Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jass...24..111l&link_type=abstract
Journal of Astronomy and Space Sciences. Vol. 24, no. 2, 111-118
Astronomy and Astrophysics
Astronomy
94.05.Sd Space Weather
Scientific paper
We have studied energetic neutral atom (ENA) disturbances during the magnetic storm main phase that occurred on October 3, 2001, using the ENA data from the HENA instrument onboard the IMAGE spacecraft. We find that the main phase is characterized by five ENA enhancement events that occurred quasi-periodically. The repetitive ENA enhancements are most significant in the highest energy (138--222 keV) oxygen channel and become less significant for hydrogen and in lower energies. Also they are separated by ˜1.2 to ˜1.7 hrs, which is well below an average period usually seen for other repetitive injection events.
Choi Cheong-Rim
Kim Hee-Jeong
Lee Dong-Yup
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