1.20 Sunuwar et al. (2004)

1)      Reference

Laxman Sunuwar, Carlos Cuadr and Madan B. Karkee, 2004, Strong Ground Motion Attenuation In The Sea Of Japan (Okhotsk-Amur Plates Boundary) Region, 13th World conference on Earthquake Engineering Vancouver, B.C., Canada, August 1-6, Paper No. 197.

 

2)      Estimated physical parameter

- Peak ground acceleration (Horizontal, Vertical)

- Response spectral acceleration (h=5%, T=0.05 to 3.00 sec) (Horizontal, Vertical)

 

3)      Used strong motion data

- Area: Eastern margin of Sea of Japan (K-NET)

- Type of earthquake:

- Period: 1996-2003 years

- Number of events: 42

- Number of records: 667

- Magnitude: 4.0-5.6

- Epicentral distance: 3-264km

 

4)      Style of faulting

Not specified

 

5)      Ground condition

Not specified

 

6)      Definition of magnitude

JMA (Japan Meteorological Agency) magnitude

 

7)      Definition of source distance

Hypocentral distance

 

8)      Definition of horizontal components

Maximum of two horizontal components

 

9)      Applicability written in the paper

Not specified

 

10)  Empirical attenuation formula

[αlogR model]

           σ=0.303

              σ=0.301

 

[αR-logR model]

       σ=0.309

        σ=0.311

Y(T): maximum amplitude of the response spectra or ground acceleration

PHGA: peak horizontal ground acceleration

           PVGA: peak vertical ground acceleration

           Mj: JMA magnitude

           D: focal depth (km)

           R: hypocentral distance

           σ: standard deviation

 

 

Table 1.20-1 Coefficients for response spectral acceleration