Studying of Deformation Processes by Two-Coordinate Laser Strainmeter

Grigory I. Dolgikh

V.I. Il'ichev Pacific Oceanological Institute Far Eastern Branch of Russian Academy of Sciences, Vladivostok, Russia.

DOI: 10.4236/ijcce.2013.22B005                

Abstract

The results of experimental data processing of a two-coordinate laser strainmeter are discussed. The two-coordinate laser strainmeter consists of two laser strainmeters which measuring shoulders are oriented along the lines “North- South” and “West-East”. Measurement accuracy of the earth's crust microdisplacements of these devices makes 0 to1 nm. Working frequency range is from 0 to 1000 Hz. Processing experimental data the main attention is paid to high tides, natural oscillations of the Earth, natural oscillations of geoblocks, superficial sea waves. It is established that after separate earthquakes the natural oscillations of regional geoblocks are strongly excited. Besides, it is revealed that quasiperiodic fluctuations of crust in the range of periods from 1 to 12 min. are caused by atmospheric processes. Besides, it is revealed that quasiperiodic oscillations of the earth's crust in the range of periods from 1 to 12 minutes are caused by atmospheric processes.

Keywords

Two-coordinate Laser Strainmeter; High Tides; Earthquakes; Natural Oscillations of the Earth; Natural Os-cillations of Geoblocks; Natural Oscillations of Bays; Superficial and Internal Sea Waves; Quasiperiodic Oscillations

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	G. I. Dolgikh and A. V. Mishakov, “On a Possibility of Prognosis of Crustal Earthquakes by Variations of the Stress-Strain Field of the Earth,” Doklady Earth Sciences, Vol. 437, No. 2, 2011, pp. 518-521. doi: 10.1134/S1028334X11040118
[2]	G. I. Dolgikh, S. G. Dolgikh, S. N. Kovalev, V. A. Chupin, V. A. Shvets and S. V. Yakovenko, “A Deformation Method for Determining the Tsunami Potential of Earthquakes,” Doklady Earth Sciences, Vol. 417, No. 8, 2007, pp. 1261-1264. doi: 10.1134/S1028334X07080296
[3]	G. I. Dolgikh, “Principles of Designing Single_Coordinate Laser Strainmeters,” Technical Physics Letters, Vol. 37, No. 3, 2011, pp. 204-206. doi: 10.1134/S1063785011030035
[4]	G. I. Dolgikh, S. G. Dolgikh, V. V. Ovcharenko, V. V. Chupin, V. A. Shvets and S. V. Yakovenko, “Laser strainmeter with an Accu-racy up to Picometers,” Instruments and Experimental Techniques, No. 2, 2013, p.138.