Seismic Activity with Front Advance user guide:

Step by step

Some visualizations connected with the Applications are described in this section. There are some special visualizations for mining-induced seismicity. They can be accessed from the 'Mining Front Advance' file (Figure 1), uploaded to the workspace from the AH-Episode database.The User may click on 'Actions' tab, then on 'USE IN VISUALIZATION' tab, and then select among the two visualizations shown in the right red panel of Figure 1 (for additional visualization - 'Integrated episode data visualization', see "AH-EPISODES Chapter").

Figure 1. Selection of visualization option for the selected data

Seismic Activity with Front Advance: This is an application dedicated to mining induced Episodes and is directly connected with the 'Time Dependent Seismic Hazard' Application. Figure 1b shows the input that is necessary to perform this visualization:
1. Input files are 'Mining Front Advance' and the corresponding seismic catalog, imported from the AH-Episode database.
2. Chose line date: The User selects the date that the front is in a certain position, either by selecting a date from the available list, or by clicking on a certain line in the 'Front Advance Plot' (right part of Figure 1b.)
3. 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).
4. 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 application 'Completeness Magnitude Estimation' - CME application). 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. The magnitude range is also shown in the screen.  
5. Margin along front strike: The distance (margin) along the front strike is requested in this field. This distance is equal for both directions of the front strike. Events will be spatially constrained by this margin together with the 'Distance along the front advance' (see field below).
6. Distance along the front advance: The distance along the front advance is requested in this field. This distance is equal for both sides of the front (i.e. in front of and behind the front). Events will be spatially constrained by this margin together with the 'Margin along the front strike' (see field above).
Once all the parameters are set, the User may click on the 'RUN' button (green button, at the bottom of figure 1b), to initiate the visualization process

Figure 1b. Input parameters and files for the visualization application

The result is a map similar to the one demonstrated in Figure 1c.

Figure 1c. Output plot

Four vectors with output results, corresponding to data extracted are also produced and they are the front position, the latitudes, longitudes and magnitudes of the events. These vectors are available for further processing and can be used as input for other applications. By clicking on any of them in the list, the values of the vector appear on the screen.

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