Environmental Engineering Reference
In-Depth Information
Rock site; M
w
= 6.5
1
0.1
Boore et al. (1993)
Campbell (1993)
Sadigh et al. (1993)
0.01
1
10
100
Distance to surface projection of rupture (km)
Rock site; M
w
= 8.0
1
FIGURE 11.17
Comparison of mean value PHGA
attenuation curves for
M
w
0.1
6.5 and
8.0 events on a strike-slip fault
calculated by three commonly used
attenuation relationships for western
United States. (From Munfakh, G. et
al.,
Geotechnical Earthquake
Engineering Reference Manual
, Report
No. FHWA-HI 99-012, FHA,
Arlington, VA, 1998, Chap. 4.)
Boore et al. (1993)
Campbell (1993)
Sadigh et al. (1993)
0.01
1
10
100
Distance to surface projection of rupture (km)
FIGURE 11.18
Comparison of areas of minor (I
VII) damage for four major U.S. earthquakes. The
damage area for the western half of the New Madrid event is inferred because there were no settlements in
the area at that time (
m
b
VI - VII) and major (I
surface wave magnitude). (After Nuttli, O.W.,
Reviews
in Engineering Geology,
Vol. IV, Geological Society of America, Boulder, Colorado, 1979, pp. 67-93.)
body wave magnitude;
m
s
