000019842 001__ 19842
000019842 005__ 20170118182339.0
000019842 04107 $$aeng
000019842 046__ $$k2017-01-09
000019842 100__ $$aSaez, Miguel
000019842 24500 $$aAmbient Seismic Noise Tomography of the Central Santiago Basin: Preliminary Results

000019842 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019842 260__ $$b
000019842 506__ $$arestricted
000019842 520__ $$2eng$$aEvaluation of the seismic site response of the Santiago Basin requires a detailed shear wave velocity model that accounts for vertical variations in relatively short distances. A temporal broadband station network was deployed in the center of the Basin and continuously recorded months of seismic ambient noise. The vertical components of the records were used to calculate empirical Green’s functions from noise cross-correlation. Frequency-domain cross-correlations were calculated based on Aki's (1957) formulation. Identification of zero-crossings in the real part of the cross spectrum, the cross-correlation function in the frequency domain, were associated with the Bessel function's zeros to obtain phase-velocity dispersion curves. Phase velocity maps for periods ranging from 1 to 3 s were constructed with phase dispersion curves using a regularized weighted least squares tomographic method. For this purpose, the study area was divided into a geographical grid with size 2x2 km. We concluded that the obtained velocity maps show that the south of the basin has larger velocities compared to the north zone, which is consistent with previous studies. The results are also consistent with the main geological boundaries of the basin (San Cristobal Hill, the Chena Hill, and the western flank of the Andes) and available large-scale velocity models.

000019842 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019842 653__ $$aTomography, ambient noise cross-correlation, shear wave velocity, seismic characterization, dispersion curve.

000019842 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019842 720__ $$aSaez, Miguel$$iPasten, Cesar$$iRuiz, Sergio$$iLeyton, Felipe$$iOrtega, Francisco$$iSalomon, Jose
000019842 8560_ $$ffischerc@itam.cas.cz
000019842 8564_ $$s1357450$$uhttps://invenio.itam.cas.cz/record/19842/files/4525.pdf$$yOriginal version of the author's contribution as presented on USB, paper 4525.
000019842 962__ $$r16048
000019842 980__ $$aPAPER