For earthquake risk analysis you have to determine which way you will define hazard. In Hazus there are 5 methods to define hazard.
- Historical epicenter event
- Source event
- Arbitrary event
- Probabilistic hazard
- User supplied hazard
As we are planing to run hazus for our study region outside of USA, method 1 & 2 will not work properly. Because of the wrong distance and other parameters. But if you are advanced user of Hazus, you can overcome this limitation. Best way to use method 3 or 5 for global hazus study.
If we click Hazard on Hazus as in picture, there are 3 tabs. Data Maps, Scenario and Show Current. Show Current is nothing but will your current selected method and parameters of hazard. Main is Data Maps and Scenario.
In Data Maps we have to put some data file in shape file format. These data files include
- Soil Maps
- Liquefaction Maps
- PGA Maps
- PGV Maps
- SA0.3 Maps and
- SA 1.0 Maps
3, 4, 5 & 6 are required if we want to use accurate method User supplied hazard for defining hazard.
In Arbitrary event method one have to know the fault location, fault type, fault parameters such as dip angle, orientation etc and probable magnitude of that fault.
In this method Hazus will automatically calculate Response Spectrum (Demand Curve), shaking of the ground, building (PGA- ground, SA- building), due to the earthquake originated from the arbitrary point.
Fig: Calculated ground motion parameters of demand curve generated from arbitrary point method.
If we want to use the User supplied hazard method we have to prepare demand curve parameters for different return period of earthquakes. Detail of preparation of demand curve can be found here.
