ
2_16
bit_
Hco
mp\
tcu1
29_1
59_a
cc_e
xpan
ded.
draw
;D
ate:
2008
-09-
10;
Tim
e:14
:56:
38
0.1 1 10
0.01
0.1
1
10
Frequency (Hz)
Fou
rier
Acc
eler
atio
nS
pect
rum
(cm
/s)
P2: NSP2: EW
TCU129
0.1 1 10
Frequency (Hz)
P2: NSP2: EW
TCU159
File
:C:\p
ingt
ung_
26de
c06\
P2(
Sec
ond_
Pin
gTun
g_E
arth
quak
e)\G
oodE
Q2_
16bi
t_H
com
p\fa
s_tc
u129
_159
.dra
w;
Dat
e:20
08-0
9-10
;T
ime:
14:5
9:35
0.1 1 10
0.01
0.1
1
10
Frequency (Hz)
Fou
rier
Acc
eler
atio
nS
pect
rum
(cm
/s)
P1: NSP1: EW
TCU129
0.1 1 10
0.1
1
10
100
Frequency (Hz)
1999 Chi-Chi MS: NS1999 Chi-Chi MS: EW
TCU129
File
:C:\p
ingt
ung_
26de
c06\
P1(
Fir
st_P
ingT
ung_
Ear
thqu
ake)
\Goo
dEQ
1_16
bit_
Hco
mp\
fas_
tcu1
29_p
1_ch
i-ch
i.dra
w;
Dat
e:20
08-0
9-10
;T
ime:
14:5
9:04
0.1 1 10
0.01
0.1
1
10
Frequency (Hz)
Fou
rier
Acc
eler
atio
nS
pect
rum
(cm
/s)
P1: NSP1: EW
TCU129
0.1 1 10
0.1
1
10
100
Frequency (Hz)
1999 Chi-Chi MS: NS1999 Chi-Chi MS: EW
TCU129
File
:C:\p
ingt
ung_
26de
c06\
P1(
Fir
st_P
ingT
ung_
Ear
thqu
ake)
\Goo
dEQ
1_16
bit_
Hco
mp\
fas_
tcu1
29_p
1_ch
i-ch
i.dra
w;
Dat
e:20
08-0
9-11
;T
ime:
19:4
1:39
See Wen et al., Why 1G Was Recorded at TCU129 Site During the 1999 Chi-Chi, Taiwan, Earthquake, Bull. Seismol. Soc. Am. 91, 1255-1266.
Look for these things as a
function of period
• P1 vs P2 magnitude scaling
• Site effects (pay particular attention to points beyond 300 km, some of them in the Taipei and Lanyang basins)
• Distance function (look at variations along line L2 in the Longitudinal Valley)
• Scatter
The lines are the same for both events
The scale of the ordinates of each graph is the same (for both events and for all periods)
30 40 100 200 300 4001
10
100
1000
RCD (km)
PS
A00
05
Earthquake 1300*(40/x)300*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
30 40 100 200 300 4001
10
100
1000
RCD (km)
PS
A00
05
Earthquake 2300*(40/x)300*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
File
:C
:\pi
ngtu
ng_2
6dec
06\
regr
ess_
psa
\t0
.05
_p1
_p2_
vs_
r.d
raw
;D
ate
:20
08-0
9-11
;Ti
me
:16
:46
:20
30 40 100 200 300 4001
10
100
1000
RCD (km)
PS
A00
08
Earthquake 1400*(40/x)400*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
30 40 100 200 300 4001
10
100
1000
RCD (km)
PS
A00
08
Earthquake 2400*(40/x)400*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
File
:C
:\pi
ngtu
ng_2
6dec
06\
regr
ess_
psa
\t0
.07
5_p
1_p2
_vs
_r.d
raw
;D
ate
:20
08-0
9-11
;Ti
me
:17
:05
:30
30 40 100 200 300 4001
10
100
1000
RCD (km)
PS
A00
10
Earthquake 1500*(40/x)500*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
30 40 100 200 300 4001
10
100
1000
RCD (km)
PS
A00
10
Earthquake 2500*(40/x)500*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
File
:C
:\pi
ngtu
ng_2
6dec
06\
regr
ess_
psa
\t0
.1_
p1_
p2_v
s_r.
