Statistical Seismic Analysis by b-Value and Occurrence Time of the Latest Earthquakes in Italy

Giuseppe Lacidogna, Oscar Borla, Valentina De Marchi

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Resumen

The study reported in this paper concerns the temporal variation in the b-value of the Gutenberg–Richter frequency–magnitude law, applied to the earthquakes that struck Italy from 2009 to 2016 in the geographical areas of L’Aquila, the Emilia Region, and Amatrice–Norcia. Generally, the b-value varies from one region to another dependent on earthquake incidences. Higher values of this parameter are correlated to the occurrence of low-magnitude events spread over a wide geographical area. Conversely, a lower b-value may lead to the prediction of a major earthquake localized along a fault. In addition, it is observed that each seismic event has a different “occurrence time”, which is a key point in the statistical study of earthquakes. In particular, its results are absolutely different for each specific event, and may vary from years to months or even just a few hours. Hence, both short- and long-term precursor phenomena have to be examined. Accordingly, the b-value analysis has to be performed by choosing the best time windows to study the foreshock and aftershock activities.

Idioma originalInglés
Número de artículo5236
Número de páginas20
PublicaciónRemote Sensing
Volumen15
N.º21
DOI
EstadoPublicada - nov 2023
Publicado de forma externa

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