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For using a selected catalog for SSH, the User shall click on the "Actions" tab and then select consecutively, "USE IN SERVICEAPPLICATION" and "Source size distribution function", as highlighted in Figure 1.
Figure 1.
Once the service application has been selected the User is requested to fulfill some fields with parameter values needed for the SSH analysis (Figure 2). These parameters are:
Using seismic catalog: A catalog has been already uploaded since the previous step, however, the User has the chance to select a different dataset, either from another episode or the any dataset after performing some processing/ filtering (see "AH Episode" and "Low Level ServicesData Handling Applications" chapters).
Select Magnitude column: The user may click on the small arrow in the respective tab in order to chose among different magnitude scales, in the cases where they are available (e.g. ML, Mw, etc).
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Mmin: The User now is requested to chose the minimum magnitude (completeness level of the catalog). This can be done in two ways. The first is to type a single magnitude value in the empty box, possibly after he/she has performed an individual analysis (see MCE serviceApplication). The second is to graphically select the minimum magnitude from the Normal or the Cumulative histograms, which are available after clicking on the respective tabs. In both cases there is option to alter the step of the histogram's bars and to select between linear and logarithmic scale of the Y-axis for the plotting.
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Once all the parameters have been selected, the User may click on the "Run" button (blue button, Figure 2), for the calculation process to be initiated.
Figure 2.
The results of the process include a report with parameters values selected by the user and estimated by the system and two figures, one plotting the PDF (Probability Density Function) of the distribution as a function of magnitude and another one plotting the CDF (Cumulative Distribution Function) of the distribution as a function of magnitude (Figure 3 and Figure 4):
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The necessary parameters for SSH analysis are now estimated ("ssh_params.mat" in Figure 5) and they are ready to be used in Hazard parameters estimation. This can be achieved by clicking on the "Actions" tab and then selecting "USE IN APPLICATIONS" field. Three such parameters are available in the IS-EPOS platform: Exceedance Probability, Maximum Credible Magnitude and Mean Return Period (top right corner of Figure 5).
Figure 5.
- Exceedance Probability: In addition to the Magnitude Distribution parameters already imported, the User is requested to select the following parameters (Figure 6):
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