These instructions will help you compute calculations using the Unified Hazard Tool. Please also see the supplementary documentation for more detailed information on the data and services underlying this application.
Earthquake Hazard and Probability Maps
This section allows you to view all of the hazard and fault overlays on a map. Click on the layer chooser (upper right-hand of map) to view your overlay options.
Hazard Curve
To compute a hazard curve, the following inputs are required:
- Edition
- Location (Latitude/ Longitude)
- Site Class
Once you have entered all of the requisite inputs, scroll down to the “Hazard Curve” section and click the button labeled “Compute Hazard Curve” to perform the calculation.
NOTE: Calculations may take upwards of 30 seconds to complete.
Deaggregation
To compute a deaggregation, the following inputs are required:
- Edition
- Location (Latitude/ Longitude)
- Site Class
- Spectral Period
- Time Horizon
Once you have entered all of the requisite inputs, scroll down to the “Deaggregation” section and click the button labeled “Compute Deaggregation” to perform the calculation.
NOTE: Calculations may take upwards of 30 seconds to complete.
History
This section allows you to keep a history of hazard curve and deaggregation calculations for multiple sets of inputs.
Tracking Multiple Calculations
Your first calculation is automatically stored in the history section. To store a second set of calculations, click the “new” button (located on the right side of the list). A new record will be created and all of your previously selected inputs will be cleared.
NOTE: Your calculations will be identifiable based on the data that you input for each calculation.
Deleting a Calculation
If a calculation is no longer needed you can delete it. Click the “delete” link to remove the calculation, and a new calculation will be selected.
NOTE: Deleting the currently selected calculation will select a previously created calculation. However, if no previously created calculation exists then a new record is created.