|
Frequency (Hz)
|
Peak ratio
|
Transverse peak delay time (s)
|
N
|
|---|
|
All JMA stations
|
|
0.5–1
|
0.32 ± 0.12
|
9.4 ± 6.3
|
134
|
|
1–2
|
0.35 ± 0.13
|
8.1 ± 4.2
|
140
|
|
2–4
|
0.36 ± 0.13
|
7.3 ± 2.8
|
136
|
|
4–8
|
0.39 ± 0.12
|
6.6 ± 3.0
|
109
|
|
JMA ground surface
|
|
0.5–1
|
0.34 ± 0.12
|
8.8 ± 6.2
|
77
|
|
1–2
|
0.40 ± 0.12
|
8.3 ± 4.7
|
82
|
|
2–4
|
0.42 ± 0.11
|
7.7 ± 3.1
|
79
|
|
4–8
|
0.43 ± 0.12
|
6.9 ± 2.7
|
58
|
|
JMA borehole
|
|
0.5–1
|
0.30 ± 0.11
|
10.4 ± 6.5
|
53
|
|
1–2
|
0.27 ± 0.09
|
8.0 ± 3.3
|
53
|
|
2–4
|
0.26 ± 0.09
|
6.7 ± 2.3
|
53
|
|
4–8
|
0.34 ± 0.10
|
6.3 ± 3.3
|
49
|
|
Hi-net all data
|
|
0.5–1
|
0.14 ± 0.11
|
10.7 ± 6.7
|
635
|
|
1–2
|
0.14 ± 0.10
|
8.6 ± 5.2
|
725
|
|
2–4
|
0.16 ± 0.11
|
7.0 ± 4.7
|
712
|
|
4–8
|
0.20 ± 0.14
|
6.5 ± 4.6
|
574
|
- N is the number of stations available. Some stations are unclassified on the JMA website. Hi-net numbers are from Table 1 of Nishimura (2012)
- We divide the data set into three categories (all JMA, ground surface, and borehole stations), as well as into different frequency bands
