Journal article Open Access

Source parameters for the 1952 Kern County earthquake, California: A joint inversion of leveling and triangulation observations

Bawden, Gerald W.

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{
"DOI": "10.1029/2000jb900315",
"author": [
{
"family": "Bawden, Gerald W."
}
],
"issued": {
"date-parts": [
[
2001,
1,
10
]
]
},
"abstract": "Coseismic leveling and triangulation observations are used to determine the faulting geometry and slip distribution of the July 21, 1952, Mw 7.3 Kern County earthquake on the White Wolf fault. A singular value decomposition inversion is used to assess the ability of the geodetic network to resolve slip along a multisegment fault and shows that the network is sufficient to resolve slip along the surface rupture to a depth of 10 km. Below 10 km, the network can only resolve dip slip near the fault ends. The preferred source model is a two\u2010segment right\u2010stepping fault with a strike of 51\u00b0 and a dip of 75\u00b0 SW. The epicentral patch has deep (6\u201327 km) left\u2010lateral oblique slip, while the northeastern patch has shallow (1\u201312.5 km) reverse slip. There is nearly uniform reverse slip (epicentral, 1.6 m; northeast, 1.9 m), with 3.6 m of left\u2010lateral strike slip limited to the epicentral patch. The seismic moment is M0 = 9.2 \u00b1 0.5 \u00d7 1019 N m (Mw = 7.2). The signal\u2010to\u2010noise ratio of the leveling and triangulation data is reduced by 96% and 49%, respectively. The slip distribution from the preferred model matches regional geomorphic features and may provide a driving mechanism for regional shortening across the Comanche thrust and structural continuity with the Scodie seismic lineament to the northeast.",
"title": "Source parameters for the 1952 Kern County earthquake, California: A joint inversion of leveling and triangulation observations",
"type": "article-journal",
"id": "1231281"
}
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