Cases

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.

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

Owing to its water-proof design, the seismic station can operate in the 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 has successfully passed the test works in Orenburg region, Russia. Under 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 works 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 leaflet of "Low-Frequency Seismic Sounding (LFS)" by Gradient, our partner company. The company has a profound experience in using the CME-4111 и CME-4311 seismic sensors along with the Baykal-ACN recorders for 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.

Studies of the seismic vibrations of a 44-floor building using the commercially available angular velocity sensors METR-03 have been carried out. The presence of a rotational vibration mode around the vertical axis at a range of about 0.7 Hz has been established. Previously these modes were beyond registration by means of linear sensors.