1. Statistical Seismic Analysis by b -Value and Occurrence Time of the Latest Earthquakes in Italy.
- Author
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Lacidogna, Giuseppe, Borla, Oscar, and De Marchi, Valentina
- Subjects
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EARTHQUAKES , *EARTHQUAKE prediction , *STATISTICS , *EARTHQUAKE aftershocks , *EARTHQUAKE magnitude , *L'AQUILA Earthquake, Italy, 2009 - Abstract
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. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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