Supplementary
Material
File
Title:
2019 Ridgecrest Earthquake Reveals Areas of Los Angele
s that Amplify Shaking of High
-
R
ises
Authors:
M.
D.
Kohler, F. Filippitzis, T. Heaton, R. Clayton, R. Guy, J. Bunn,
K.
M. Chandy
This Supplementary
F
ile contains
seven
figures
cit
ed in the manuscript
’s
main t
ext.
2
3
Fig
ure
S1.
Spectral accelerations for the 2019
M
7.1 Ridgecrest earthquake in southern California.
Periods shown are: (A,B) 1
s, (C,D) 3 s, (E,F) 6 s, and (G,H) 8 s. Left column: Greater urban
Los Angeles region. Right column: Blow
-
up of the region inside the marked squares on the
left, showing detail. CSN stations=circles.
SCSN+CSMIP stations=diamonds. Note varying
amplitude sca
les
in colorbars
.
4
Figure
S2
. Relationship between
site
amplifications
(discussed in
main text) and Vs30 values
from
Thompson (2018
)
at each site
, also showing standard deviations for each site
.
Periods shown:
(A) 1 s; (B) 3 s; (C) 6 s; and (D) 8 s. CSN stations=open circles. SCSN+CSMIP stations=open
diamonds. Lines show least
-
squares
-
fit regression. Vertical axis is unitless.
5
Figure
S3
. Predicted spectral amplitudes
(
‘
SA
’
)
as a function of distanc
e for a scenario
M
7.1 earth-
quake for a soft soil site
using five Ground Motion Prediction E
quations
(Abrahamson
et al
.,
2014; Boore
et al
., 2014; Campbell and Bozorgnia, 2014; Chiou and Youngs, 2014; Idriss,
2014)
.
Periods shown: (A) 1 s; (B) 3 s; (C) 6 s; and (D) 8 s. ASK=
Abrahamson
et al
. (
2014
)
.
BSSA
=
Boore
et al
. (
2014
)
. CB=
Campbell and Bozorgnia (
2014
)
. CY
=
Chiou and Youngs
(
2014
). I=
Idriss (
2014
).
6
Figure
S4
. Predicted spectral amplitudes
(
‘
SA
’
)
as a function
of distance for a scenario
M
7.6
earth-
quake f
or a soft soil site using five Ground M
oti
on Prediction E
quations
(Abrahamson
et al
.,
2014; Boore
et al
., 2014; Campbell and Bozorgnia, 2014; Chiou and Youngs, 2014; Idriss,
2014)
.
Periods shown: (A) 1 s; (B) 3
s; (C) 6 s; and (D) 8 s.
ASK=Abrahamson
et al
. (2014).
BSSA
=
Boore
et al
. (2014). CB=Campbell and Bozorgnia (2014). CY
=
Chiou and Youngs
(2014). I=Idriss (2014).
7
Figure
S5
. Mean spectral amplitudes
(
‘
SA
’
)
as a function
of distance for a scenario
M
7.6
earth-
quake (
red
curve) and an
M
7.1 earthquake (blue
curve) for a soft soil site.
Periods shown: (A)
1 s; (B) 3 s; (C) 6 s; and (D
) 8 s. Means are from the five Ground Motion Prediction E
quation
curves
(Abrahamson
et al
., 2014; Boore
et al
., 2014; Campbell
and Bozorgnia, 2014; Chiou
and Youngs, 2014; Idriss, 2014)
shown in Figs. S3 and S4
.
8
Figure
S6
. Predicted spectral amplitudes
(
‘
SA
’
)
as a function of distance for a scenario
M
8 earth-
quake for a soft soil site
using five Ground Motion Prediction E
quations
(Abrahamson
et al
.,
2014; Boore
et al
., 2014; Campbell and Bozorgnia, 2014; Chiou and Youngs, 2014; Idriss,
2014)
.
Periods shown: (A) 1 s; (B) 3 s; (C) 6 s; and (D) 8 s.
ASK=Abrahamson
et al
. (2014).
BSSA
=
Boore
et al
. (2014). CB=Campbell and Bozorgnia (201
4). CY
=
Chiou and Youngs
(2014). I=Idriss (2014).
9
Figure
S7
.
Mean spectral amplitudes
(
‘
SA
’
)
as a function of distance for a scenario
M
8 earthquake
(red
curve) and an
M
7.1 earthquake (blue
curve) for a soft soil site.
Periods shown: (A) 1 s;
(B) 3 s; (C) 6 s; and (D
) 8 s. Means are from the five Ground M
o
tion Prediction E
quation
curves
(Abrahamson
et al
., 2014; Boore
et al
., 2014; Campbell and Bozorgnia, 2014; Chiou
and Youngs, 2014; Idriss, 2014)
shown in Figs. S3
and
S6
.