Assessing slope stability in the Santa Barbara Basin, California, using seafloor geodesy and CHIRP seismic data

被引：30

作者：

Blum, J. A. ^{[1
]}

Chadwell, C. D. ^{[1
]}

Driscoll, N. ^{[1
]}

Zumberge, M. A. ^{[1
]}

机构：

[1] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2010年 / 37卷

关键词：

SUBMARINE LANDSLIDES; CONTINENTAL BORDERLAND; SOUTHERN CALIFORNIA; EARTHQUAKE HISTORY; CHANNEL; DYNAMICS; FAILURE; PROJECT; FAULT;

D O I：

10.1029/2010GL043293

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Seafloor slope instability in the Santa Barbara Basin, California, poses risk to the region. Two prominent landslides, the Goleta and Gaviota slides, occupy the northern flank, with a scarp-like crack extending east from the headwall of the Gaviota slide towards the Goleta complex. Downslope creep across the crack might indicate an imminent risk of failure. Sub-bottom CHIRP profiles with <1 m accuracy across the crack exhibit no evidence of internal deformation. Daily seafloor acoustic range measurements spanning the crack detected no significant motion above a 99% confidence level of +/- 7 mm/yr over two years of monitoring. These disparate data over different timescales suggest no active creep and that the crack is likely a relict feature that formed concomitantly with the Gaviota slide. Citation: Blum, J. A., C. D. Chadwell, N. Driscoll, and M. A. Zumberge (2010), Assessing slope stability in the Santa Barbara Basin, California, using seafloor geodesy and CHIRP seismic data, Geophys. Res. Lett., 37, L13308, doi: 10.1029/2010GL043293.

引用

页数：4

共 32 条

[1] Recording Earth strain with optical fibers [J].

Blum, John A. ;

Nooner, Scott L. ;

Zumberge, Mark A. .

IEEE SENSORS JOURNAL, 2008, 8 (7-8) :1152-1160

[2] Tsunamis within the eastern Santa Barbara Channel [J].

Borrero, JC ;

Dolan, JF ;

Synolakis, CE .

GEOPHYSICAL RESEARCH LETTERS, 2001, 28 (04) :643-646

[3] Slope failure dynamics and impacts from seafloor and shallow sub-seafloor geophysical data: case studies from the COSTA project [J].

Canals, M ;

Lastras, G ;

Urgeles, R ;

Casamor, JL ;

Mienert, J ;

Cattaneo, A ;

De Batist, M ;

Haflidason, H ;

Imbo, Y ;

Laberg, JS ;

Locat, J ;

Long, D ;

Longva, O ;

Masson, DG ;

Sultan, N ;

Trincardi, F ;

Bryn, P .

MARINE GEOLOGY, 2004, 213 (1-4) :9-72

[4] Plate motion at the ridge-transform boundary of the south Cleft segment of the Juan de Fuca Ridge from GPS-Acoustic data [J].

Chadwell, C. David ;

Spiess, Fred N. .

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 2008, 113

[5] No spreading across the southern Juan de Fuca Ridge axial cleft during 1994-1996 [J].

Chadwell, CD ;

Hildebrand, JA ;

Spiess, FN ;

Morton, JL ;

Normark, WR ;

Reiss, CA .

GEOPHYSICAL RESEARCH LETTERS, 1999, 26 (16) :2525-2528

[6] Vertical deformation monitoring at Axial Seamount since its 1998 eruption using deep-sea pressure sensors [J].

Chadwick, WW ;

Nooner, SL ;

Zumberge, MA ;

Embley, RW ;

Fox, CG .

JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, 2006, 150 (1-3) :313-327

[7] SPACE-AGE GEODESY - THE NASA CRUSTAL DYNAMICS PROJECT [J].

COATES, RJ ;

FREY, H ;

MEAD, GD ;

BOSWORTH, JM .

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 1985, 23 (04) :360-368

[8]

DINGLER JA, 2007, THESIS U CALIF SAN D

[9] Paleoseismologic evidence for a very large (Mw >7), post-AD 1660 surface rupture on the eastern San Cayetano fault, Ventura County, California:: Was this the elusive source of the damaging 21 December 1812 earthquake? [J].

Dolan, JF ;

Rockwell, TK .

BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA, 2001, 91 (06) :1417-1432

[10]

EDWARDS BD, 1995, J SEDIMENT RES A, V65, P57

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