Transcript 2000年台灣地震與地震學 研究之回顧與展望系列研討會

International Conference on Soil Liquefaction,
November 3-4, 2003
Estimation of Strong Motion Response
Spectra from Weak Motion Data for
Earthquakes in Taiwan
Yi-Ben Tsai1 and Hsiao-Ling Chao2
1. Institute of Geophysics, National Central University, Chung-Li, Taiwan
2. Seismology Center, Central Weather Bureau, Taipei, Taiwan
Outlines of my presentation
Two seismic strong motion networks in Taiwan
＊ 80-station real-time network for rapid reporting.
＊ 650-station free-field network for dense coverage.
Highly repeatable local site response of ground motion
＊ Moderate earthquakes up to M5.8.
＊ Large Chi-Chi aftershocks up to M6.5.
Testing results from M7.6 Chi-Chi earthquake data
＊ Very reliable for distant stations.
＊ Reliable for near-source stations with some exceptions.
Conclusion
＊ Combination of the two networks can provide rapid and
reliable estimation of strong ground motion response
spectra.
Purpose: To make use of two excellent strong-motion networks
for rapid mapping of dense strong-motion distributions.
For timeliness: Taiwan Rapid Earthquake Information
Release System.
For dense coverage: Taiwan Strong Motion Instrumentation
Program Network .
Data analyzed: Chi-Chi earthquake,M7.6,396 stations.
6 Chi-Chi aftershocks ,M6.3-6.5,331-375 stations.
Chiayi earthquake, M5.8,336 stations.
Rayli earthquake, M5.7,231 stations.
Event
No.
Origin time
(UT)
Lat. (°N)
Long.
(° E)
Depth
(km)
EQ1
1999/09/20
17:47:15.85
23.853
120.815
EQ2
1999/09/20
18:03:40.83
23.806
EQ3
1999/09/20
18:11:52.73
EQ4
Magnitude
ML
MW
Station
No.
8.0
7.06
7.6
396
120.850
9.97
6.26
6.3
331
23.899
121.031
5.29
6.35
6.4
366
1999/09/20
18:16:16.48
23.866
121.059
8.36
6.33
6.4
357
EQ5
1999/09/20
21:46:37.35
23.564
120.904
4.39
6.22
6.4
345
EQ6
1999/09/22
00:14:40.51
23.826
121.047
15.59
6.47
6.4
375
EQ7
1999/09/25
23:52:49.51
23.826
120.994
20.90
6.44
6.5
367
EQ8
1999/10/22
02:18:56.55
23.496
120.422
23.14
6.07
5.8
336
EQ9
1998/07/17
04:51:15.02
23.503
120.664
5.71
5.90
5.7
231
Area
TREIRS station
Free-field station
(reference station)
CHY
TWL
TAI1
PNG
CHY081
CHY078
CHY075
TCU
HSN
TCU
TCU081
TCU082
KAU
KAU
SGL
KAU045
KAU048
TTN
CHK
TTN
TTN014
TTN015
HWA
HWA*
ESL*
HWA019
HWA020
ILA
ILA
TWE*
ILA049
ILA051
TAP
TWA*
TWS1*
TAP067
TAP087
* means the record in TREIRS station is replaced by the
record in free-field station.
