(PDF) في 2008-05-29. "Dear Young Girl". مؤرشف من الأصل في 2015-12-24. "Auroraborealis observation journal of Sir George Back". Mccord-museum.qc.ca. مؤرشف
provoca una gran aurora boreal visible en toda España" [The strongest geomagnetic storm of the past 20 years causes a great auroraborealis visible in all
to terrestrial and interplanetary magnetism, the ionosphere and the auroraborealis" 1965 آلن لويد هودجكين "In recognition of his discovery of the mechanism