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A compilation of potential sources for earthquakes larger than M 5.5 in Italy and surrounding areas


Individual Seismogenic Sources

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.
Individual Seismogenic Sources (ISS) 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 between length, width, single event displacement and earthquake magnitude. When available, they can also be augmented by fault scarp or fold axis data (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 cannot guarantee their completeness. Individual Seismogenic Sources can hence be used to calculate earthquake and tsunami scenarios and investigate tectonic and geodynamic processes but are not meant to comprise a complete input dataset for probabilistic hazard analysis.

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).
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