Spectral Acceleration (g)
10
V
1
0.1
0.1
1
10
100
Frequency (Hz)
Spectral Acceleration (g)
10
EW
1
0.1
0.1
1
10
100
Frequency (Hz)
10
Spectral Acceleration (g)
EQ.1
TAP
CHY
TCU
TTN
KAU
HWA
ILA
NS
1
0.1
0.1
1
10
Frequency (Hz)
100
Spectral Acceleration (g)
10
V
1
0.1
0.1
1
10
100
Frequency (Hz)
Spectral Acceleration (g)
10
EW
1
0.1
0.1
1
10
100
Frequency (Hz)
Spectral Acceleration (g)
10
EQ1,Mw=7.6
EQ2,Mw=6.3
EQ3,Mw=6.4
EQ4,Mw=6.4
EQ5,Mw=6.4
EQ6,Mw=6.4
EQ7,Mw=6.5
EQ8,Mw=5.8
EQ9,Mw=5.7
NS
1
0.1
0.1
1
10
Frequency (Hz)
100
2
ln (NAV/OAV)
TAP-Horizontal
1
0
-1
-2
0.1
1
10
100
Frequency (Hz)
2
ln (NAV/OAV)
ILA-Horizontal
1
0
-1
-2
0.1
1
10
100
Frequency (Hz)
2
ln (NAV/OAV)
CHY-Horizontal
1
0
-1
-2
0.1
1
10
100
Frequency (Hz)
OAV : TAP (Lin, 1997) ILA (Chen, 1997)
NAV : Six Chichi Aftershocks
CHY (Yang, 1999)
2
ln (921/OAV)
TAP-Horizontal
1
0
-1
-2
0.1
1
10
100
Frequency (Hz)
2
ln (921/OAV)
ILA-Horizontal
1
0
-1
-2
0.1
1
10
100
Frequency (Hz)
2
ln (921/OAV)
CHY-Horizontal
1
0
-1
-2
0.1
1
10
100
Frequency (Hz)
OAV : TAP (Lin, 1997) ILA (Chen, 1997)
921 : 921 Chich Earthquake
CHY (Yang, 1999)
TCU082 (EW)
0.1
EQ1 (Mw=7.6, R=36.66km)
0
-0.1
0.1
EQ2 (Mw=6.3, R=43.06km)
0
-0.1
0.1
EQ3 (Mw=6.4, R=45.73km)
Acceleration (g)
0
-0.1
0.1
0
EQ4 (Mw=6.4, R=50.63km)
-0.1
0.1
EQ5 (Mw=6.4, R=69.04km)
0
-0.1
0.1
0
EQ6 (Mw=6.4, R=52.35km)
-0.1
0.1
0
EQ7 (Mw=6.5, R=52.52km)
-0.1
0.1
EQ8 (Mw=5.8, R=76.52km)
0
-0.1
0.1
EQ9 (Mw=5.7, R=71.77km)
0
-0.1
0
40
80
Time (sec)
120
160
0921 Chichi
TCU Horizontal-component
TCU039
TCU017
TCU006
1
0.1
0.01
0.1
1
10
Frequency (Hz)
1
Sa (g)
Sa (g)
Sa (g)
1
0.1
0.01
0.1
100
1
10
Frequency (Hz)
0.1
0.01
0.1
100
1
10
Frequency (Hz)
TCU059
TCU072
1
Sa (g)
Sa (g)
1
0.1
0.01
0.1
1
10
Frequency (Hz)
0.1
0.01
0.1
100
TCU070
100
1
Sa (g)
Sa (g)
1
10
Frequency (Hz)
TCU074
1
0.1
0.01
0.1
1
10
Frequency (Hz)
0.1
0.01
0.1
100
TCU048
1
10
Frequency (Hz)
100
TCU089
1
Sa (g)
1
0.1
1
10
Frequency (Hz)
TCU122
TCU110
0.1
1
10
Frequency (Hz)
100
TCU082
0.1
0.01
0.1
1
10
Frequency (Hz)
1
1
Sa (g)
1
0.01
0.1
0.1
0.01
0.1
100
Sa (g)
0.01
0.1
Sa (g)
Sa (g)
100
1
10
Frequency (Hz)
100
TREIRS stations
0.1
0.01
0.1
1
10
Frequency (Hz)
Calculated
Observed
100
100
0921 Chichi
CHY Horizontal-component
CHY004
CHY002
CHY080
1
0.1
0.01
0.1
1
10
Frequency (Hz)
100
Sa (g)
1
Sa (g)
Sa (g)
1
0.1
0.01
0.1
1
10
Frequency (Hz)
0.1
0.1
100
1
10
Frequency (Hz)
