排序方式： 共有41条查询结果，搜索用时 296 毫秒
21.
Yu. A. Berzhinskii A. P. Ordynskaya A. S. Gladkov O. V. Lunina L. P. Berzhinskaya N. A. Radziminovich Ya. B. Radziminovich V. S. Imayev A. V. Chipizubov O. P. Smekalin 《Seismic Instruments》2010,46(4):307-324
The paper deals with issues related to the testing of the ESI-2007 scale by using as an example the real seismic event that
occurred on August 27, 2008 in South Baikal. The main objective of the paper is to carry out a comparative assessment of the
earthquake’s intensity based on traditional macroseismic scales and environmental seismic intensity (ESI-2007) scales. The
results of the macroseismic survey served as the initial data. Analysis has been made on the ESI-2007 scale in conformity
with the requirements for seismic scales. Particular emphasis has been placed on the type (or rank) of the ESI-2007 scale.
Such an investigation is one of the first cases of the application of a new scale by the example of a regional seismic event. 相似文献
22.
V. I. Melnikova A. I. Seredkina Ya. B. Radziminovich A. I. Melnikov N. A. Gilyova Ts. A. Tubanov 《Seismic Instruments》2016,52(4):290-300
We described the February 1, 2011 (Mw = 4.7) Zagan earthquake occurred in the area of the Zagan range. This event is one of the most significant in western Transbaikalia. Macroseismic effects of this seismic event were felt over a wide territory: the intensity of II was observed at the distance of more than 300 km. Earthquake focal parameters (hypocentral depth, seismic moment, moment magnitude and focal mechanism) calculated from the data on surface wave amplitude spectra correspond to the structural position of the origin connected with a zone of plastic flow (slip) bordering the northwest slope of the Zagan range (similar complex of the metamorphic core). The results obtained prove the existence of the continental extension processes in this area. 相似文献
23.
The earthquake of February 1 (January 21 in the Julian Calendar), 1725 was for a long time considered not only the earliest precisely dated historical seismic event in eastern Siberia, but also the most powerful earthquake for the entire period of recorded seismic events in the region: M = 8.2 (Novyi katalog…, 1977). The epicenter location (Stanovoy Upland) and the magnitude of the event were assessed on the basis of very scanty historical data, as well as using paleoseismogeological information. The February 1, 1725 event received the name “The Great East Siberian” earthquake and served for decades as decisive evidence for the assessment of the seismic hazard and seismic zoning of the northeastern flank of the Baikal rift zone. However, the solution of the focal parameters in the (Novyi katalog…, 1977) has caused serious doubts. In this paper a newly elaborated version is proposed that is based on a detailed reevaluation of the initially known macroseismic information, as well as additional historical data that previously had not come to the attention of seismologists. As the result, a different solution of the focal parameters (51.8° N; 113.0° E, eastern Transbaikalia) and a significantly lower magnitude (M = 6.0) compared with the parameters given in (Novyi katalog…, 1977) were obtained. The presented solution makes us more attentive to the estimates of seismic hazard in east Transbaikalia based on historical data, as well as to the historical data themselves. 相似文献
24.
Alena I. Seredkina Valentina I. Melnikova Nadezhda A. Gileva Yan B. Radziminovich 《Journal of Seismology》2015,19(3):685-694
We described the 2014 January 17 earthquake (M w?=?4.3) occurred on the Siberian platform in the area of sublongitudinal part of the Angara river in the zone of possible influence of two large reservoirs—Ust-Ilimsk and Boguchan. This is the first event of such magnitude recorded in this previously aseismic area during the whole period of instrumental observations. A seismic moment, a moment magnitude, a hypocentral depth, and a focal mechanism of the event were calculated on the basis of surface wave amplitude spectra. Analysis of the geological and geophysical data showed that the earthquake origin is connected with high-velocity gradient zone located at the border of the Late Proterozoic cover and the Precambrian basement of the Siberian platform. Some evidences for a natural character of the earthquake were considered. 相似文献
25.
26.
Doklady Earth Sciences - According to seismological and geodetic data, the central part of the South Baikal basin is under an extension regime of the Earth’s crust. This study presents for... 相似文献
27.
E.G. Vologina I.A. Kalugin Yu.N. Osukhovskaya M. Sturm N.V. Ignatova Ya.B. Radziminovich A.V. Dar&#x;in M.I. Kuz&#x;min 《Russian Geology and Geophysics》2010,51(12):1275-1284
The paper presents the results of a comprehensive investigation into the recent sediments of Proval Bay. This bay formed during catastrophicflooding of a big block of land as a result of an earthquake in 1862. Comparison of the sketch map of the bay for 1862 with its modern mapshows that the boundary of the Selenga River delta has shifted considerably eastward. The sediments of Proval Bay are sands, silty pelite,and pelitic silt. Terrigenous material is predominant and consists of mineral grains and land plant remains, admixed with diatom frustules andsponge spicules. In the southwestern part of the bay, turbidites and a soil layer have been found. The latter was buried when the water levelin Lake Baikal rose after the construction of the Irkutsk dam in 1959–1964. In the northeastern part of the bay, a peatlike layer has beenfound in the bottom sediment core. It formed in Lake Beloe, which existed in the Tsagan steppe before the 1862 earthquake. According todiatom analysis, this lake was shallow and eutrophic. The sedimentation rates in different parts of Proval Bay differ greatly and directly dependon proximity to the Selenga River. Variations in the geochemical indicators which reflect the ratio of organic to clastic components in thebottom sediments of the bay are controlled by temperature and water level variations in Lake Baikal. 相似文献
28.
29.
30.
Bornyakov S. A. Dobrynina A. A. Seminsky K. Zh. Sankov V. A. Radziminovich N. A. Salko D. V. Shagun A. N. 《Doklady Earth Sciences》2021,498(1):427-431
Doklady Earth Sciences - The results of studying the Bystrinskii earthquake of September 21, 2020, in the southern Baikal region are presented. Its geodynamic position, focal mechanism, and basic... 相似文献