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  • 2010-2014  (10)
  • 1965-1969  (16)
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  • 1
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    In:  Bull. Seism. Soc. Am., Hokkaido University, Inst. f. Geophys., Ruhr-Univ. Bochum, vol. 55, no. 1, pp. 253-275, pp. B02403, (ISSN: 1340-4202)
    Publication Date: 1965
    Keywords: Fracture ; Seismology ; BSSA
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  • 2
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    In:  J. Geophys. Res., Hokkaido University, Inst. f. Geophys., Ruhr-Univ. Bochum, vol. 71, no. 1, pp. 4897-4904, pp. B02403, (ISSN: 1340-4202)
    Publication Date: 1966
    Keywords: Dislocation ; JGR
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  • 3
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    In:  Bull. Seism. Soc. Am., Hokkaido University, Inst. f. Geophys., Ruhr-Univ. Bochum, vol. 56, no. 1, pp. 577-592, pp. B02403, (ISSN: 1340-4202)
    Publication Date: 1966
    Keywords: Source ; Waves ; BSSA
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  • 4
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    In:  Bull. Seism. Soc. Am., Hokkaido University, Inst. f. Geophys., Ruhr-Univ. Bochum, vol. 59, no. 1, pp. 381-384, pp. B02403, (ISSN: 1340-4202)
    Publication Date: 1969
    Keywords: Elasticity theory of dislocations ; Dislocation ; BSSA
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  • 5
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    In:  Bull. Seism. Soc. Am., Hokkaido University, Inst. f. Geophys., Ruhr-Univ. Bochum, vol. 59, no. 1, pp. 1937-1948, pp. B02403, (ISSN: 1340-4202)
    Publication Date: 1969
    Keywords: Dislocation ; Earthquake ; BSSA
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  • 6
    Publication Date: 2014-07-02
    Description: Middleton Island, located at the seaward edge of the continental shelf 50 km from the base of the inner wall of the Aleutian Trench, affords an opportunity to make land-based measurements of uplift near the toe of the Prince William Sound megathrust, site of the 1964, M = 9.2, Alaska earthquake. Leveling surveys (1973–1993) on Middleton Island indicate roughly uniform tilting (~1 µrad/a down to the northwest) of the island and GPS surveys (1993–2012) show an uplift rate of 14 mm/a of the island relative to fixed North America. The data are consistent with a combined (coseismic and postseismic) uplift (in m) due to the 1964 earthquake as a function of time τ (years after the earthquake) u ( τ ) = ( 3 . 5  +  1 . 21 log 10 [ 1  +  1 . 67 τ ] ) H ( τ ) where 3.5 is the coseismic uplift and H ( τ ) is 0 for τ  〈 0 and 1 otherwise. The current uplift on Middleton Island is attributed to continuous slip on a fault splaying off from the megathrust, and the long-term uplift is the superposition of the effects of past earthquakes, each earthquake being similar to the 1964 event. Then, the predicted uplift at time t due to a sequence of earthquakes at times t i would be . From studies of strandlines associated with the uplifted terraces on Middleton Island, Plafker et al . [1992] estimated the occurrence times of the last six earthquakes and measured the present-day elevations of those strandlines. The predicted uplift is in rough agreement with those measurements. About half of the predicted uplift is due to postseismic relaxation from previous earthquakes.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 7
    Publication Date: 2013-01-05
    Description: [1]  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 sy stems 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 [2005]. 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 [2001]. Mapped traces of individual faults in the Mojave Block terminate within the block and do not continue across the Garlock Fault [ Dokka and Travis , 1990a]. © 2013 American Geophysical Union. All rights reserved.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 8
    Publication Date: 2013-08-17
    Description: [1]  The deformation across the Sierra Nevada Block, the Walker Lane Belt, and the Central Nevada Seismic Belt (CNSB) between 38.5°N and 40.5°N has been analyzed by clustering GPS velocities to identify coherent blocks. Cluster analysis determines the number of clusters required and assigns the GPS stations to the proper clusters. The clusters are shown 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. Four significant clusters are identified. Those clusters are strips separated by (from west to east) the Mohawk Valley-Genoa fault system, the Pyramid Lake-Wassuk fault system, and the Central Nevada Seismic Belt. The strain rates within the westernmost 3 clusters approximate simple right-lateral shear (~13 nstrain/a) across vertical planes roughly parallel to the cluster boundaries. Clustering does not recognize the longitudinal segmentation of the Walker Lane Belt into domains dominated by either northwesterly trending, right-lateral faults or northeasterly trending, left-lateral faults.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 9
    Publication Date: 2013-04-23
    Description: [1]  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 , ].
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 10
    Publication Date: 1966-10-15
    Print ISSN: 0148-0227
    Electronic ISSN: 2156-2202
    Topics: Geosciences
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