Surface rupture during the 2010 Mw 7.1 Darfield (Canterbury) earthquake: Implications for fault rupture dynamics and seismic-hazard analysis

被引：175

作者：

Quigley, M. ^{[1
]}

Van Dissen, R. ^{[2
]}

Litchfield, N. ^{[2
]}

Villamor, P. ^{[2
]}

Duffy, B. ^{[1
]}

Barrell, D. ^{[3
]}

Furlong, K. ^{[4
]}

Stahl, T. ^{[1
]}

Bilderback, E. ^{[1
]}

Noble, D. ^{[1
]}

机构：

[1] Univ Canterbury, Dept Geol Sci, Christchurch 8140, New Zealand

[2] GNS Sci, Lower Hutt 5040, New Zealand

[3] GNS Sci, Dunedin 9016, New Zealand

[4] Penn State Univ, Dept Geosci, University Pk, PA 16802 USA

来源：

GEOLOGY | 2012年 / 40卷 / 01期

关键词：

CALIFORNIA; MAGNITUDE; VALLEY;

D O I：

10.1130/G32528.1

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

The September 2010 M-w 7.1 Darfield (Canterbury) earthquake in New Zealand is one of the best-recorded earthquakes of this magnitude. The earthquake occurred on a previously unidentified fault system and generated a 29.5 +/- 0.5-km-long surface rupture across a low-relief agricultural landscape. High-accuracy measurements of coseismic displacements were obtained at over 100 localities along the Greendale fault. Maximum net displacement (D-max) (5.3 +/- 0.5 m) and average net displacement (D-avg) (2.5 +/- 0.1 m) are anomalously large for an earthquake of this M-w.D-max/surface rupture length (SRL) and D-avg/SRL ratios are among the largest ever recorded for a continental strike-slip earthquake. "Geologically derived" estimates of moment magnitude (M-w(G)) are less than the seismologically derived M-w, derived using widely employed SRL-M-w scaling regressions. M-w(G) is greater than M-w using D-max- and D-avg-M-w regressions. The "geologically derived" static stress drop of 13.9 +/- 3.7 MPa provides a context with which to compare this earthquake rupture to interplate and intraplate ruptures of similar M-w. This data set provides fundamental information on fault rupture processes relevant to seismic-hazard modeling in this region and analogous settings globally.

引用

页码：55 / 58

页数：4

共 23 条

[11] MECHANICS OF EARTHQUAKES [J].

KANAMORI, H .

ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES, 1994, 22 :207-237

[12] IMPLICATIONS OF STRESS-DROP MODELS OF EARTHQUAKES FOR INVERSION OF STRESS DROP FROM SEISMIC OBSERVATIONS [J].

MADARIAGA, R .

PURE AND APPLIED GEOPHYSICS, 1977, 115 (1-2) :301-316

[13]

Pettinga J., 2001, Bulletin of the New Zealand Society for Earthquake Engineering, V34, P282

[14]

Prentice CS, 2010, NAT GEOSCI, V3, P789, DOI [10.1038/NGEO991, 10.1038/ngeo991]

[15] Interactions between the Landers and Hector Mine, California, earthquakes from space geodesy, boundary element modeling, and time-dependent friction [J].

Price, EJ ;

Bürgmann, R .

BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA, 2002, 92 (04) :1450-1469

[16] SURFACE RUPTURE OF THE GREENDALE FAULT DURING THE DARFIELD (CANTERBURY) EARTHQUAKE, NEW ZEALAND: INITIAL FINDINGS [J].

Quigley, M. ;

Van Dissen, R. ;

Villamor, P. ;

Litchfield, N. ;

Barrell, D. ;

Furlong, K. ;

Stahl, T. ;

Duffy, B. ;

Bilderback, E. ;

Noble, D. ;

Townsend, D. ;

Begg, J. ;

Jongens, R. ;

Ries, W. ;

Claridge, J. ;

Klahn, A. ;

Mackenzie, H. ;

Smith, A. ;

Hornblow, S. ;

Nicol, R. ;

Cox, S. ;

Langridge, R. ;

Pedley, K. .

BULLETIN OF THE NEW ZEALAND SOCIETY FOR EARTHQUAKE ENGINEERING, 2010, 43 (04) :236-242

[17] Paleoseismology of the Johnson Valley, Kickapoo, and Homestead Valley faults: Clustering of earthquakes in the eastern California shear zone [J].

Rockwell, TK ;

Lindvall, S ;

Herzberg, M ;

Murbach, D ;

Dawson, T ;

Berger, G .

BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA, 2000, 90 (05) :1200-1236

[18]

Sibson R., 2011, GEOLOGICAL IN PRESS

[19]

TERRES RR, 1981, B SEISMOL SOC AM, V71, P1593

[20]

TRIFUNAC MD, 1970, B SEISMOL SOC AM, V60, P137

← 1 2 3 →