About seismic observations on Sakhalin with the use of molecular-electronic seismic sensors of new type

Abstract

To conduct complex geophysical observations in the area of the Central Sakhalin Fault, an experimental geophysical test site was created, including a broadband molecular electronic type station and a new development of the Molecular Electronics Center - molecular electronic hydrophone. A module for placing a molecular-electronic seismometer at the test site has been developed and arranged. The noise level of the seismometer was analyzed and compared with the reference data. The results of hydroacoustic observations of weak earthquakes in the area of the Central-Sakhalin fault using a molecular-electron hydrophone are presented. The characteristics of the recorded acoustic emission signals from earthquakes perceived by the hydrophone station (frequency spectrum, arrival times of seismic waves) are investigated. The issues of operation and maintenance of molecular-electronic sensors with seismic signal data logger at various stages of seismological observations (setting up equipment, acquisition and storing data) were considered. The analysis of recording capabilities of seismic equipment was performed. Conclusions about the advantages and disadvantages of molecular-electronic sensors and their use on Sakhalin are made.

Modeling of the MET Sensitive Element Conversion Factor on the Intercathode Distance

“…Initially, the MET-based sensors were used to measure low-frequency signals in seismometry [ 3 , 4 , 5 , 6 ]. Currently, the range of their application has expanded significantly and includes seismic exploration [ 7 , 8 ], hydroacoustics [ 9 , 10 , 11 ], monitoring of buildings and structures [ 12 , 13 ], medical applications [ 14 ], and inclinometry [ 15 ]. The reason for a noticeable expansion of applications is the development of new types of converting elements providing a significant expansion of the working frequency range in the high-frequency region.…”

The experimental results of the geophysical pulse voltage generator

“…In 2020 the experiments have been continued on the geophysical proving ground of IMGG FEB RAS located in village of «Petropavlovskoe». A molecular electronic hydrophone MTAS-30 and a seismometer CME-6111 were used during the experiments in order to register the seismic changes [4][5][6]. We used a multi-electrodes system located on closely-spaced pits [7] to register the geoelectric processes in the near-surface part on the tectonosphere-atmosphere interface.…”

Frequency Response of a Six-Electrode MET Sensor at Extremely Low Temperatures

“…Seismic sensors are used to measure small vibrations in applications such as seismology [1,2], mineral exploration [1][2][3], structural monitoring [4][5][6][7] and nuclear test monitoring. At the same time, these sensors are often used in field measurements, where they must have stable characteristics over a wide temperature range.…”