Time interval of earthquake recurrence for strike - slip fault |
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Authors: | Shande Pan and Jin Ma |
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Institution: | (1) Institute of Geology, State Seismological Bureau, 100029 Beijing, China |
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Abstract: | On the basis of fault’s dynamic model of Knopoffet al. (1973), this paper has finally obtained a simple approximate formula to be able to estimate the recurrence time intervalT
R
of earthquake on strike-slip fault. Preliminary result holds thatμ andδ
s
— δ
f
have not much effect onT
R
. Leta is the ratio of the coseismic displacementD
s
to the total displacementD
t
in whole event course, i.e.,a =D
s
/D
t
, thena = 1/3 may represent the standard theoretical state in whichT
R
is independent onμ andδ
s
— δ
f
. At this time,T
R
is the arithmetic average ofs
0/v andkd/β, wheres
0 is the long-term preseismic accumulated slippage,v is fault’s average displacement rate,d is the fracture length on the fault of seismic focal region andβ is shear wave velocity. In addition,k =υ
0/aυ, whereυ
0 is the initial fracture velocity of actual structure at the coseismic instant.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,14, 187–194, 1992.
This paper is a part of contracted item of State Seismological Bureau — Tectonic Physical Study of Earthquake Recurrence Period
and Characteristic Magnitude. |
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Keywords: | earthquake recurrence strike-slip fault recurrence time interval |
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