Clustering of GPS velocities in the Mojave Block, southeastern California

Journal of Geophysical Research B: Solid Earth
By:  and 



We find subdivisions within the Mojave Block using cluster analysis to identify groupings in the velocities observed at GPS stations there. The clusters are represented on a fault map by symbols located at the positions of the GPS stations, each symbol representing the cluster to which the velocity of that GPS station belongs. Fault systems that separate the clusters are readily identified on such a map. The most significant representation as judged by the gap test involves 4 clusters within the Mojave Block. The fault systems bounding the clusters from east to west are 1) the faults defining the eastern boundary of the Northeast Mojave Domain extended southward to connect to the Hector Mine rupture, 2) the Calico-Paradise fault system, 3) the Landers-Blackwater fault system, and 4) the Helendale-Lockhart fault system. This division of the Mojave Block is very similar to that proposed by Meade and Hager. However, no cluster boundary coincides with the Garlock Fault, the northern boundary of the Mojave Block. Rather, the clusters appear to continue without interruption from the Mojave Block north into the southern Walker Lane Belt, similar to the continuity across the Garlock Fault of the shear zone along the Blackwater-Little Lake fault system observed by Peltzer et al. Mapped traces of individual faults in the Mojave Block terminate within the block and do not continue across the Garlock Fault [Dokka and Travis, ].

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Clustering of GPS velocities in the Mojave Block, southeastern California
Series title Journal of Geophysical Research B: Solid Earth
DOI 10.1029/2012JB009699
Volume 118
Issue 4
Year Published 2013
Language ENglish
Publisher AGU
Contributing office(s) Earthquake Science Center
Description 13 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Journal of Geophysical Research B: Solid Earth
First page 1747
Last page 1759
Country United States
State California
Other Geospatial Mojave Block
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