태양-지구 연결: 지자기활동기간중의 대기열역학적 특성

Abstract

Over the past several decades, it has become increasingly clear that solar storms have had an impact on human activity, especially those activities related to technology and orbital space resources. A particularly egregious example involves the events surrounding the March 1989 storm [Allen et al., 1989]. On March 6, 1989, a large and complex sunspot group that had rotated into Earth view produced the first of several very powerful X-ray flares. From March 6 to March 19, this sunspot group produced 11 large X-class X-ray flares and 48 M-class flares with many associated terrestrial consequences. Aurora was observed at unusual locations: the Tropic of Capricorn in Australia, Grand Cayman Island in the Caribbean Sea. A long lasting ‘Polar Cap Absorption’ event occurred as well as a significant decrease in the cosmic ray flux, a Forbush event. The terrestrial ionosphere was greatly disturbed, resulting in one of the most magnetically disturbed periods since record keeping began in the mid-nineteenth century.