This page explains how to use OpenSHA to reproduce the figures in the paper:

Hazard Map Calculations Using GRID Computing

By Edward H. Field, Vipin Gupta, Nitin Gupta, Philip Maechling, and Thomas H Jordan

Seismological Research Letters, In Press

Download pre-print PDF (HazMapGridPaper_V13.pdf)

Generating a hazard map involves first computing a hazard-map dataset, which is a hazard curve at each point on a grid of latitudes and longitudes, and then plotting a point on the curves in map view.

We do not describe how to make the hazard-map datasets here because the application is not publicly available at this time. The reason is it uses the Condor GRID at USC, where the calculations are distributed among idle workstations across the university, and this very powerful capability must be password protected until we reach agreement with the university on access privileges. For now, we will consider access requests on a case by case basis.

What we do describe is how to plot the results of a hazard-map calculation.

FIGURE 1 This is simply a screen shot of our application for calculating hazard-map datasets.

FIGURE 2 (a):

Download the application at:

Note to Mac/Safari users: you must right-click the Jar-file link below (or hold down the option key if your mouse only has one button), otherwise the Jar-file contents will be shown in a browser window (not a pretty site)

http://www.opensha.org/applications/PlotHazardDataSetCurves.jar

Now launch the application by double clicking (on Mac or Windows) or by launching from the command line as follows:

java -jar PlotHazardDataSetCurves.jar

Read the section “How to Run Java Applications” if you have problems.

Under "Choose DataSet", select "frankel02_orig".

Set the latitude and longitude to 34.1 and -118.2, respectively.

Click "Add Plot"

Under "Choose DataSet", select "frankel02_OpenSHA_test", and click "Add Plot"

Click "Plot Prefs" at the bottom of the application. In the popup window choose "+ Symbols" for DATASET #2 and click "Done".

Click the "X log" and Y log" check-boxes at the bottom of the application.

Click the "Set Axis" button at the bottom of the application, and in the window that pops up select "Custom Scale" and set the X- and Y-axis ranges as 0.01 to 3.0 and 1e-5 to 2, respectively. Then click "OK".

Drag the boundary below the plot so the figure has the correct aspect ratio.

You have now reproduced the figure.

You should be able to save an image of the plot by right-clicking inside the plot window.

FIGURE 2 (b):

Download and launch the application at:

http://www.opensha.org/applications/PlotHazardDataSetMaps.jar

From "Choose Data Set", select "frankel02_orig".

The default values in the "Choose Region" section of the application should be fine.

In the "Set What To Plot" area, choose "IML@Prob" and set the "Probability" value just below to 0.5 (these choices might already be set by default).

In the "Map Attributes" area, set "Color Scale Limits" as "Manually", and then set "Color Scale Min" as 0.12 and "Color Scale Max" as 0.32. Also un-check the "Plot Log" option.

Click "Make Map" and in about 10 seconds you should see the image on the left side of Figure 2b.

Now from "Choose Data Set" select "frankel02_OpenSHA_test", and again click "Make Map".

You should now see the image on the right side of Figure 2b (which is basically identical to the one on the left).

Note that the second image might have popped up directly over the first (so you need to move the former to see the latter).

FIGURE 3:

Assuming you have just gone through the steps for FIGURE 2 (b), change "Color Scale Min" and "Color Scale Max" to 0.1 and 0.5, respectively.

Now, select each of the following from the "Choose Data Set" list and click "Make Map" after each selction:

SRL3_AS_PGA_ROCK
SRL3_AS_PGA
SRL3_BJF_PGA_ROCK
SRL3_BJF_PGA
SRL3_CB_PGA_ROCK
SRL3_CB_PGA
SRL3_Sa_PGA_ROCK
SRL3_Sa_PGA
SRL3_F_PGA_ROCK
SRL3_F_PGA
SRL3_SM_PGA_ROCK
SRL3_SM_PGA

You have just created all the images used in Figure 3.

FIGURE 4:

Assuming you have just gone through the steps for FIGURE 2 (b) or FIGURE 3 above, change "Color Scale Min" and "Color Scale Max" to 0.05 and 0.65, respectively.

Now, select each of the following from the "Choose Data Set" list and click "Make Map" after each selction:

SRL3_AS_1SA_ROCK
SRL3_AS_1SA
SRL3_BJF_1SA_ROCK
SRL3_BJF_1SA
SRL3_CB_1SA_ROCK
SRL3_CB_1SA
SRL3_Sa_1SA_ROCK
SRL3_Sa_1SA
SRL3_F_1SA_ROCK
SRL3_F_1SA
SRL3_SM_1SA_ROCK
SRL3_SM_1SA

You have just created all the images used in Figure 4.

FIGURE 5:

These images were created "by hand" (not using an OpenSHA application).