Interim map showing shear-wave-velocity characteristics of engineering geologic units in the Salt Lake City, Utah, Metropolitan area

2003 ◽  
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Metropolitan Area ◽  
Shear Wave Velocity ◽  
Salt Lake ◽  
Salt Lake City ◽  
Lake City

Shear wave velocity model of the ABANICO formation underlying The santiago City Metropolitan Area, chile, using ambient seismic noise tomography

2020 ◽  
Author(s):  
J Salomón ◽  
C Pastén ◽  
S Ruiz ◽  
F Leyton ◽  
M Sáez ◽  
...  
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Metropolitan Area ◽  
Shear Wave Velocity ◽  
Seismic Noise ◽  
Velocity Model ◽  
Dispersion Curves ◽  
Ambient Seismic Noise ◽  
Travel Times ◽  
Abanico Formation

Summary The seismic response of the Santiago City, the capital of Chile with more than 5.5 million inhabitants, is controlled by the properties of the shallower quaternary deposits and the impedance contrast with the underlying Abanico formation, among other factors. In this study, we process continuous records of ambient seismic noise to perform an ambient seismic noise tomography with the aim of defining the shallower structure of the Abanico formation underneath the densely populated metropolitan area of Santiago, Chile. The seismic signals were recorded by a network consisting of 29 broadband seismological stations and 12 accelerograph stations, located in a 35 × 35 km2 quadrant. We used the average coherency of the vertical components to calculate dispersion curves from 0.1 to 5 Hz and Bootstrap resampling to estimate the variance of the travel times. The reliable frequency band of the dispersion curves was defined by an empirical method based on sign normalization of the coherency real part. The ambient noise tomography was solved on a domain discretized into 256 2 × 2 km2 cells. Using a regularized weighted least squares inversion, we inverted the observed travel-times between stations, assuming straight ray paths, in order to obtain 2D phase velocity maps from 0.2 Hz to 1.1 Hz, linearly spaced every 0.05 Hz, in 157 of the 256 square cells of the domain. In each square cell with information, dispersion curves were assembled and used to invert shear wave velocity profiles, which were interpolated using the ordinary Kriging method to obtain a 3D shear wave velocity model valid from 0.6 to 5 km depth. The 3D velocity model shows that the Abanico formation is stiffer in the south of the study area with larger velocity anomalies towards the shallower part of the model. The value of the shear wave velocity narrows with depth, reaching an average value of 3.5 km/s from 3 to 5 km depth.

Characterization of the shear wave velocity in the metropolitan area of Málaga (S Spain) using the H/V technique

2017 ◽  
Vol 92 ◽  
pp. 433-442 ◽  
Author(s):  
S. Rosa-Cintas ◽  
D. Clavero ◽  
J. Delgado ◽  
C. López-Casado ◽  
J.J. Galiana-Merino ◽  
...  
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Metropolitan Area ◽  
Shear Wave Velocity

Shear wave velocity estimation in the metropolitan area of Málaga (S Spain)

2014 ◽  
Vol 109 ◽  
pp. 175-185 ◽  
Author(s):  
D. Clavero ◽  
S. Rosa-Cintas ◽  
C. López-Casado ◽  
J. Delgado ◽  
J.J. Galiana-Merino
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Metropolitan Area ◽  
Shear Wave Velocity ◽  
Velocity Estimation

“Can you take me higher?”: Normative thresholds for air quality in the Salt Lake City Metropolitan area

2019 ◽  
Vol 50 (2) ◽  
pp. 157-180
Author(s):  
Chris A. B. Zajchowski ◽  
Matthew T. J. Brownlee ◽  
Michael Blacketer ◽  
Jeff Rose ◽  
Danya L. Rumore ◽  
...  
Keyword(s):  
Air Quality ◽  
Metropolitan Area ◽  
Salt Lake ◽  
Salt Lake City ◽  
Lake City

Do air quality alerts reduce traffic? An analysis of traffic data from the Salt Lake City metropolitan area, Utah, USA

2013 ◽  
Vol 30 ◽  
pp. 173-185 ◽  
Author(s):  
Calvin P. Tribby ◽  
Harvey J. Miller ◽  
Ying Song ◽  
Ken R. Smith
Keyword(s):  
Air Quality ◽  
Metropolitan Area ◽  
Salt Lake ◽  
Salt Lake City ◽  
Traffic Data ◽  
Lake City
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