Estimating Deep S‐Wave Velocity Structure Using Microtremor Array Measurements and Three‐Component Microtremor Measurements in San Francisco Bay Area

2012 ◽  
Author(s):  
Koichi Hayashi ◽  
Deborah Underwood
Keyword(s):  
San Francisco ◽  
Wave Velocity ◽  
Velocity Structure ◽  
San Francisco Bay ◽  
San Francisco Bay Area ◽  
S Wave ◽  
Bay Area ◽  
Array Measurements ◽  
Microtremor Measurements

On: “Field measurements of azimuthal anistropy: First 60 meters, San Francisco Bay area, CA, and estimation of the horizontal stresses' ratio from Vs1/Vs2” by Heloise Bloxsom Lynn (June 1991 GEOPHYSICS, p. 822–832)

Geophysics ◽  
1992 ◽  
Vol 57 (4) ◽  
pp. 653-655
Author(s):  
D. F. Winterstein
Keyword(s):  
San Francisco ◽  
San Francisco Bay ◽  
San Francisco Bay Area ◽  
Field Measurements ◽  
Azimuthal Anisotropy ◽  
S Wave ◽  
Near Surface ◽  
Inappropriate Use ◽  
Bay Area ◽  
Surface Materials

What I would like to discuss has little to do with the content of Heloise Lynn’s paper, which beautifully illustrates S‐wave birefringence in near‐surface materials. My concern is with the terminology. Inappropriate use of the term azimuthal anisotropy has become so prevalent in both oral and written presentations that someone needs to point out clearly and in detail why such usage is ill‐advised. My comments, thus, while triggered by the usage of this paper, are for an audience that includes many besides the paper’s author.

scholarly journals Three-dimensional seismic velocity structure of the San Francisco Bay area

2000 ◽  
Vol 105 (B6) ◽  
pp. 13859-13874 ◽  
Author(s):  
J. A. Hole ◽  
T. M. Brocher ◽  
S. L. Klemperer ◽  
T. Parsons ◽  
H. M. Benz ◽  
...  
Keyword(s):  
San Francisco ◽  
Velocity Structure ◽  
Seismic Velocity ◽  
San Francisco Bay ◽  
San Francisco Bay Area ◽  
Three Dimensional ◽  
Seismic Velocity Structure ◽  
Bay Area
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