1.12 Takahashi et al. (2000)

1) Reference

T. Takahashi, S. Kobayashi, Y. Fukushima, J. X. Zhao, H. Nakamura and P. G. Somerville, 2000, A Spectral Attenuation Model for Japan using Strong Ground Motion Data Base, Proceedings of 6th International Conference on Seismic Zonation, CD-ROM.

 

2) Estimated physical parameter

- Peak ground acceleration (Horizontal)

- Acceleration response spectra (h=5%, T=0.05 to 5 sec) (Horizontal)

 

3) Used strong motion data

- Area: Japan

- Type of earthquake:

- Period:

- Number of events:

- Number of records: 1166 records

- Magnitude: 5.0 – 8.25

- Epicentral distance: 0.8 – 300 km

and supplementary at near source region,

- Area: California, Chile

- Type of earthquake:

- Period:

- Number of events:

- Number of records: 116 from California and 2 from Chile

- Magnitude: 5.8 – 8.0

- Epicentral distance: 1 – 200 km

 

4) Style of faulting

Not specified

 

5) Ground condition

(a) Rock

(b) Hard Soil

(c) Medium Soil

(d) Soft Soil

 

 

6) Definition of magnitude

Moment magnitude

 

7) Definition of source distance

- Shortest distance to the rupture zone or

- Hypocentral distance

 

8) Definition of horizontal component

Geometric mean of two perpendicular horizontal components

 

9) Applicability written in the paper

Not specified

 

10) Empirical attenuation formula

 

Table 1.12.1  Model parameters derived from all data

Period

a

b

c

d

e

s

t

sT

S

SR

SH

SM

SS

PGA

0.446

0.00350

0.012

0.446

0.00665

0.135

0.203

0.244

0.941

0.751

0.901

1.003

0.995

0.05

0.424

0.00418

0.020

0.420

0.00704

0.140

0.208

0.251

-0.868

-1.047

-0.876

-0.815

-0.831

0.10

0.428

0.00502

0.025

0.420

0.00760

0.142

0.229

0.269

-0.351

-0.531

-0.348

-0.309

-0.341

0.15

0.443

0.00476

0.033

0.399

0.00754

0.141

0.212

0.255

-0.234

-0.398

-0.256

-0.175

-0.221

0.20

0.457

0.00424

0.032

0.396

0.00769

0.140

0.204

0.247

-0.217

-0.392

-0.262

-0.138

-0.191

0.25

0.453

0.00372

0.036

0.374

0.00560

0.142

0.189

0.236

-0.157

-0.355

-0.224

-0.071

-0.106

0.30

0.444

0.00327

0.039

0.358

0.00527

0.145

0.192

0.241

-0.083

-0.288

-0.164

0.011

-0.016

0.40

0.460

0.00264

0.040

0.351

0.00408

0.145

0.188

0.238

-0.158

-0.375

-0.269

-0.055

-0.054

0.50

0.467

0.00230

0.040

0.342

0.00438

0.141

0.186

0.234

-0.202

-0.427

-0.342

-0.095

-0.054

0.60

0.484

0.00203

0.040

0.338

0.00373

0.144

0.181

0.231

-0.317

-0.565

-0.459

-0.208

-0.146

0.70

0.493

0.00193

0.040

0.319

0.00303

0.149

0.179

0.233

-0.377

-0.640

-0.530

-0.268

-0.203

0.80

0.511

0.00186

0.040

0.315

0.00394

0.146

0.188

0.238

-0.501

-0.780

-0.645

-0.396

-0.315

0.90

0.527

0.00169

0.040

0.315

0.00410

0.147

0.184

0.235

-0.614

-0.902

-0.754

-0.517

-0.412

1.00

0.542

0.00148

0.040

0.316

0.00398

0.143

0.191

0.239

-0.740

-1.038

-0.874

-0.649

-0.523

1.25

0.573

0.00135

0.040

0.295

0.00379

0.130

0.210

0.247

-1.006

-1.271

-1.136

-0.927

-0.811

1.50

0.604

0.00139

0.040

0.292

0.00300

0.121

0.212

0.245

-1.243

-1.523

-1.359

-1.157

-1.076

2.00

0.636

0.00090

0.040

0.292

0.00160

0.118

0.207

0.238

-1.545

-1.807

-1.658

-1.458

-1.398

2.50

0.646

0.00043

0.040

0.307

0.00178

0.121

0.175

0.213

-1.690

-1.923

-1.771

-1.619

-1.548

3.00

0.648

0.00050

0.040

0.305

0.00000

0.105

0.199

0.225

-1.726

-1.943

-1.793

-1.662

-1.598

4.00

0.649

0.00000

0.040

0.330

0.00000

0.106

0.154

0.187

-1.841

-1.998

-1.918

-1.764

-1.733

5.00

0.649

0.00000

0.040

0.341

0.00000

0.082

0.202

0.218

-1.839

-1.949

-1.910

-1.760

-1.754