Details
| Original language | English |
|---|---|
| Pages (from-to) | 357-362 |
| Number of pages | 6 |
| Journal | TERRA NOVA |
| Volume | 24 |
| Issue number | 5 |
| Publication status | Published - Oct 2012 |
Abstract
Terra Nova, 24, 357-362, 2012 The friction coefficient is a key parameter for the slip evolution of faults, but how temporal changes in friction affect fault slip is still poorly known. By using three-dimensional numerical models with a thrust fault that is alternately locked and released, we show that variations in the friction coefficient affect both coseismic and long-term fault slip. Decreasing the friction coefficient by 5% while keeping the duration of the interseismic phase constant leads to a four-fold increase in coseismic slip, whereas a 5% increase nearly suppresses slip. A gradual decrease or increase of friction over several earthquake cycles (1-5% per earthquake) considerably alters the cumulative fault slip. In nature, the slip deficit (surplus) resulting from variations in the friction coefficient would presumably be compensated by a longer (shorter) interseismic phase, but the magnitude of the changes required for compensation render variations of the friction coefficient of >5% unlikely.
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geology
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: TERRA NOVA, Vol. 24, No. 5, 10.2012, p. 357-362.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Temporal variation in fault friction and its effects on the slip evolution of a thrust fault over several earthquake cycles
AU - Hampel, Andrea
AU - Hetzel, Ralf
PY - 2012/10
Y1 - 2012/10
N2 - Terra Nova, 24, 357-362, 2012 The friction coefficient is a key parameter for the slip evolution of faults, but how temporal changes in friction affect fault slip is still poorly known. By using three-dimensional numerical models with a thrust fault that is alternately locked and released, we show that variations in the friction coefficient affect both coseismic and long-term fault slip. Decreasing the friction coefficient by 5% while keeping the duration of the interseismic phase constant leads to a four-fold increase in coseismic slip, whereas a 5% increase nearly suppresses slip. A gradual decrease or increase of friction over several earthquake cycles (1-5% per earthquake) considerably alters the cumulative fault slip. In nature, the slip deficit (surplus) resulting from variations in the friction coefficient would presumably be compensated by a longer (shorter) interseismic phase, but the magnitude of the changes required for compensation render variations of the friction coefficient of >5% unlikely.
AB - Terra Nova, 24, 357-362, 2012 The friction coefficient is a key parameter for the slip evolution of faults, but how temporal changes in friction affect fault slip is still poorly known. By using three-dimensional numerical models with a thrust fault that is alternately locked and released, we show that variations in the friction coefficient affect both coseismic and long-term fault slip. Decreasing the friction coefficient by 5% while keeping the duration of the interseismic phase constant leads to a four-fold increase in coseismic slip, whereas a 5% increase nearly suppresses slip. A gradual decrease or increase of friction over several earthquake cycles (1-5% per earthquake) considerably alters the cumulative fault slip. In nature, the slip deficit (surplus) resulting from variations in the friction coefficient would presumably be compensated by a longer (shorter) interseismic phase, but the magnitude of the changes required for compensation render variations of the friction coefficient of >5% unlikely.
UR - http://www.scopus.com/inward/record.url?scp=84866014291&partnerID=8YFLogxK
U2 - 10.1111/j.1365-3121.2012.01073.x
DO - 10.1111/j.1365-3121.2012.01073.x
M3 - Article
AN - SCOPUS:84866014291
VL - 24
SP - 357
EP - 362
JO - TERRA NOVA
JF - TERRA NOVA
SN - 0954-4879
IS - 5
ER -