Individual Seismogenic Sources

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The Individual Seismogenic Sources are defined by geological and geophysical data and are characterized by a full set of geometric (strike, dip, length, width and depth), kinematic (rake), and seismological parameters (single event displacement, magnitude, slip rate, recurrence interval). Each parameter is then rated for accuracy.

ISS

Individual Seismogenic Sources are assumed to exhibit strictly-periodic recurrence with respect to rupture length/width, slip per event, and expected magnitude. They are compared to worldwide databases for internal consistency in terms of length, width, single event displacement and magnitude, and can be augmented by fault scarp or fold axis data when available (usually structural features with documented Late Pleistocene - Holocene activity).

This category is intended to supply the most accurate information available for the best identified sources, but the completeness of the sources themselves cannot be guaranteed. Individual Seismogenic Sources can hence be used for calculating earthquake and tsunami scenarios and for tectonic and geodynamic investigations, but are not meant to comprise a complete input dataset for probabilistic assessment of seismic hazard.

Similarly to the other categories of DISS sources, each Individual Seismogenic Source is identified by the code CCIS###, where:

CC is the two-letter ISO 3166-1 code for names of officially recognized countries;
IS identifies specifically the Individual Seismogenic Sources;
### is an ordinal between 1 and 999 (including leading zeroes).