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  • Other Sources  (2)
  • Anza gap  (1)
  • ELECTRONICS AND ELECTRICAL ENGINEERING  (1)
  • Bowman-Birk inhibitor
  • 1
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    Delayed and Sustained Remote Triggering of Small Earthquakes in the San Jacinto Fault Region by the 2014 Mw 7.2 Papanoa, Mexico Earthquake (2021)
    Details
    Publication Date: 2021-09-03
    Description: We apply a move max matched-filter method to detect heightened seismicity triggered in the San Jacinto fault (SJF) zone, by the 2014 Mw 7.2 Papanoa, Mexico earthquake. The move max matched filter detects 5.4 and 1.7 times the number of earthquakes in the Southern California Seismic Network catalog and those detected by the matched-filter method, respectively. The seismicity rate increases significantly ~3.5 hr after the passage of the teleseismic waves and persists above the background level for about 1 week. This observation of delayed triggering may imply that dynamic stresses had initiated a time-dependent advance to failure or a secondary process. A highly active triggered patch is located ~10 km west of the SJF near Anza, on a previously unmapped fault. Focal mechanisms and a best fit plane suggest a normal fault perpendicular to the SJF. The unmapped fault may indicate higher seismic hazard in the surrounding areas if a large earthquake nucleated around the Anza seismic gap.
    Keywords: 551.22 ; 557 ; Southern California ; San Jacinto Fault ; triggering ; move max matched-filter ; unmapped fault ; Anza gap
    Language: English
    Type: article
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    CITATION GEO-LEO
  • 2
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    Portable microwave test packages for beam-waveguide antenna performance evaluations (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: Portable microwave test packages used to evaluate a new 34-m-diameter beam-waveguide (BWG) antenna are described. The experimental methodology involved transporting test packages to different focal points of the BWG system and making noise temperature, antenna efficiency, and holography measurements. Comparisons of data measured at the different focal points enabled determinations of performance degradations caused by various mirrors in the BWG system. It is shown that, due to remarkable stabilities and accuracies of radiometric data obtained through the use of the microwave test packages, degradations caused by the BWG system were successfully determined.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Type: IEEE Transactions on Microwave Theory and Techniques (ISSN 0018-9480); 40; 6, Ju
    Format: text
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    NASA TECHNICAL REPORTS
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