The USGS network of magnetic observatories monitored activity from the Halloween storm in collaboration with international partn
ers. The storm played tricks on technological systems around the world, which scientists continue to analyze even today. During the Halloween storm, geomagnetic orientation used for directional drilling for oil and gas in Alaska was disrupted, as were airborne magnetic and geophysical surveys around the world. Interference with over-the-horizon radio communication even forced cancellation of airline polar routes and their diversion to lower latitudes. Communication interference forced the Department of Defense to cancel a maritime mission. GPS accuracy was significantly degraded, affecting land and ocean surveys, and commercial and military aircraft navigation. Civilian and military satellites were put into a protective operating mode, other satellites were damaged, and a Japanese scientific satellite was permanently disabled. Astronauts onboard the International Space Station took precautionary shelter to avoid excessive levels of radiation. Additionally, geomagnetically-induced currents in the Earth's crust caused stress in the electric-power grids in North America, forcing system operators to take measures to prevent blackouts. Source: http://www.usgs.gov/blogs/features/usgs_top_story/the-magnetic-storm-of-halloween-2003-2/ Which of the following correctly illustrates the central idea of this text? Additionally, geomagnetically-induced currents in the Earth's crust caused stress in the electric-power grids in North America, forcing system operators to take measures to prevent blackouts. Civilian and military satellites were put into a protective operating mode, other satellites were damaged, and a Japanese scientific satellite was permanently disabled. Communication interference forced the Department of Defense to cancel a maritime mission. The storm played tricks on technological systems around the world, which scientists continue to analyze even today.
Adjective clauses usually start with words like who, which,where and why.I think the sentence you are looking for is A. Adjective clause being "which many people love".
