Software documentation - The lifeline of computer programs

King, Sandy; Potts, B.

doi:10.2514/6.1981-2255

Cited by 3 publications

(5 citation statements)

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“…In order to constrain the amplitude of the surface deformation history during the first days following the earthquake as suggested by Langbein et al 84 , we processed the 30s sampling rate data using the GAMIT 10.4 tool suite 66 . The maximum static displacement at the surface is equal to ~5 cm ( Figure 2 ).…”

Section: Resultsmentioning

confidence: 99%

“…This approach has already been used to detect atmosphere disturbances caused by atmospheric volcanic explosions 36 37 or seismic wave propagation in the far field 23 . First, we processed all 1 Hz GPS data available (13 sites) using GAMIT 10.4 66 . We then extracted the LC phase residuals for which the ionosphere contribution has been minimized.…”

Section: Resultsmentioning

confidence: 99%

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GPS source solution of the 2004 Parkfield earthquake

Houlié

Dreger²,

Kim

2014

Sci Rep

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We compute a series of finite-source parameter inversions of the fault rupture of the 2004 Parkfield earthquake based on 1 Hz GPS records only. We confirm that some of the co-seismic slip at shallow depth (<5 km) constrained by InSAR data processing results from early post-seismic deformation. We also show 1) that if located very close to the rupture, a GPS receiver can saturate while it remains possible to estimate the ground velocity (~1.2 m/s) near the fault, 2) that GPS waveforms inversions constrain that the slip distribution at depth even when GPS monuments are not located directly above the ruptured areas and 3) the slip distribution at depth from our best models agree with that recovered from strong motion data. The 95th percentile of the slip amplitudes for rupture velocities ranging from 2 to 5 km/s is ~55 ± 6 cm.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

GPS source solution of the 2004 Parkfield earthquake

Houlié

Dreger²,

Kim

2014

Sci Rep

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“…All calculation have been completed using the GAMIT/GLOBK Tool suite 36 37 , following a standard procedure for large static networks (the network is not affected by co-seismic offsets) We have extracted residuals that could not be explained by tides, GPS constellation cycle slip, or tropospheric and ionospheric perturbations.…”

Section: Methodsmentioning

confidence: 99%

“… The four residuals of the four signals received at site i and j are computed using GAMIT 36 . Because Rayleigh waves are not arriving at the same time to both sites, the residuals of the Double Difference are not equal to zero.…”

Section: Figurementioning

confidence: 99%

New approach to detect seismic surface waves in 1Hz-sampled GPS time series

Houlié

Occhipinti

Blanchard

et al. 2011

Sci Rep

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Recently, co-seismic seismic source characterization based on GPS measurements has been completed in near- and far-field with remarkable results. However, the accuracy of the ground displacement measurement inferred from GPS phase residuals is still depending of the distribution of satellites in the sky. We test here a method, based on the double difference (DD) computations of Line of Sight (LOS), that allows detecting 3D co-seismic ground shaking. The DD method is a quasi-analytically free of most of intrinsic errors affecting GPS measurements. The seismic waves presented in this study produced DD amplitudes 4 and 7 times stronger than the background noise. The method is benchmarked using the GEONET GPS stations recording the Hokkaido Earthquake (2003 September 25th, Mw = 8.3).

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“…After that, two extra campaigns realized for the estimation of the long‐term reliability of the estimated GPS velocities within 2 yr. To reduce the antenna phase pattern problems and the errors on the computation of the vertical components, we used the same receivers and antennas at all campaign sites (Trimble 4000 and 5700 with choke‐ring and geodetic Zephyr antennas). The GPS data were processed by GAMIT/GLOBK software (King & Bock 1998; Herring 2000), using the all available continuous and campaign sites in the Marmara region (Ergintav et al 2009). Details about the processing method are described in Ergintav et al (2009).…”

Section: Methodsmentioning

confidence: 99%

Structural framework of onshore and offshore Avcılar, İstanbul under the influence of the North Anatolian fault

Ergintav¹,

Demirbağ²,

Ediger³

et al. 2011

Geophysical Journal International

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SUMMARY To investigate the onshore/offshore structural framework of the northern shelf of the Sea of Marmara, a multidisciplinary study was carried out including multichannel and single‐channel seismic reflection profiling, multibeam bathymetry sounding, side‐scan sonar imaging on offshore as well as land studies for S‐wave velocity estimation by passive and active array measurements and monitoring of block deformations by Global Positioning System (GPS). Based on the multidisciplinary data, possible interactions between landslides and active faulting have been reviewed and their possible relation to the North Anatolian Fault Zone (NAFZ) has been discussed. It is observed that structurally the most deformed subsurface zone offshore coincides with the most undulated landform due to landslides in the area. This observation leads to idea that the structural complexities of the area may also contribute to land sliding as much as other contributing mechanisms such as slope instability, shallow groundwater level, lithology and liquefaction. The Çatalca Fault Zone, a branch of the inactive Western Black Sea (WBS) Fault, may constitute weakness surfaces that contribute to land sliding in the deformed Miocene layers in the study area. Based on the multidisciplinary and new data sets, we show that ongoing land sliding in the study area should be related not only to common causes of landslides but also the structural framework of the area.

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Software documentation - The lifeline of computer programs

Cited by 3 publications

References 0 publications

GPS source solution of the 2004 Parkfield earthquake

GPS source solution of the 2004 Parkfield earthquake

New approach to detect seismic surface waves in 1Hz-sampled GPS time series

Structural framework of onshore and offshore Avcılar, İstanbul under the influence of the North Anatolian fault

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