CORRELATION OF THE AEROSOL LIDAR SIGNAL, LASER STRAINMETER SIGNAL AND ROCK TEMPERATURE IN BAKSAN NEUTRINO OBSERVATORY DURING EARTHQUAKES IN TURKEY ON FEBRUARY 6, 2023

We report for the first time the observation of an asymmetrical behavior of the laser strainmeter signals in Baksan Neutrino Observatory (BNO, located in the Elbrus region) during two earthquakes of similar magnitude in Turkey on February 6, 2023. We have revealed a correlation between the signals of laser strainmeter, rock basement temperature in the dead-ended BNO tunnel, and the aerosol lidar signal during the second M_w 7.7 earthquake at 10:24 UTC, Feb 6, 2023. The estimated crustal stress area radius is ~2000 km which is larger than the distance between the earthquake epicenter and BNO (~900 km), thus the signals of the strainmeter, thermometer and lidar can reflect stress-deformed state variations.