The paper is devoted to analysis of hydrogeological,
geomagnetic and seismic response to the two great remote geophysical events,
2022 Tonga volcano eruption and 2020-2023 Türkiye earthquakes in Georgia
(Caucasus). The geophysical observation system in Georgia, namely, water levelstationsin the network of deep wells, atmospheric pressure and the
geomagnetic sensors of the Dusheti Geophysical Observatory (DGO) as well as
seismic data in Garni Observatory (Armenia) respond to the Tonga event by
anomalies in the time series. These data show that there are two types of
respond: infrasound disturbances in atmospheric pressure and seismic waves in
the Earth generated by the eruption. After Tonga eruption January 15 at 04:21
UTC three groups of N-shaped waveforms were registered in the water level
corresponding to the global propagation characteristics of the N-shaped
waveform of infrasound signals on the barograms generated by eruption at the
distance ~15,700 km: they were identified as the Lamb wave, a surface wave package
running in the atmosphere with a velocity around ~314 m/s. The paper also
presents the WL reactions to three strong EQs that occur in Türkiye 2020-2023,
namely Elaz？？, Van and Türkiye-Syria EQs. WL in Georgian well network reacts to
these events by anomalies of different intensity, which points to the high
sensitivity of hydrosphere to remote (several hundred km) strong EQs. The
intensity and character of WL reactions depend strongly on the local
hydrogeological properties of rocks, surrounding the well.
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