Affiliation:
1. Centre de Recherche en Astronomie Astrophysique et Geophysique (CRAAG) Route de l’Observatoire Bouzareah Algeria
2. ESPRIT School of Engineering and LSAMA Laboratory Faculty of Sciences of Tunis University of Tunis El‐Manar El‐Manar Tunisia
3. Astronomy Department National Research Institute of Astronomy and Geophysics (NRIAG) Egypt Egypt
4. Solar and Space Research Department National Research Institute of Astronomy and Geophysics (NRIAG) Egypt Egypt
Abstract
AbstractThis paper investigates the impact of a powerful gamma ray burst (GRB) that occurred on 9 October 2022, on the Earth's environment using a very low frequency receiver (VLF) to probe the lower ionospheric region (the D region). In addition to the VLF data analysis, we employ numerical simulation through the Long Wavelength Propagation Capability code (LWPC) to derive the increase in the D− region electron density. Our results revealed discernible perturbations in amplitude and phase across all transmitter paths (NAA, DHO, ICV, and NSC) to the Algiers receiver persisting for 40 min. At the maximum of the signal perturbation, the LWPC simulation results showed a decrease in the mean new reference height h′ from 74 to 65.71 km, along with an increase in the sharpness factor β from 0.3 to 0.4875 km−1. Under these new conditions, the electron density increased from its ambient value (216.10 cm−3) to 33.7 103 cm−3.
Publisher
American Geophysical Union (AGU)