Multi-parameter precursory patterns associated with the earthquake sequence in Turkey on February 6th, 2023

0572935 - ÚGN 2024 RIV JP eng A - Abstrakt
Ouzounov, D. - Kalenda, P. - Pulinets, S. - Shen, X. - Yan, R. - Rušajová, Jana
Multi-parameter precursory patterns associated with the earthquake sequence in Turkey on February 6th, 2023.
Book of Abstract - International workshop on Earthquake Preparation Process – Observation, Validation, Modeling, Forecasting. Chiba: Chiba University, 2023. s. 21-21.
[International Workshop on Earthquake Preparation Process – Observation, Validation, Modeling, Forecasting /7./. 24.05.2023-25.05.2023, Chiba]
Institucionální podpora: RVO:68145535
Klíčová slova: precusors * earthquake * litosphere * ionosphere
Obor OECD: Volcanology
http://www.earth.s.chiba-u.ac.jp/webuser/hattori/iwep7/IWEP7-2023-program_and_abstracts-0520.pdf

The most recent M7.8 earthquake on Feb 6, 2023, struck Turkey/Syria at 03:17 LT, and with a more than 100 km rupture, that was one of the deadliest this decade. A second M7.5 earthquake hit the region nine hours later. We study critical lithosphere/atmosphere /ionosphere coupling processes, the modified Earth’s EM environment, and precede the earthquake events. We combined observations from different non -correlated ground and space monitoring systems for the first time, such as 1. Vertical static pendulums data from the European network of tiltmeters – vertical static pendulums (Kalenda et al. 2012), /2/ Outgoing long-wavelength radiation (OLR) obtained from NPOESS, 3/ Ionospheric plasma observations from the China/ Italy Seismo-Electromagnetic Satellite (CSES1), and 4/ Atmospheric chemical potential (ACP) obtained from NASA assimilation models. The deformation anomalies started at all European pendulum instruments on January 23, 2023(14 days ahead). The most significant anomaly was recorded in cave No.13, Moravian Karst. This pendulum is directly on the N-S-oriented fault corresponding to the East Anatolian Fault activation (NE-SW), which was in action. NOAA satellite thermal observations of the epicentral show an increase in infrared radiation starting in December 2022 and riches the maximum on January 13 and Feb 1, 2023(24 and 5 days ahead), near the epicenter of the M7.8, compared with the 15 years background level. Increases in OLR from the satellite data coincided with an intensification in the atmospheric chemical potential (Feb 1-4), measured near the epicentral area. The electron density and oxygen ion density from the Ionosphere plasma instrument of the CSES1 satellite showed an abnormal increase on January 27-28 (9 days before the earthquake), which is highly correlated with the earthquake occurrence given the stable space weather index during this period. We show that by combining ground and near-space data accordingly to the physical concept of the Lithosphere-Atmosphere-Ionosphere Coupling (LAIC), we could identify, on a regional basis, abnormal patterns of pre-earthquake-related features.
Trvalý link: https://hdl.handle.net/11104/0343460