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Table 1 List of temporary seismic stations and one permanent seismic station with site information from surficial geological data and seismic data

From: Local site effects in Kumamoto City revealed by the 2016 Kumamoto earthquake

Code

Lat. (N)

Long. (E)

Start (JST)

End (JST)

Geology

Vs30 (m/s)

Wald and Allen (2007)

J-SHIS

KR01

32.77614

130.68556

2016/04/16 02PM

2016/05/19 00PM

Alluvium

240–300

155.4

KR02

32.78184

130.68575

2016/04/15 06PM

2016/05/19 02PM

Alluvium

490–620

271.0

KR03

32.78511

130.68549

2016/04/16 02PM

2016/04/21 11AM

Alluvium

490–620

278.7

KR04

32.78787

130.68690

2016/04/15 07PM

2016/05/19 03PM

Alluvium

490–629

298.2

KR05

32.80654

130.69441

2016/04/16 01PM

2016/05/19 01PM

Alluvium

360–490

235.8

KR06

32.83141

130.69463

2016/04/16 00PM

2016/05/19 01PM

Pyroclastic flow deposits

620–760

405.6

KU.KMP1

32.81980

130.62270

Permanent station

 

Early pleistocene products (Ko-kinbo volcanic rocks)

760

510.4

Epicentral distance (km)

Maximum amplitude 2016/04/18 20:41 (JST) Mj5.8

Site amplification factors using weak motion data

2016/04/16 (JST) Mj7.3

2016/04/18 20:41 (JST) Mj5.8

Horizontal acceleration (cm/s2)

Horizontal velocity (cm/s)

Fundamental frequency (Hz)

Peak amplitude

Amplification over a range of frequencies (s)

0.1–0.2

0.2–0.5

0.5–1

1–2

7.64

54.24

14.69

1.24

1.17

2.96

1.40

1.78

1.84

1.92

7.85

53.93

25.19

1.87

1.17

3.86

2.60

2.95

2.57

2.47

8.01

53.79

26.92

1.54

2.73

5.02

2.35

3.50

1.79

1.36

8.03

53.53

20.70

1.52

1.17

2.92

2.43

3.12

2.48

2.01

8.63

52.00

14.86

1.33

1.75

2.62

1.26

2.11

2.50

1.80

10.66

50.89

10.32

1.13

1.17

2.55

0.87

1.50

1.66

1.79

15.00

57.63

8.55

0.85

  1. Epicentral distances and the maximum amplitudes at the seismic stations for the 2016 Kumamoto earthquake and an aftershock (Mj 5.8) of that earthquake are indicated