1.22 Takai et al. (2004)

1)      Reference

Nobuo Takai, Gaku Shimizu and Shigeyuki Okada, New Attenuation Formula of Earthquake Ground Motions Passing Though The Volcanic Front, 2004 13th World Conference on Earthquake Engineering Vancouver, B.C., Canada August 1-6, Paper No. 731.

 

2)      Estimated physical parameter

- Peak ground acceleration (Horizontal)

- Intensity (JMA Intensity)

 

3)      Used strong motion data

- Area: Northern Japan (Tohoku, Hokkaido)

- Type of earthquake:

- Period: 1997-2003 years

- Number of events: 65

- Number of records:  

- Magnitude: MJ5.0-8.0

- Epicentral distance:< 500km

 

4)      Style of faulting

(a)   Shallow crustal

(b)   Intra-plate (Slab)

(c)    Inter-plate

 

5)      Ground condition

Not specified

 

6)      Definition of magnitude

JMA (Japan Meteorological Agency) Magnitude

 

7)      Definition of source distance

Δ1: distance from the epicenter to V.F.

Δ2: distance from V.F. to the observation points

R1:

R2:

 

 

 

 

 

 

 

 

 

 

 


Figure 1.22-1 Projective transformation for real distance from epicentral distance

 

 

8)      Definition of horizontal components

Not specified

 

9)      Applicability written in the paper

Not specified

 

10)  Empirical attenuation formula

[For Intra-plate]

PGA: peak ground acceleration

              MJMA: JMA magnitude

        

           I: JMA intensity

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


Figure 1.22-2 Attenuation curved surface in the case of M8