CHY012
CHY046
1
Sa (g)
Sa (g)
1
0.1
0.01
0.1
1
10
Frequency (Hz)
0.1
0.01
0.1
100
CHY058
100
1
Sa (g)
Sa (g)
1
10
Frequency (Hz)
CHY014
1
0.1
0.01
0.1
1
10
Frequency (Hz)
0.1
0.01
0.1
100
CHY067
100
Sa (g)
1
0.1
1
10
Frequency (Hz)
0.01
0.1
CHY070
1
100
Sa (g)
Sa (g)
1
10
Frequency (Hz)
0.1
0.01
0.1
1
10
Frequency (Hz)
CHY019
CHY022
1
0.1
0.01
0.1
0.1
100
1
Sa (g)
0.01
0.1
1
10
Frequency (Hz)
CHY079
1
Sa (g)
100
1
10
Frequency (Hz)
100
TREIRS stations
0.1
0.01
0.1
1
10
Frequency (Hz)
100
Calculated
Observed
100
0921 Chichi
KAU Horizontal-component
KAU085
KAU054
KAU050
0.1
0.01
0.1
1
10
Frequency (Hz)
1
Sa (g)
1
Sa (g)
Sa (g)
1
0.1
0.01
0.1
100
1
10
Frequency (Hz)
0.1
0.01
0.1
100
1
10
Frequency (Hz)
KAU008
KAU047
1
Sa (g)
Sa (g)
1
0.1
0.01
0.1
1
10
Frequency (Hz)
0.1
0.01
0.1
100
KAU006
1
10
Frequency (Hz)
100
KAU077
1
Sa (g)
Sa (g)
0.1
0.01
0.1
1
10
Frequency (Hz)
0.1
0.01
0.1
100
KAU032
Sa (g)
1
10
Frequency (Hz)
0.01
0.1
1
10
Frequency (Hz)
100
1
Sa (g)
Sa (g)
0.1
0.1
0.01
0.001
0.1
1
10
Frequency (Hz)
KAU081
KAU038
KAU017
0.01
0.1
0.1
100
1
Sa (g)
100
1
0.1
0.01
0.1
1
10
Frequency (Hz)
KAU074
1
Sa (g)
100
1
10
Frequency (Hz)
100
TREIRS stations
0.1
0.01
0.1
1
10
Frequency (Hz)
100
Calculated
Observed
100
0921 Chichi
TTN Horizontal-component
TTN051
TTN020
TTN001
0.1
0.01
0.1
1
10
Frequency (Hz)
100
1
Sa (g)
1
Sa (g)
Sa (g)
1
0.1
0.01
0.1
1
10
Frequency (Hz)
0.1
0.01
0.1
100
1
10
Frequency (Hz)
TTN023
TTN033
1
Sa (g)
Sa (g)
1
0.1
0.01
0.1
1
10
Frequency (Hz)
0.1
0.01
0.1
100
TTN024
100
1
Sa (g)
Sa (g)
1
10
Frequency (Hz)
TTN002
1
0.1
0.01
0.1
1
10
Frequency (Hz)
0.1
0.01
0.1
100
TTN025
100
Sa (g)
1
0.1
1
10
Frequency (Hz)
0.01
0.1
TTN018
1
100
Sa (g)
Sa (g)
1
10
Frequency (Hz)
0.1
0.01
0.1
1
10
Frequency (Hz)
TTN050
TTN003
1
0.1
0.01
0.1
0.1
100
1
Sa (g)
0.01
0.1
1
10
Frequency (Hz)
TTN005
1
Sa (g)
100
1
10
Frequency (Hz)
100
TREIRS stations
0.1
0.01
0.1
1
10
Frequency (Hz)
100
Calculated
Observed
100
0921 Chichi
HWA Horizontal-component
HWA058
HWA056
HWA025
1
0.1
0.01
0.1
1
10
Frequency (Hz)
100
1
Sa (g)
Sa (g)
Sa (g)
1
0.1
0.01
0.1
1
10
Frequency (Hz)
0.1
0.01
0.1
100
1
10
Frequency (Hz)
HWA017
HWA012
1
Sa (g)
Sa (g)
1
0.1
0.01
0.1
1
10
Frequency (Hz)
0.1
0.01
0.1
100
HWA020
100
1
Sa (g)
Sa (g)
1
10
Frequency (Hz)
HWA050
1
0.1
0.01
0.1
1
10
Frequency (Hz)
0.1
0.01
0.1
100
HWA032
100
Sa (g)
1
0.1
1
10
Frequency (Hz)
