TITLE:
Lg Waves Generated by the May 24, 2025 Earthquake in Borkou Region in Chad
AUTHORS:
Adoum Issak, Doumnang Jean Claude, Mahamout Mahamat
KEYWORDS:
Earthquakes, Location, Borkou (Chad), Lg Waves
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.14 No.7,
July
29,
2026
ABSTRACT: This study follows the occurrence of an unexpected earthquake that occurred on May 24, 2025, in the Borkou region in the northern part of Chad. Chad is a stable zone in the tectonic point of view since it is located on a plate whereas earthquakes generally occur at the boundaries of plates, in subduction zones. The earthquake of May 24, 2025, with a magnitude 4.3 on the Richter scale, that occurred in this region is recorded and located at Chad station. The epicenter is located on a fracture line oriented SE-NW and passing through the South of Tibesti. The exploitation of data from the station before and after the event allowed us to conclude that it is an isolated earthquake, the kind often encountered in stable regions. The Lg waves that accompanied the earthquake were very well observed on a purely continental path and blocked on another path through the Mediterranean Sea. This is in perfect harmony with the mode of propagation of these waves which are blocked in an oceanic path.