Tsallis Entropy and Mutability to Characterize Seismic Sequences: The Case of 2007–2014 Northern Chile Earthquakes
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Pasten, Denisse; Vogel, Eugenio; Saravia, Gonzalo; Posadas Chinchilla, Antonio Miguel; Sotolongo, OscarFecha
2023-10-05Resumen
Seismic data have improved in quality and quantity over the past few decades, enabling
better statistical analysis. Statistical physics has proposed new ways to deal with these data to
focus the attention on specific matters. The present paper combines these two progressions to find
indicators that can help in the definition of areas where seismic risk is developing. Our data comes
from the IPOC catalog for 2007 to 2014. It covers the intense seismic activity near Iquique in Northern
Chile during March/April 2014. Centered in these hypocenters we concentrate on the rectangle
Lat18
22 and Lon72
68 and deepness between 5 and 70 km, where the major earthquakes originate.
The analysis was performed using two complementary techniques: Tsallis entropy and mutability
(dynamical entropy). Two possible forecasting indicators emerge: (1) Tsallis entropy (mutability)
increases (decreases) broadly about two years before the main MW8.1 earthquake. (2) Tsallis entropy
(mutability...
Palabra/s clave
Tsallis entropy
information theory
subduction seismicity