Bulletin of the Seismological Society of America; February 2006; v. 96; no. 1;
p. 90-106; DOI: 10.1785/0120050067
© Seismological Society of America
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Figure 6. Magnitude versus time since mainshock for aftershocks of Joshua Tree
m 6.1 (a), San Simeon m 6.5 (b), and
Landers m 7.3 earthquakes (c). The continuous line represents
the threshold magnitude estimated from
(15) and includes the effect of
all m 
5 earthquakes. The vertical lines in (c) are due to the
increase of mc(t) after large m
5 aftershocks. Dates of these earthquakes are shown in
Table 2.
