In:
Vestnik SSUGT (Siberian State University of Geosystems and Technologies), Siberian State University of Geosystems and Technologies, Vol. 27, No. 4 ( 2022), p. 31-44
Kurzfassung:
Gravity measurements with different kind of absolute gravimeters and spring gravimeters were started at the Marine Experimental Observatory Shults Cape of Il'ichev Oceanological Institute, Far East Branch of Russian Academy of Sciences from 2010 year. Simultaneously, on the polygone, located in the South of Primorie, started the geodetic measurements by GNSS methods for determination of the coordinates and study of gravimetric points’ displacements. Gravimetric measurements are used to solve structural and monitoring tasks. Planned and high-altitude geodetic measurements are necessary for the correct interpretation of gravimetric results and obtaining reduced gravity values. Complex measurements with absolute and relative gravimeters are used to test the metrological characteristics of relative gravimeters such as SCINTREX and GPhone. As a result of the analysis of tidal variations of gravity, corrections to the absolute data were obtained. Carrying out measurements at different altitudes using absolute gravimeters of the GABLM-M type made it possible to reduce the values of gravity and compare experimental and theoretical estimates. The results are used in structural geological studies in Primorie. The second task of the research was to determine the level of time variations of gravity, 3D displacements of the earth's surface and determine their nature. According to measure-ments in the period 2010–2020, the effects associated with the Japanese earthquake of 11.03.2011 with a magnitude of M = 9,0 were investigated. At a distance of 1000 km from the epicenter, the mag-nitude of post-seismic subsidence for the period 2012–2020 was 22 m, gravity increased by 6 microgal. According to the shape of the attenuation curve of vertical displacements, a model was selected and an estimate of Maxwell's time (T = 3 years) was obtained. Within the framework of a two-layer model, the viscosity of the earth's crust lower part – the asthenosphere on the edge of the continent – was determined.
Materialart:
Online-Ressource
ISSN:
2411-1759
Originaltitel:
Гравиметрические исследования на научном полигоне «Мыс Шульца»
DOI:
10.33764/2411-1759-2022-27-4
DOI:
10.33764/2411-1759-2022-27-4-31-44
Sprache:
Unbekannt
Verlag:
Siberian State University of Geosystems and Technologies
Publikationsdatum:
2022
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