[M-IS08] Interdisciplinary studies on pre-earthquake processes

[MIS08-04] A system of the Monitoring Vibrations and Propagations in the Lithosphere, Atmosphere, and Ionosphere

*Chieh-Hung Chen¹, Yang-Yi Sun¹, Kai Lin¹, Huaizhong Yu² (1.Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan, Hubei, China, 2.China Earthquake Networks Center, Beijing, China)

Keywords:LAI coupling, Pre-earthquake anomalous phenomena

Scientists have reported that pre-earthquake anomalous phenomena can be observed in numerous distinct fields. These anomalous phenomena were classified into different groups based on promising relationships from potential mechanisms. However, the promising relationships among distinct parameters in a group are sometimes questionable due to that a certain distance exists between adjacent stations. A novel system was established in Leshan, Sichuan, China to monitor changes and/or waves propagations from the lithosphere to the ionosphere in 2021. The system monitors changes of more than 10 physical parameters at altitudes ranged from -5 meters to ~350 kilometers. A piezometer monitors changes of groundwater levels with a sampling interval of 2 seconds in a well. Variations of temperature and air pressure are continuously observed by utilizing thermometers and barometers in wells with depths of 5, 3 and 1 meters and 0.5 meters above the surface. Two broadband seismometers were set at opposite corners of the station to monitor ground motion with a sampling rate of 50 Hz. A ground-based GNSS receiver routinely receive signals from the BeiDou geosynchronous satellites to study ground vibrations and changes of the total electron content about 350 kilometers above the Earth’s surface. A Sonic Detection And Ranging (SODAR) system and a Radio Acoustic Sounding System (RASS) were also employed in monitoring changes of temperature and winds from the surface to ~5 kilometers in altitude. To understand the disturbance of the acoustic-gravity waves on clouds, an all-sky camera is installed in the station. Two atmospheric electric field meters are utilized to monitor electric fields around the surface. A flux magnetometer was installed in the surrounded areas with horizontal distance of about 50 meters to study changes of the geomagnetic field and ionospheric current about 100 kilometers above the surface. Furthermore, the VHF coherent scattering radar and the Meteor radar were set about 20 kilometers away from the stations for monitoring changes 80-160 kilometers above the surface. Note that observations from the China Seismo-Electromagnetic Satellite (CSES) and Radio occultation can also be integrated together to sheds light on extending the monitoring upon 500 kilometer above the surface. In short, an MVP-LAI system was established to Monitors Vibrations and Propagations in the Lithosphere, Atmosphere, and Ionosphere and to examines the accuracy of those potential mechanisms.