Letter | Published:

Geomagnetic effect associated with X-ray flare from Sco X-1

Naturevolume 257pages3536 (1975) | Download Citation



THE effect on the night-time lower ionosphere of X radiation from celestial sources is a topic of some controversy1–4. An X-ray flare from Sco X-1 has been shown to have a daytime effect on the ionosphere5 and it has also been reported6 that celestial X-ray sources have a nocturnal effect on the lower ionosphere in certain conditions. Galactic X-ray ionisation has been shown7–9 to affect night-time geomagnetic field components.

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  1. Indian Institute of Astrophysics, Kodaikanal, 624103, India



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