On March 18, 2022, the journal Progress in Earthquake Research published an article "Under the surface: pressure-induced planetary fluctuations, volcanic lightning and gaseous clouds caused by submarine eruption of Hongjiatong-Hongjiaha Sect volcano provide a good research opportunity (under the surface: pressure-induced planetary scale waves, volcanic lightning and gaseous clouds caused by submarine rise of Hongjiatong-Hongjiaha Sect volcano provide an excellent research opportunity). It is pointed out that the eruption of Hongjiatong-Hongjiahapa volcano triggered a tsunami and caused several diffuse atmospheric fluctuations. At the same time, the volcanic eruption column also sprayed gas and volcanic ash into the middle atmosphere in the lower stratosphere.

By collecting the data of earthquake, volcanology, sound wave and lightning during the volcanic eruption, this study reveals in detail the volcanic eruption event of Hongjiatongjia-Hongjiaha Sect in June 65438+1October 65438+May, 2022. In the first hour of volcanic eruption, rapid tsunami wave, long-period seismic wave, huge sound wave, infrasound wave, unusually strong volcanic lightning and unstable volcanic eruption column with instantaneous eruption height up to 58 kilometers in the middle atmosphere were produced. Because high-energy seismic signals are spread all over the world, the seismic synthetic superposition record also records the accidental earthquake events in the gestation period, which has a good correlation with the infrasound pressure waveform recorded in Fiji. In the first few hours of volcanic eruption, gravitational wave signals were observed all over the world. Because these signals with large amplitude and long wavelength are influenced by the atmosphere driven by the unstable but quasi-continuous eruption of magma mixture containing mantle, melt and gas, and the time affected by the atmosphere is much longer than the rupture time of large earthquakes recorded by modern instruments, shock waves originating from the interaction between compressed air and the surrounding (wave) sea surface are generated. This shock wave is different from the tsunami wave caused by earthquake sliding, landslide or crater collapse in the traditional sense, and it is caused by the huge volume change caused by the supercritical nature of volatiles related to the hot volatile-rich volcanic eruption column. The time series of volcanic eruption column can be converted into volume flow and mass flow by calculation. After calculation, it is known that the eruption time is about 12h, and the volume and mass of volcanic eruption are estimated to be about 1.9 km3 and 2900 kot respectively. Due to the interaction between magma and seawater, accompanied by high unit mass charge and high concentration of dissolved volatiles before eruption, the generation of fine ash enhances the frequency and intensity of lightning, thus providing a quick measure for the activity and eruption amplitude of volcanic eruption column.

The researchers said that describing the complex nonlinear behavior of high-energy volcanic eruption and its accompanying phenomena is of great significance for disaster reduction, volcanic eruption prediction and timely response to future disasters.

Please indicate the source and author of this article: Journal of Dynamic Monitoring of Balloon Science, No.07, 2022, compiled by Sunny, Lanzhou Literature and Information Center of China Academy of Sciences.