0.01
0.1
HWA034
1
100
Sa (g)
Sa (g)
1
10
Frequency (Hz)
0.1
0.01
0.1
1
10
Frequency (Hz)
HWA002
HWA039
1
0.1
0.01
0.1
0.1
100
1
Sa (g)
0.01
0.1
1
10
Frequency (Hz)
HWA051
1
Sa (g)
100
1
10
Frequency (Hz)
100
TREIRS stations
0.1
0.01
0.1
1
10
Frequency (Hz)
100
Calculated
Observed
100
0921 Chichi
ILA Horizontal-component
ILA015
ILA001
1
10
Frequency (Hz)
1
Sa (g)
0.1
0.01
0.1
ILA054
1
Sa (g)
Sa (g)
1
0.1
0.01
0.1
100
1
10
Frequency (Hz)
0.1
0.01
0.1
100
1
10
Frequency (Hz)
ILA037
ILA003
1
Sa (g)
Sa (g)
1
0.1
0.01
0.1
1
10
Frequency (Hz)
0.1
0.01
0.1
100
ILA030
100
1
Sa (g)
Sa (g)
1
10
Frequency (Hz)
ILA056
1
0.1
0.01
0.1
1
10
Frequency (Hz)
0.1
0.01
0.1
100
ILA024
100
Sa (g)
1
0.1
1
10
Frequency (Hz)
ILA046
ILA010
100
1
Sa (g)
Sa (g)
1
10
Frequency (Hz)
0.1
0.01
0.1
1
10
Frequency (Hz)
ILA007
1
0.1
0.01
0.1
0.1
0.01
0.1
100
1
Sa (g)
0.01
0.1
1
10
Frequency (Hz)
ILA042
1
Sa (g)
100
1
10
Frequency (Hz)
100
TREIRS stations
0.1
0.01
0.1
1
10
Frequency (Hz)
100
Calculated
Observed
100
0921 Chichi
TAP Horizontal-component
TAP041
TAP007
TAP084
1
0.1
0.01
0.1
1
10
Frequency (Hz)
100
1
Sa (g)
Sa (g)
Sa (g)
1
0.1
0.01
0.1
1
10
Frequency (Hz)
100
0.1
0.01
0.1
1
10
Frequency (Hz)
TAP003
TAP059
1
Sa (g)
Sa (g)
1
0.1
0.01
0.1
1
10
Frequency (Hz)
0.1
0.01
0.1
100
TAP024
100
1
Sa (g)
Sa (g)
1
10
Frequency (Hz)
TAP103
1
0.1
0.01
0.1
1
10
Frequency (Hz)
0.1
0.01
0.1
100
TAP043
100
Sa (g)
1
0.1
1
10
Frequency (Hz)
TAP028
TAP053
1
10
Frequency (Hz)
100
Sa (g)
1
0.1
0.01
0.1
1
10
Frequency (Hz)
TAP020
1
0.1
0.01
0.1
0.1
0.01
0.1
100
Sa (g)
1
Sa (g)
0.01
0.1
1
10
Frequency (Hz)
TAP021
1
Sa (g)
100
1
10
Frequency (Hz)
TREIRS stations
100
0.1
0.01
0.1
1
10
Frequency (Hz)
Calculated
Observed
100
100
2
2
ILA-Horizontal
1
ln (OBS/CAL)
ln (OBS/CAL)
TAP-Horizontal
0
-1
-2
0.1
1
Frequency (Hz)
10
1
0
-1
-2
0.1
100
ln (OBS/CAL)
ln (OBS/CAL)
1
0
-1
1
Frequency (Hz)
10
100
10
100
-1
1
Frequency (Hz)
2
TTN-Horizontal
1
ln (OBS/CAL)
ln (OBS/CAL)
10
0
CHY-Horizontal
0
-1
1
Frequency (Hz)
10
100
10
100
2
KAU-Horizontal
ln (OBS/CAL)
100
1
-2
0.1
100
2
1
0
-1
-2
0.1
10
HWA-Horizontal
TCU-Horizontal
-2
0.1
Frequency (Hz)
2
2
-2
0.1
1
1
Frequency (Hz)
1
0
-1
-2
0.1
1
Frequency (Hz)
Conclusion
Combination of the two seismic
networks can provide rapid and
reliable estimation of strong ground
motion response spectra for
earthquakes in Taiwan.
Thank you very much