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Effect of an X-Class Solar Flare on the OI 630 nm Dayglow EmissionsWe present a striking event that shows a prompt effect of an X-class solar flare (X6.2/3B) in the neutral optical dayglow emissions. This flare occurred on 13 December 2001 at 1424 UT and peaked at 1430 UT. The peak-to pre-flare X-ray intensity ratio as observed by GOES-10 was greater than 300 and the EUV flux observed by SEM/SOHO was greater by around 60%. As a response to this flare, the daytime redline (OI 630 nm) column integrated emission intensity measured from Carmen Alto (23.16degS, 70.66degW), in Chile, showed a prompt increase of around 50%. Our results show that this prompt enhancement in the thermospheric dayglow seems to be caused mainly due to an increase in photoelectrons due to a sudden increase in the solar EUV flux associated with this flare.
Document ID
20110012992
Acquisition Source
Johnson Space Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Das, Uma
(Physical Research Lab. Ahmedabad, India)
Pallamraju, Duggirala
(Physical Research Lab. Ahmedabad, India)
Chakrabarti, Supriya
(Boston Univ. Boston, MA, United States)
Date Acquired
August 25, 2013
Publication Date
August 4, 2010
Publication Information
Publication: Journal of Geophysical Research
Volume: 115
Subject Category
Solar Physics
Funding Number(s)
CONTRACT_GRANT: NNX08AR38G
CONTRACT_GRANT: NNX06C04G
Distribution Limits
Public
Copyright
Other

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