|
|||||
|
|
Estimation of coseismic deformation, poroelasticity, and fracturing of rocks from the data on water level in a borehole |
|
| Authors: | V Yu Timofeev D G Ardyukov E V Boiko A V Timofeev A V Yaroshevich P Yu Gornov |
| Institution: | 1. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch, Russian Academy of Sciences, pr. Akad. Koptyuga 3, Novosibirsk, 630090, Russia 2. Irkutsk Territorial Center for State Monitoring of Geological Environment, ul. Eniseiskaya 37, Tomsk, 634021, Russia 3. Kosygin Institute of Tectonics and Geophysics, Far East Branch, Russian Academy of Sciences, ul. Kim Yu Chena 65, Khabarovsk, 680000, Russia |
| Abstract: | Variations in the water level in boreholes emerge in response to tidal, baric, and tectonic forcing. We analyze the data on atmospheric pressure and water level recorded in the boreholes located in the mid-latitude Eurasia (45°?C55°N) from Western Europe (Belgium, Uccle), Siberia (coastal area of Lake Baikal, Talaya River) to Far Eastern Russia (the Bychikha borehole near Khabarovsk and the boreholes on the Kamchatka Peninsula and Kurils). The response of the water level in a borehole to periodic tidal and baric impacts is investigated. In this case, water level variations reflect areal (lateral) and vertical deformations, which allows estimating the elastic moduli and porosity of the confined aquifer in a static model. Measurements in the boreholes drilled in the fractured solid rock enable determining the geometric parameters of the fractures. The possibility to apply the method for evaluating tectonic deformations is discussed. Application of tidal coefficients of boreholes for determining the coseismic deformation is demonstrated by the example of the Kultuk earthquake (Lake Baikal, August 27, 2008, M = 6.3). |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |