GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 2.1 GNGTS 2023 Some considerations on the correlation between the East Pacific earthquakes and the NOAA electron bursts, looking at the AE index C. Fidani 1,2 , A. De Santis 1 , L. Perrone 1 , M. Piersanti 3 , S. D’Arcangelo 4 , M. Orlando 1 , G. Cianchini 1 , S.A. Campuzano 4 , D. Sabbagh 1 1 Istituto Nazionale di Geofisica e Vulcanologia, Roma, Italy 2 Central Italy Electromagnetic Network, Fermo, Italy 3 Università Degli Studi Dell’aquila, L’Aquila, Italy 4 Dept. of Physics of the Earth and Astrophysics, Faculty of Physics, Madrid, Spain A new correlation between strong earthquakes (EQs) and high-energy electron bursts (EBs) has been recently presented (Fidani, 2022). The peak of correlation appeared when considering shallow EQs with hypocentre depth lower than 200 km, located in a large portion of the Earth’s crust in the Eastern Pacific, with a minimum magnitude of 6. It evidenced that the 30-100 keV electron detections by the NOAA-15 satellite anticipate the EQ events around 56.5 h (see Figure 1). The Correlation Event (CE) histogram in Figure 1 was created to maximize the correlation peak, which was obtained by choosing the bins shifted by +0.3 h from 0. It caused correlation values at larger shifts to be lower than all other values. In fact, at these shifts, only a fraction of the 4 h bin is included, so containing less CE.This result to be used for EQ forecasting also required an unambiguous definition of EBs to verify a precursor phenomenology (Wyss, 1997), which was obtained considering EBs with L-shell in a restricted interval as shown in past works (Fidani, 2021; Fidani et al., 2022).