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摘要
Analysis of the observational data of Global Seismic Networks (GSN) and China Earthquake Networks Center (CENC) suggests that the strong cold vortex cyclones in northern Europe (Nordic Storm) from the North Atlantic and Arctic Ocean can cause vibrations of the continent. For example, the vibration caused by the strong cyclone storm in Scandinavia landing from Norway Sea has been observed by nearly all the seismographs in Eurasia. There are two main signals in the observation of such vibrations: one signal whose frequency is mainly in the band of 0. 15 similar to 0. 25 Hz (4 similar to 7 s in period), and the other one is surface waves which are at frequency from 0. 08 to 0.12 Hz (about 8 to 12 s in period), while each of which is generated by a distinct mechanism. Because of the differences of storms in different seas and land areas, the vibrations caused by them differ from each other. These differences might be related to the landform characteristics of paths the storm passed, meanwhile the special vibration signals excited during the movement of the cyclones are also depend on the shallow sea where the cyclones passed, the sea depth, the landform of the landing site, the cyclones' structure and the position distribution of observation sites with respect to the cyclones. Seismic observations permit to monitor the development and change processes cyclones in time and space, which are much helpful for the research of the influence of the interaction between the cyclone and the surface of the earth during the cyclone motion.
- 出版日期2017-8
- 单位华中科技大学
