## 7 Summary and Conclusions  
Analysis of plasma density perturbations along the trajectories of Swarm satellites over the area of the strong Xinjiang earthquake (\(\sim\)40\({}^{\circ}\)N, 80\({}^{\circ}\)E; Mw = 7) on 22 January 2024, revealed several complementary features that are likely associated with the generation and penetration of the coseismic electric field into the ionosphere. The EQ occurred during a prolonged period of geomagnetic quietness. Several hours after the main shock, the tandem of SwC and SwA satellites crossed the EQ area for the night-side orbits and observed a small-scale anomaly in the plasma density. In the approach used in this work, we propose analyzing the difference between the observations of the two satellites rather than the absolute values of the plasma density. In this way, explicit subtraction of the reference field can be avoided. The satellite flying first measured lower values of _Ne_, while the second satellite, flying 12 s later and \(\sim\)150 km to the east, detected an increase of about \(1.5\times 10^{4}\) el/cm\({}^{3}\). The anomaly started developing over the epicenter a day before the EQ and maximized on the day of the main shock and aftershocks. We suppose that the observed irregularity is a signature of a coseismic electric field penetrating the ionosphere due to additional ionization of the air over the epicentre and increased conductivity of the air column. The observed chain of the ionospheric and tropospheric anomalies is consistent with the LAIC concept. The magnitude and shape of the observed ionospheric irregularity appear to be consistent with the predictions of the \"optimistic\" models representing the concept of lithosphere-atmosphere-ionosphere coupling in terms of electrodynamic, chemical, and thermal processes. On 22 January, the local coseismic anomaly was detected against the background of a global increase in plasma density due to solar flares and associated enhancement of the X-ray and proton fluxes, which affected the ionization rate, TEC distribution, and air conductivity. It is important to distinguish specific, relatively low-amplitude anomalies of coseismic origin from intra-ionospheric variability, even if the geomagnetic conditions are quiet. The ionospheric anomaly is in agreement with simultaneously observed disturbances of meteorological parameters in the EQ region. The MERRA-2 specific humidity, latent heat flux, and aerosol optical depth all exhibit co-located disturbances that can be attributed to the effect of increased ionization rates of tropospheric air, resulting in greater electrical conductivity in the near-Earth boundary layer. Around the day of the EQ, the emanation of radon and its subsequent decay associated with the preparation of the seismic event caused a local drop in humidity and a pronounced enhancement in latent heat flow and AOD. Thus, the large EQ that occurred on 22 January 2024 provides a comprehensive example of the complex geospheric response to seismic activity. Observations confirm the chain of elements included in the LAIC through electromagnetic processes, which, in turn, is a part of the GEC theory. The most pronounced disturbances of seismic origin occurred on the day of EQ, and some indications can be noticed a day before. Conceptualization, R.L. ; methodology, R.L. ; software, G.D.; validation, G.D. and A.S.; formal analysis, D.G and A.S.; investigation, R.L., G.D. and A.S.; writing--original draft preparation, R.L. ; writing--review and editing, R.L. ; visualization, G.D. and A.S. All authors have read and agreed to the published version of the manuscript. This research is funded by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan under the grant IRN-AP1967/977. The Swarm satellite data are available at Swarm mission's website ([[https://swarm-iss.eo.esa.int](https://swarm-iss.eo.esa.int)]([https://swarm-iss.eo.esa.int](https://swarm-iss.eo.esa.int))).