draw
;Dat
e:
2008
-09-
11;
Tim
e:
17:0
7:2
4
30 40 100 200 300 4001
10
100
1000
RCD (km)
PS
A00
20
Earthquake 1400*(40/x)400*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
30 40 100 200 300 4001
10
100
1000
RCD (km)
PS
A00
20
Earthquake 2400*(40/x)400*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
File
:C
:\pi
ngtu
ng_2
6dec
06\
regr
ess_
psa
\t0
.2_
p1_
p2_v
s_r.
draw
;Dat
e:
2008
-09-
11;
Tim
e:
17:0
9:1
3
30 40 100 200 300 4001
10
100
1000
RCD (km)
PS
A00
40
Earthquake 1400*(40/x)400*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
30 40 100 200 300 4001
10
100
1000
RCD (km)
PS
A00
40
Earthquake 2400*(40/x)400*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
File
:C
:\pi
ngtu
ng_2
6dec
06\
regr
ess_
psa
\t0
.4_
p1_
p2_v
s_r.
draw
;Dat
e:
2008
-09-
11;
Tim
e:
17:1
0:2
4
30 40 100 200 300 400
1
10
100
RCD (km)
PS
A01
00
Earthquake 1200*(40/x)200*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
30 40 100 200 300 400
1
10
100
RCD (km)
PS
A01
00
Earthquake 2200*(40/x)200*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
File
:C
:\pi
ngtu
ng_2
6dec
06\
regr
ess_
psa
\t1
.0_
p1_
p2_v
s_r.
draw
;Dat
e:
2008
-09-
11;
Tim
e:
17:1
3:5
8
30 40 100 200 300 400
1
10
100
RCD (km)
PS
A02
00
Earthquake 150*(40/x)50*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
30 40 100 200 300 400
1
10
100
RCD (km)
PS
A02
00
Earthquake 250*(40/x)50*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
File
:C
:\pi
ngtu
ng_2
6dec
06\
regr
ess_
psa
\t2
.0_
p1_
p2_v
s_r.
draw
;Dat
e:
2008
-09-
11;
Tim
e:
17:1
5:4
9
30 40 100 200 300 4000.1
1
10
100
RCD (km)
PS
A03
00
Earthquake 150*(40/x)50*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
30 40 100 200 300 4000.1
1
10
100
RCD (km)
PS
A03
00
Earthquake 250*(40/x)50*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
File
:C
:\pi
ngtu
ng_2
6dec
06\
regr
ess_
psa
\t3
.0_
p1_
p2_v
s_r.
draw
;Dat
e:
2008
-09-
11;
Tim
e:
17:1
7:0
4
30 40 100 200 300 400
0.1
1
10
RCD (km)
PS
A04
00
Earthquake 125*(40/x)25*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
30 40 100 200 300 400
0.1
1
10
RCD (km)
PS
A04
00
Earthquake 225*(40/x)25*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
File
:C
:\pi
ngtu
ng_2
6dec
06\
regr
ess_
psa
\t4
.0_
p1_
p2_v
s_r.
draw
;Dat
e:
2008
-09-
11;
Tim
e:
17:1
8:4
8
30 40 100 200 300 400
0.1
1
10
RCD (km)
PS
A05
00
Earthquake 125*(40/x)25*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
30 40 100 200 300 400
0.1
1
10
RCD (km)
PS
A05
00
Earthquake 225*(40/x)25*(40/x)^2class Eclass Dclass CVs30_>760L2 (Chen et al.)
File
:C
:\pi
ngtu
ng_2
6dec
06\
regr
ess_
psa
\t5
.0_
p1_
p2_v
s_r.
draw
;Dat
e:
2008
-09-
11;
Tim
e:
17:1
9:5
1
What can we say about
• Site effects• Distance function• Scatter
