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1. Using Seed Waveform. The User selects a Seed file from the Episode database, or after applying the ‘Signal Download Tool’ (Figure 2, see “Low Level Services” chapter).
2. Using Seismic Event. The User select a seismic event which has been downloaded after applying the ‘Signal Download Tool’ (Figure 2, see “Low Level Services” chapter).
3. Using Ray Tracing Angles. Ray tracing angles table uploaded from the selected Episode database (see "AH Episodes" chapter).

Figure 1.

Figure 2.

The FOCI application can be selected from the seed file as shown in Figure 2b:

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Figure 2b.

Once all these files are selected, a map appears on the screen showing the epicenter of the selected event (red circle) and the locations of the seismic stations comprising the regional network (green triangles), as demonstrated in figure 3. Information on the event and the stations appears on the screen, after clicking on the circle or the triangles, respectively. Moreover, the waveforms are also shown in the screen and are available for elaboration (see also Waveform viewer guide" in "Visualization" chapter). As depicted in Figure 3, only the vertical channels are shown by default, since the methodology applied in this service uses only P-waves. Nevertheless, the User can make all the channels appear on the window, by ticking the "E" and "N" components, next to the "Show channels" field, just below the map in Figure 3. 

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