Shallow velocity database for Las Vegas basin

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Contact Dr. Barbara Luke

Shallow Seismic Wave Velocity Database for Las Vegas Basin
Last updated 06/12/07 by H. Murvosh, B. Luke and E. Gonzalez

This compilation is a result of the Las Vegas Seismic Response Project sponsored by the Lawrence Livermore National Laboratory (www.llnl.gov) and the Earthquakes in Southern Nevada Project (http://earthquakes.unlv.edu) sponsored by the US Department of Energy. These shear- (Vs) and compression- (Vp) wave velocity measurements were compiled by the Engineering Geophysics Laboratory (EGL) at the University of Nevada, Las Vegas (www.ce.unlv.edu/egl). The data sources include measurements made by the EGL and its research partners, data collected by others and given to us to post, and records filed with the Clark County Building Department (http://www.co.clark.nv.us). For the velocity measurements made by others that are not otherwise publicly available, permission was granted for their use in research. The EGL does not ensure the accuracy or quality of datasets reported by others.

Data are grouped on the website as follows: each dataset that was collected by the EGL or provided to us in detail has a bold header which denotes the site’s name. Some locations encompass many measurements, using different techniques. Data acquired from the Clark County Building Department are listed together under “CC Public Records.”

Velocity profiles from surface wave measurements (SASW, MASW, ReMi) are provided as step functions. Crosshole and downhole data are provided as point measurements. For the Clark County data, layering was interpreted manually by EGL researchers from digitized plots submitted to the County with the geotechnical reports. The 30-meter, depth-averaged shear-wave velocity (VS30) values for these files are taken directly from the reports.

File format:

All file names have 6 characters plus extension “.txt”:
Characters 1-3: Site identification, assigned by EGL
4: Type of measurement: S - SASW; D - Downhole; C - Crosshole; R - ReMi
5: Type of energy: S - Shear; P - Compression
6: Measurement number (to distinguish multiple measurements at a site)

Each file has eleven header lines. The first line contains the full name of the site. The header also contains location (lat/long), cross streets, type of measurement, and more. If some of this information is not available for a site, the detail is left blank.

The last header line in each file introduces the depth-versus-velocity data columns. The data are in tab-delimited format. The first column is depth and the second is velocity. All data are presented in SI units (meters, meters per second).

The entire data set can be downloaded in a zip file by clicking on “Click to download all Vs here.”

If you have data to contribute, or if you have any comments or questions, please contact Dr. Barbara Luke at barbara.luke@unlv.edu or (702) 895-1568.

-----------------------
Sample: CSNRS1.txt

Site name: Community College of Southern Nevada- Cheyenne Campus
Cross streets: 
Lat/long: 36.22/-115.11
Date: August 20, 2002
Performed by: UNR-T.Rasmussen (with J. O'Donnell)
Type of measurements: ReMi
Depth of measurements: 130.8 m
Function stepped (y or n): y 
Posted by: Ying Liu 10/3/2003
Vs30 (m/s): 
Depth (m) Vs(m/s)
0	532
14.955	532
14.955	308
30.804	308
30.804	971
130.8	971
Download entire Vs archive.
BRC
BRCSS1
BRC_preferred
CAL
CALSS1
CAL_preferred
CSN
CSNRS1
CSN_preferred
EGT
EGT_preferred
EGTCP1
EGTCP2
EGTCS1
EGTCS2
EGTDP1
EGTDS1
EGTRS1
EGTRS2
EGTSS1
I15
I15DP1
I15DP2
I15DP3
I15_preferred
I15DS2
I15DS3

LVS
LVSCS1
LVSRS1
LVSSS1
LVSSS2
LVSSS3
LVSSS4
LVSSS5
LVSSS6
LVS_preferred

RAI
RAIDP1
RAIDS1
SDS
SDSDP1
SDSDS1
SGS
SGS_preferred
SGSRS1
SGSSS1
SGSSS2
WLV
WLVSS1
WLV_preferred
ANN
ANNSS1
DOE
DOESS1
EFL
EFLSS1
GRP
GRPSS1
MNL
MNLSS1
NGC
NGCSS1
TRD
TRDSS1
WHT
WHTSS1
Las Vegas Transect
Transect

CC Public Record

050RS1
051RS1
055RS1
064RS1
064RS2
080RS1
084RS1
141RS1
142RS1
151RS1
152RS1
211RS1
211RS2
213RS1
213RS2
213RS3
221RS1
221RS2
221RS3
221RS4
222RS1
241RS1
251RS1
251RS2
251RS3
252RS1
253RS1


CC Public Record

253RS2
261RS1
261RS2
261RS3
261RS4
261RS5
261RS6
261RS7
261RS8
282RS1
291RS1
311RS1
312RS1
312RS2
312RS3
312RS4
312RS5
312RS6
331RS1
341RS1
342RS1
342RS2
342RS3
351RS1
352RS1
A13RS1
A40RS1

CC Public Record

A40RS2
A40RS3
A40RS4
B38RS1
B38RS2
B38RS3
B38RS4
C10RS1
C10RS2
C10RS3
C11RS1
C24RS1
C24RS2
C24RS3
C28RS1
C46RS1
C49RS1
C52RS1
C54RS1
C56RS1
C58RS1
C95RS1
D1IRS1
D2GRS1
D3FRS1
D10RS1
D10RS2

CC Public Record

D11RS1
D12RS1
D13RS1
D13RS2
D17RS1
D18RS1
D18RS2
D18RS3
D18RS4
D18RS5
D18RS6
D18RS7
D18RS8
D22RS1
D23RS1
D24RS1
D24RS2
D25RS1
D26RS1
D27RS1
D28RS1
D31RS1
D32RS1
D32RS2
D35RS1
D37RS1
D38RS1

CC Public Record

D39RS1
D43RS1
D43RS2
D43RS3
D44RS1
D45RS1
D49RS1
D50RS1
D89RS1
E48RS1
P16RS1
P81RS1
0P3RS1
0P3RS2
0P3RS3
0P4RS1
0P4RS2
0P6RS1
0P6RS2
0P6RS3
0P7RS1
023RS1
034RS1
038RS1
048RS1