Example of estimating stationary seismic hazard (SSH) parameters from a catalog
The scenario described in the next section covers a process of estimating stationary seismic hazard (SSH) parameters based on a seismic catalog connected to one of the Platform's episodes - Song Tranh. Follow the subsequent steps to perform the analysis by yourself.
As the scenario includes storing data in your personal workspace, running analysis on it and storing results, you have to have an account within the EPISODES Platform and be able to log in. If you don't have the account yet, please register, following the Registration guide.
Step 1: Episode selection
Access the episode list (see also AH Episodes guide) and select one of the episodes on it. In our example we will be using the episode SONG TRANH: deep water reservoir (marked in the red in the figure below)
Step 2: Seismic catalog of the episode
Performing Step 1 will take you to the view of the chosen episode, where, among other episode properties, you will be able to check the data contained in the episode, among others the seismic catalog (marked in red in the figure below). For a detailed description of the features displayed within the episode view, please consult the AH Episodes guide.
Note, that when accessing any data type chosen from the episode view, you will be either presented with the related data item, if the episode contains just one file of that type (like in the example above), or you will be able to choose from multiple items of the same type, if the episode contains more.
Step3: Adding the catalog to workspaceOnce you see the catalog, you can browse through it and check its data. If you find it suitable for further analysis, use the Actions button and choose the Add to workspace item (marked in red in the figure below). Next, you have to choose a place in workspace where you want to add the catalog and confirm. When this is done, the data is copied to your personal workspace and can be further processed.
Step 4: Using the catalog for analysisOnce the selected data is copied to the workspace (a file has appeared in the workspace tree), you can start the processing by using the action Use in application... either from the workspace item menu next to the file within the workspace tree or the Actions menu (both marked in the figure below). In our example we will use the Source size distribution functions/ Stationary Hazard from the second menu that appears. See also the My Workspace guide for more information on using the workspace.
Step 5: Filling application formSelecting the Source size distribution functions/ Stationary Hazard in the previous step, caused this application to be added to your workspace after the catalog file. It will automatically show on your screen, and will require you to fill the form fields specific to the SSH analysis (some of them will be already populated with default values). These parameters can be selected either from a list of values (e.g. 'Chosen magnitude column') or just typed by the user (e.g. 'Start', 'End' and 'Step of Magnitude'. Note that 'Mmin' parameter can either be typed or chosen from the histograms after clicking on 'Histogram' or 'Cumulative Histogram' tabs. 'Change Input' can be selected for using a different dataset under the precondition that it is already uploaded in the workspace. Once all the parameters have been selected, the user may click on the 'RUN' button (green button at the bottom of the figure), for the calculation process to be initiated. The 'SAVE' button can be also used for saving the application form (Field 1). Autorun option can be selected as well (Field 2):
Step 6: Running the application
The process soon terminates and the status changes to 'Finished'. The results of the process include a report with parameters values previously selected by the user and then estimated by the system (blue panel in the figure) and two charts plotting the PDF and CDF of the magnitude distribution, respectively, as functions of magnitude. The figures may be printed or downloaded by clicking on the icons indicated in the red frame of the figure. Options for figure handling are available below the charts.
Step 7: Using the application output for next analysis
The output of the Application contains files in matlab format (.mat files shown in the blue frame of the Figure below). These files can be further used in a variety of actions including downloading, copying and use in other applications e.g. for estimating the Mean Return Period (red frames in the Figure below).