Abstract
The new-generation geohydroacoustic buoy prototype is designed for simultaneous acquisition of acoustic, hydroacoustic, and seismoacoustic data in various environmental conditions, including onshore and offshore boreholes, yet is specifically targeted for operation in Arctic seas as an element of the distributed ice-class drifting antennas. Modular structure of the geohydroacoustic ice buoy incorporates the advanced data logger and a combination of sensors: vector–scalar hydroacoustic (0.01–2.5 kHz) accelerometer, broadband molecular–electronic (0.03–50 Hz) velocimeter, as well as optional hydrophones. The distinguishing feature of the geohydroacoustic buoy is its low power consumption responsible for consistent autonomous operation of the entire measurement system for at least one week. Results of continuous laboratory tests carried out at the geophysical observatory of the Geophysical Survey of the Russian Academy of Sciences (GS RAS) in Obninsk are presented. It has been confirmed via comparative analysis of recorded time series featuring microseismic noise and teleseismic earthquakes that the prototype well meets the high standards of modern seismology.
Highlights
The recently approved Strategy for the Development of the Arctic Zone of the Russian Federation defines an overall set of measures aimed at solving the main problems of the development of the Arctic zone and ensuring the interests of national security with a planning horizon up to the year of 2035, taking into account the peculiarities of climatic and geo-ecological conditions
The precision seismometer was a Streckeisen STS-1V/VBB velocimeter—the main instrument of the continuously operating Obninsk seismic station (OBN) which is a part of Global Seismograph Network—IRIS/IDA; in addition, the data were analyzed with a Güralp CMG-3ESP velocimeter
Considering the figures, it can be noted that both investigated geohydroacoustic buoys have an insignificant change in the frequency composition of the recorded signals and, we can talk about some change in their characteristics depending on the ambient temperature
Summary
The recently approved Strategy for the Development of the Arctic Zone of the Russian Federation defines an overall set of measures aimed at solving the main problems of the development of the Arctic zone and ensuring the interests of national security with a planning horizon up to the year of 2035, taking into account the peculiarities of climatic and geo-ecological conditions. The integrated approach to the development of natural resources in the Arctic, on the one hand, and the preservation of the environment in a changing climate, developed in the framework of this study, is essentially linked with the improvement of existing and development of new geophysical technologies for exploration and monitoring of hydro-carbon reserves in the ice-covered Arctic seas To solve these problems in the Arctic, the Russian earthquake monitoring system is being created [1] for seismic and infrasonic monitoring of glaciers. When exploring the polar islands, when the time spent by the research groups is strictly limited in time and every minute of research is very important
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