Cases

Journal of Science and Technological Developments published a research article titled 'Autonomous Geohydroacoustic Ice Buoy of New Generation'. 

A geohydroacoustic ice buoy is a finalized measuring autonomous instrument including an analog one-component molecular-electronic measuring instrument of the CME-4211V type (based on the MET), a power source, a seismic data logger of the NDAS-8224 type. 

Seismic sensors based on the MET (molecular-electronic technology) are highly reliable instruments. They do not require neither any special means or methods for transportation and deployment, nor service or mass locking. Moreover, these instruments are well-suited for field surveys and for quick deployment of seismic network. 

The article provides the comparison results of long laboratory tests for Streckeisen, Guralp and CME (R-sensors) as well as confirms operability of the new instrument and its compliance to the world's analogues in its key parameters. 

The authors of the article are prominent scientists holding Grand PhDs and PhDs.

The Seismic Instruments journal published an article titled 'Feasibility of Using Molecular-Electronic Seismometers in Passive Seismic Prospecting: Deep Structure of the Kaluga Ring Structurefrom Microseismic Sounding' by The Schmidt Institute of Physics of the Earth founded in Moscow in 1928. 

The microseismic sounding survey was carried out along a geophysical profile crossing the central part of the structure with simultaneous data acquisition by molecular-electronic and conventional seismometers at each measurement point. Experimental data on the propagation of Rayleigh waves along the curvilinear surface were collected. 

The feasibility of using molecular-electronic seismometers by R-sensors for passive seismic studies were confirmed by the results of a comparative analysis of the vertical geophysical cross sections, which reveal upper crustal heterogeneities, and by the results of a series of laboratory tests.

The Journal of Seismology published an article of "New seismic array solution for earthquake observations and hydropower plant health monitoring". Some unique data was acquired by the METR-03 rotational seismometer. 

The rotational oscillation sensor is named as a significant addition to the security system which is installed in conjunction with accelerometer in the turbine hall and can increase the efficiency of cavitation hazard detection to a new level.

Three-component compact seismometers CME-4311 jointly with other equipment were used for large-scale tests of ice-rinks durability. 

The tests results were published in the article of 'Large-Scale Tests of ice-rinks durability for a bend in the Kara and Laptev seas' (in Russian) in Rosneft's science and technology journal. The article was written by a group of authors of the Rosneft oil company, Arctic and Antarctic Research Institute, Arctic scientific and design center for shelf technologies. 

The developed parameters monitoring of ice-rinks deformation processes is recommended to apply on drifting ices in real time as early warning systems that will allow to reduce risks when working in polar expeditions, to increase people's safety on ice and to avoid equipment losses.

The tests of an underwater self-contained wireless seismic station developed by the Center for Molecular Electronics of MIPT and R-sensors were held near the Golubitsky mud volcano at the Azov Sea shore (Krasnodar region, south of Russia) in the expedition organized by The Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences. 

Owing to its water-proof design, the above mentioned seismic station can operate in transition zones including partial or full immersion. The built-in Li-Ion accumulator allows several days of autonomous recording while the installed Wi-Fi wireless interface gives an opportunity to read recorded data remotely. A GNSS/GPS receiver detects the station's position and helps adjust a reference generator. The sensing unit is based on the modified MTSS-2003 three-component high gain seismic sensors.

One-component seismic sensor MTSS-1021 successfully passed tests in Orenburg region of Russia. At the experimental work, a signal induced by an all-terrain vibrator was recorded simultaneously by a row of 240 sensors at a 50-meter step. Thus, the 2-D profile along the line of over 300 kilometers was consecutively collected. The results were verified by comparing it with the data obtained with conventional moving-coil geophones GS-20DX-1. The tests were performed by 'Sibgeotekhservis' and our subsidiary company 'Seismotronika' on the request of The Federal agency for subsoil resources management of Russia. 

The MTSS-1021 sensor is designed by R-sensors and Seismotronika as a part of SCOUT multichannel seismic wireless data acquisition system by Special Design Bureau for Seismic Instrumentation ("SKB SP"), Saratov, Russia. The sensor shares similar parameters with the MTSS-1001 but has self-contained power supply and is equipped with exchangeable Li-Pol accumulators. 

Apart from the main tests, the ability of the METR-01 rotational sensors to register the Rayleigh waves directly was tested and verified. The information on the surface waves is sufficient for eliminating their interference with the desired signal.

The Case Study of R-sensors' seismometers used for low-frequency seismic sounding (LFS). 

The leaflet on 'Low-Frequency Seismic Sounding' was released by Gradient, our partner company. The company has a profound experience in using the CME-4111 и CME-4311 seismometers along with the Baykal-ACN recorders for passive seismic exploration.

The article of "Survey for Nordenskiöld glacier by seismological methods" (in Russian) was published. CME-4111 seismometers and Baykal-7HR recorders were used to record signals.

The article of "Asymmetric caldera-related structures in the area of the Avacha group of volcanoes in Kamchatka as revealed by ambient noise tomography and deep seismic sounding" is published in Journal of Volcanology and Geothermal Research. 

This incredible work studies the volcanoes activity for a year time span. The areas of observation are accessible for a couple of month in mid-summer, so the equipment was left for another 10 months and the data were picked up a year after the deployment. Data loggers Baikal-ACN-87 and broadband seismometers CME-4311 were used in this experiment.

The Journal of Seismology published an article of "Seismicity at the convergent plate boundary offshore Crete, Greece, observed by an amphibian network". The data were retrieved by means of CME-4111-OBS ocean-bottom seismometers.