Precision Differential Thermometers for Studying Thermal Processes at the Northern Caucasus Geophysical Observatory

Лиходеев, Д. В.; Гравиров, В. В.; Кислов, К. В.

doi:10.3103/s0747923918060075

Cited by 3 publications

(2 citation statements)

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“…Several different sensors were also installed inside the adit so that the LIDAR data could be compared with other parameters of the laboratory environment. One of the sensors was the precision thermometer (0.005 • C resolution) developed at the IPE Laboratory for fundamental problems of ecological geophysics and volcanology [16]. The precision thermometer was installed on the geophysical instrumental basement located 15 m from the dead end in the middle of the adit (concrete cube in figure 1(a)).…”

Section: Methodsmentioning

confidence: 99%

Volcanic activity monitoring by unique LIDAR based on a diode laser

Першин¹,

Собисевич²,

Grishin³

et al. 2020

Laser Phys. Lett.

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For the first time, we monitored the Elbrus volcano activity detecting volcanic gases emanating through pores using an unique eye-safe LIDAR system. A highly sensitive eye-safe LIDAR system was developed for monitoring the fracture-emitted aerosol, which is transported by volcanic gases inside a hot tunnel near the Elbrus Mountain. The developed LIDAR is based on a diode laser (transmitter, 910 nm, 3 ns, <1 µJ cm−2) and a single-photon avalanche photodiode (detector). From August to October 2019, within the first months of the LIDAR monitoring, we have detected a two-fold decrease in the fracture-emitted aerosol emanation, while other parameters in the tunnel remained relatively stable (radon concentration, air temperature and humidity changed less than by 1%). A significant correlation between the LIDAR signal of volcanic aerosol and the Earth’s crust deformation measured by the laser strainmeter located nearby was found. Based on our preliminary experiments we consider the new LIDAR system as a sensitive, economical and robust instrument for Earth’s crust deformation and volcanic activity monitoring and eruption precursor observation.

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Section: Methodsmentioning

confidence: 99%

Volcanic activity monitoring by unique LIDAR based on a diode laser

Першин¹,

Собисевич²,

Grishin³

et al. 2020

Laser Phys. Lett.

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“…The connection of the same processes, but with negative correlation coefficients, is more difficult to interpret. It is necessary to remember the role of solar muons and neutrinos in heating the upper magma chamber of the volcano [3]. In cloudy or rainy weather, these processes may dominate.…”

Section: Experimental Data Yellowstone Volcano Streammentioning

confidence: 99%

Super Volcano Activity (Yellowstone and Elbrus): Parameters of Sensitivity

Khavroshkin¹,

Tsyplakov²

2019

Int J Phys Stud Res

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The commonality of cyclic processes and rhythms of super volcanoes with periodic components of solar neutrino and muons fluxes is a subject of modern research. This study includes new additional factors -solar flares and thermal fields of radioactive structures. Experimental basis of research -simultaneous observations of temperature in the creek of the Yellowstone volcano caldera and in the laboratory of the Institute of Physics of the Russian Academy of Sciences on cesium and uranium ore 235. There is a shift of the maximum correlation by 36.5 days relative to variations in the temperature of cesium 137. That is, the flux of solar neutrinos and muons almost simultaneously affect cesium 137 and the radioactive substances of the magma chambers of the super volcano, but thermal variations of magma and surrounding structures reach the surface of the day and the sources of the stream in only 36.5 days. The study of the fine structure of temperature fields in the thickness of the Elbrus rocks as a super volcano was carried out with precision thermometers that allow temperature measurements with a sensitivity of ~0.005°C in the gallery of the North Caucasus Geophysical Observatory of the Physical Institute of Physics, Russian Academy of Sciences, that is, in the Baksan Gorge at a distance of 4100 m from the mouth of the Baksan Neutrino Division of the neutrino system. The inter correlation function between the radioactivity variations of uranium ore in the laboratory of the Institute of Physical Problems of the Russian Academy of Sciences with hourly averaging and variations in the temperature of a radioactive source during hourly averaging strongly correlate, that is, a forecast of the activation of volcanism by the level of radiation from a laboratory source is possible. On the other hand, one can point to the general sensitivity parameters of volcanoes: temperature fields, interaction with the neutrino solar flux, solar flares, and the level of radioactivity of the volcanic zone.

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