Page History

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•  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

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Note that Displacement, Velocity or Acceleration can be selected as response unit for the waveforms (see 'Seed Response Calculation' section in Low-Level services Data Handling applications chapter)  

• Picking Phase:

The User has to pick a starting and an ending point from the Vertical component of a station (**Z channel - see Figure 5). Then, he/she has to repeat this picking for the other stations.

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• 1-D and 2-D plots - including 1-D and 2-D plots with secondary Y-axis (Figure 6): These plots give the capability of choosing between linear and logarithmic scales for X and Y axes (ticking on small boxes, Field 1, Figure 6) and selection of diverse graphic views among scatter plot, spline, column and line. Plotted parameters may be hidden and re-appear by clicking at the legend (Field 2, Figure 6). By holding the cursor still onto an option or in a figure element [e.g. bar in histograms or points in scatter plots], information on this option or element appears on the screen (Field 3, Figure 6). Many figures have enabled zooming services options for focusing in a specified range among the values. This is achieved by clicking at a point of the figure and dragging the mouse cursor either leftwards or rightwards. Instructions are shown at the bottom of the figure as well (field 7, Figure 9).Zooming can be reset by clicking on the 'Resert Zoom' tab shown in Field 4 of Figure 6. The user may save a selected figure (Field 5, Figure 6) in one or more of the following formats by clicking on the square panel: .png, .jpeg images, .pdf document or .svg vector image. Alternatively, for some figures the user can download the corresponding data and save them in .csv format in order to use it for further analysis. The figures can also be printed (also from Field 5, Figure 6).

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