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This is a service for filtering seismic catalogs. The product is a new catalog filtered upon the User's parameters setting. The input file is a seismic catalog that can be uploaded from "Change Input" tab (shown in the yellow frame of Figure 5). Next, the User may perform various filtering according to the values of the attributes assigned in the catalog. The User may choose one of these attributes (as ID, ML, Lat etc, displayed in Figure 5) and provide the values he/she wishes, selecting among 'Select all values' (option "1"e.g ID field, Figure 5), 'Select Range' (option "2"from the calendar - Field 1, Figure 5, or by typing values range - Field 1, Figure 5) and 'Select list of values' (option "Field 3 ", Figure 5).

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Figure 5.

Alternatively, the User may apply interactively spatial filtering by clicking in the "Select events from map" tab (depicted by the red upper green box in Figure 5). This option grants to the User the possibility to select data, spatially constrained by a predefined shape (numbers 2-4 in Figure 6):

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As soon as the filtering criteria have been defined, the User shall click on the "Run" button (blue green button at the bottom of Figure 5) to apply the those criteria. The User may also select the "Preview Selection on map" tab (indicated by the green frame, at the bottom of Figure 5) in order to view an illustration of the events from the original catalog (red circles) and the events included in the filtered catalog (green circles). A new catalog (catalog.mat) has been created and it is available for any further processing. In addition the system provides all the information and services that are valid for the original catalogs (see "AH Episodes" Chapter, for details).

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