Memphis, Shelby County Seismic Hazard Maps and Data Download

Definitions:
PE = probability of exceedance,
PGA = peak ground acceleration,
SA = spectral acceleration,
acceleration unit = %g

Documentation

Graphical Formats
August 2004

To view and print the PDF files from your browser, download the Adobe Acrobat Reader.
File sizes of eps = approximately 2-4 Mb each
File sizes of pdf = approximately 1-1.5 Mb each
File sizes of jpg = approximately 100 Kb each
File sizes of poster pdf = approximately 1.4 Mb each

Probabilistic Maps

Peak Acceleration (%g) with 10% Probability of Exceedance in 50 Years: eps, pdf, jpg, poster

Peak Acceleration (%g) with 2% Probability of Exceedance in 50 Years: eps, pdf, jpg, poster

0.2 sec Spectral Acceleration (%g) with 10% Probability of Exceedance in 50 Years: eps, pdf, jpg, poster

0.2 sec Spectral Acceleration (%g) with 2% Probability of Exceedance in 50 Years: eps, pdf, jpg, poster

1.0 sec Spectral Acceleration (%g) with 10% Probability of Exceedance in 50 Years: eps, pdf, jpg, poster

1.0 sec Spectral Acceleration (%g) with 2% Probability of Exceedance in 50 Years: eps, pdf, jpg, poster

Deterministic (Scenario) Maps

Peak Acceleration (%g) for a M7.7 earthquake located northwest of Memphis, on a fault coincident with the southern linear zone of modern seismicity: eps, pdf, jpg, poster

0.2 sec Spectral Acceleration for a M7.7 earthquake located northwest of Memphis, on a fault coincident with the southern linear zone of modern seismicity: eps, pdf, jpg, poster

1.0 sec Spectral Acceleration (%g) for a M7.7 earthquake located northwest of Memphis, on a fault coincident with the southern linear zone of modern seismicity: eps, pdf, jpg, poster

Peak Acceleration (%g) for a M6.2 earthquake located northwest of Memphis, on a fault at the closest end of the southern linear zone of modern seismicity: eps, pdf, jpg, poster

0.2 sec Spectral Acceleration for a M6.2 earthquake located northwest of Memphis, on a fault at the closest end of the southern linear zone of modern seismicity: eps, pdf, jpg, poster

1.0 sec Spectral Acceleration (%g) for a M6.2 earthquake located northwest of Memphis, on a fault at the closest end of the southern linear zone of modern seismicity: eps, pdf, jpg, poster

Other Maps

MMI Hazard for a M7.7 earthquake located northwest of Memphis, on a fault coincident with the southern linear zone of modern seismicity, geology included: gif

PGA Hazard for a M7.7 earthquake located northwest of Memphis, on a fault coincident with the southern linear zone of modern seismicity, geology included: gif

Memphis/Shelby County average shear-wave velocity over 30 meters: gif

Gridded Data Values August 2004
ASCII files of gridded points used to make maps - lon, lat, value (%g) 1st line in each file gives ground-motion parameter and the probability of exceedance
0.01 degree grid spacing in latitude and longitude File sizes = approximately 30 Kb each
Probabilistic Map Grids
PGA with 10% PE in 50 yrs	0.2 sec SA with 2% PE in 50 yrs
PGA with 2% PE in 50 yrs	1.0 sec SA with 10% PE in 50 yrs
0.2 sec SA with 10% PE in 50 yrs	1.0 sec SA with 2% PE in 50 yrs
Deterministic Map Grids
PGA for M7.7 scenario earthquake	PGA for M6.2 scenario earthquake
0.2 sec SA for M7.7 scenario earthquake	0.2 sec SA for M6.2 scenario earthquake
1.0 sec SA for M7.7 scenario earthquake	1.0 sec SA for M6.2 scenario earthquake

ArcInfo Point Shapefiles August 2004
.zip format How to use these files to create a surface
0.01 degree grid spacing in latitude and longitude File sizes = approximately 130 Kb each
Probabilistic Point Grids
PGA with 10% PE in 50 yrs	0.2 sec SA with 2% PE in 50 yrs
PGA with 2% PE in 50 yrs	1.0 sec SA with 10% PE in 50 yrs
0.2 sec SA with 10% PE in 50 yrs	1.0 sec SA with 2% PE in 50 yrs
Deterministic Point Grids
PGA for M7.7 scenario earthquake	PGA for M6.2 scenario earthquake
0.2 sec SA for M7.7 scenario earthquake	0.2 sec SA for M6.2 scenario earthquake
1.0 sec SA for M7.7 scenario earthquake	1.0 sec SA for M6.2 scenario earthquake