China
Africa
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Federal Government Applications of UAS Technology
Published in J.B. Sharma, Applications of Small Unmanned Aircraft Systems, 2019
The Team was routinely asked to provide 24 × 7 surveillance including separate UAS operations (requiring three shifts) to cover FEMA and HVO data requests to provide situational awareness missions for emergency managers to assess spillovers and new lava channel breakouts. All collected data, approved by government and emergency managers for release, have been organized and made available to the emergency managers and Volcano Science Centers for immediate access and investigations are underway for long-term archiving, distribution, and analysis (USGS NUPO 2018a; Zoeller et al. 2018).
Discussion on the sea–land telluric current vector and its continuity during a geomagnetic storm based on coastal stations in China and Canada
Published in Geomatics, Natural Hazards and Risk, 2019
Xin Zhang, Qing Ye, Gaochuan Liu
This model also discusses the existence of such low resistance channels in the eastern coastal land of China. First, the Tanlu fault zone in eastern China is a deep fault of orthonormal structure with depth of nearly 80–100 km, at least it is a lithospheric fault below the crystallization base. It is the basis of the low resistance channel of the model. Secondly, according to the estimation of magnetotelluric and heat flow data, the depth of the high conductivity layer considered in the model is only 45–50 km, which is far less than the cutting depth of the fault. Therefore, the high conductivity layer is reasonable as a low resistance current channel (Baba et al. 2013). Thirdly, for the Western Pacific, the Hawaiian Islands, the Japanese Islands and the Philippine Islands are all back-arc volcanic islands (Uyeda et al. 2000; Zheng et al. 2013), so the lava channel may be the path where the current rises to the surface in the model.