85.5 SAC2000: Signal processing and analysis tools for seismologists and engineers

Goldstein, Peter; Dodge, D. A.; Firpo, M; Minner, L.

doi:10.1016/s0074-6142(03)80284-x

Cited by 426 publications

(236 citation statements)

References 3 publications

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“…Direct P-wave energy is dominant on the Z component and Ps energy dominates the R component. In this study, we used seismic analysis code (SAC; Goldstein et al, 2003;Goldstein and Snoke, 2005) to perform the instrument correction and rotation procedures. The incident angle, azimuth, back azimuth, and distance of the earthquake can be calculated automatically by SAC; it just requires the arrival time of the P wave and the incident angles and azimuths of all components added in the header of the records.…”

Section: Receiver Functionsmentioning

confidence: 99%

Estimation of the crustal structure in Central Anatolia (Turkey) using receiver functions

Çıvgın¹,

Kaypak²

2017

Turkish J Earth Sci

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IntroductionThe region called Central Anatolia is a part of the Anatolian plate, bordered between the North Anatolian Fault zone (NAFZ) and the East Anatolian Fault zone (EAFZ) (Figure 1a). The Anatolian plate moves westwards, turning counterclockwise along the Bitlis-Zagros suture zone (BSZS) due to the north-northwest movement of the Arabian plate and the northward movement of the African plate relative to the Eurasian plate (e.g., McKenzie, 1972;Ergün et al., 1995;McClusky et al., 2000).The crustal structure of Central Anatolia has been studied by various researchers and several models have been developed. Some of them assert that the crustal thickness of the Anatolian plate gets thinner from east to west (e.g.,

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Section: Receiver Functionsmentioning

confidence: 99%

Estimation of the crustal structure in Central Anatolia (Turkey) using receiver functions

Çıvgın¹,

Kaypak²

2017

Turkish J Earth Sci

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“…We acknowledge the following FDSN network operators for the data: AF AK AT AU AV CH CN CZ DK EI FR G GB GE GR GT HL IC II IM IU JP KG KN KO KR KZ LX MI MN MY NJ NL NO OE PL PM PS RO SS SY TA TT UK US XI2010 XS2008 ZC2008 ZE2008. Data pre-processing and part of the analysis were performed using Seismic Analysis Code, version 100 (Goldstein et al 2003). All plots were made using the Generic Mapping Tools version 4.0 (www.soest.hawaii.edu/gmt; Wessel & Smith (1998).…”

Section: A C K N O W L E D G E M E N T Smentioning

confidence: 99%

The 2015 April 25 Gorkha (Nepal) earthquake and its aftershocks: implications for lateral heterogeneity on the Main Himalayan Thrust

Kumar¹,

Singh²,

Mitra³

et al. 2016

Geophys. J. Int.

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S U M M A R YThe 2015 Gorkha earthquake (M w 7.8) occurred by thrust faulting on a ∼150 km long and ∼70 km wide, locked downdip segment of the Main Himalayan Thrust (MHT), causing the Himalaya to slip SSW over the Indian Plate, and was followed by major-to-moderate aftershocks. Back projection of teleseismic P-wave and inversion of teleseismic body waves provide constraints on the geometry and kinematics of the main-shock rupture and source mechanism of aftershocks. The main-shock initiated ∼80 km west of Katmandu, close to the locking line on the MHT and propagated eastwards along ∼117 • azimuth for a duration of ∼70 s, with varying rupture velocity on a heterogeneous fault surface. The main-shock has been modelled using four subevents, propagating from west-to-east. The first subevent (0-20 s) ruptured at a velocity of ∼3.5 km s −1 on a ∼6 • N dipping flat segment of the MHT with thrust motion. The second subevent (20-35 s) ruptured a ∼18 • W dipping lateral ramp on the MHT in oblique thrust motion. The rupture velocity dropped from 3.5 km s −1 to 2.5 km s −1 , as a result of updip propagation of the rupture. The third subevent (35-50 s) ruptured a ∼7 • N dipping, eastward flat segment of the MHT with thrust motion and resulted in the largest amplitude arrivals at teleseismic distances. The fourth subevent (50-70 s) occurred by left-lateral strikeslip motion on a steeply dipping transverse fault, at high angle to the MHT and arrested the eastward propagation of the main-shock rupture. Eastward stress build-up following the mainshock resulted in the largest aftershock (M w 7.3), which occurred on the MHT, immediately east of the main-shock rupture. Source mechanisms of moderate aftershocks reveal stress adjustment at the edges of the main-shock fault, flexural faulting on top of the downgoing Indian Plate and extensional faulting in the hanging wall of the MHT.

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“…We adopt the definition by Lee et al (2015) to calculate the ESD in order to quantify the fit of our developed models. The SAC (SEISMIC ANALYSIS CODE; Goldstein et al 2003) differentiation routine was applied to obtain the acceleration waveforms to calculate the simulated ESD. Figure 9 shows a comparison between the simulated and observed ESD values.…”

Section: Number Of Time Steps 20000 Simulation Time (S) 60mentioning

confidence: 99%

Simulating Shallow Soil Response Using Wave Propagation Numerical Modelling in the Western Plain of Taiwan

Chen¹,

Kuo²,

Wen³

et al. 2016

Terr. Atmos. Ocean. Sci.

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This study used the results from 45 microtremor array measurements to construct a shallow shear wave velocity structure in the western plain of Taiwan. We constructed a complete 3D velocity model based on shallow and tomography models for our numerical simulation. There are three major subsurfaces, engineering bedrock (V S = 600 m s -1 ), Pliocene formation and Miocene formation, constituted in the shallow model. The constant velocity is given in each subsurface. We employed a 3D-FD (finite-differences) method to simulate seismic wave propagation in the western plain. The aim of this study was to perform a quantitative comparison of site amplifications and durations obtained from empirical data and numerical modelling in order to obtain the shallow substructure soil response. Modelling clearly revealed that the shallow substructure plays an important role in strong ground motion prediction using 3D simulation. The results show significant improvements in effective shaking duration and the peak ground velocity (PGV) distribution in terms of the accuracy achieved by our developed model. We recommend a high-resolution shallow substructure as an essential component in future seismic hazard analyses.

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85.5 SAC2000: Signal processing and analysis tools for seismologists and engineers

Cited by 426 publications

References 3 publications

Estimation of the crustal structure in Central Anatolia (Turkey) using receiver functions

Estimation of the crustal structure in Central Anatolia (Turkey) using receiver functions

The 2015 April 25 Gorkha (Nepal) earthquake and its aftershocks: implications for lateral heterogeneity on the Main Himalayan Thrust

Simulating Shallow Soil Response Using Wave Propagation Numerical Modelling in the Western Plain of Taiwan

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