Loading [MathJax]/extensions/tex2jax.js

Temporal variation in fault friction and its effects on the slip evolution of a thrust fault over several earthquake cycles

Research output: Contribution to journalArticleResearchpeer review

Authors

Plum Print visual indicator of research metrics
  • Citations
    • Citation Indexes: 9
  • Captures
    • Readers: 27
see details

Details

Original languageEnglish
Pages (from-to)357-362
Number of pages6
JournalTERRA NOVA
Volume24
Issue number5
Publication statusPublished - 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

Temporal variation in fault friction and its effects on the slip evolution of a thrust fault over several earthquake cycles. / Hampel, Andrea; Hetzel, Ralf.
In: TERRA NOVA, Vol. 24, No. 5, 10.2012, p. 357-362.

Research output: Contribution to journalArticleResearchpeer review

Download
@article{613ebdd4ee6c479c9d8678c29438ea9b,
title = "Temporal variation in fault friction and its effects on the slip evolution of a thrust fault over several earthquake cycles",
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.",
author = "Andrea Hampel and Ralf Hetzel",
year = "2012",
month = oct,
doi = "10.1111/j.1365-3121.2012.01073.x",
language = "English",
volume = "24",
pages = "357--362",
journal = "TERRA NOVA",
issn = "0954-4879",
publisher = "John Wiley and Sons Inc.",
number = "5",

}

Download

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 -

By the same author(s)