Enhancement of optical aurora triggered by the solar wind negative pressure impulse (SI

@inproceedings{Sato2001EnhancementOO,
  title={Enhancement of optical aurora triggered by the solar wind negative pressure impulse (SI},
  author={Natsuo Sato and Yozo Murata and Hisao Yamagishi and Akira sessai Yukimatu and Masayuki Kikuchi and Masakazu Watanabe and Kazuo Makita and Huigen Yang and Ruiyuan Liu and Frederick Joseph Rich},
  year={2001}
}
A geomagnetic negative sudden impulse (SI−) occurred on 3 August 1997 in association with a sudden decrease of solar wind dynamic pressure. The discrete auroras observed by an all-sky TV imager at Zhongshan in Antarctica (magnetic latitude is ∼74.5°S) suddenly enhanced their luminosity and moved poleward at the time of the SI−. Following the primary enhancement, three cycles of quasi-periodic luminosity pulsations were observed with periods of about 10–14 min and their average position drifted… CONTINUE READING