L’une des plus grandes taches solaires depuis des années vient de tourner sur le limbe nord-est du soleil. AR3112 a un champ magnétique à polarité mixte qui abrite de l’énergie pour de fortes éruptions solaires de classe X.
L’apparition de cette tache solaire dangereuse pourrait annoncer deux semaines d’activité solaire élevée alors qu’elle transite par la face du soleil faisant face à la Terre. Histoire complète
@ Spaceweather.com
Ne manquez pas la prochaine éruption solaire : Abonnés à notre Space Weather Alert Service receive instant text messages when strong solar flares are underway.
I recall when
What is the Antarctic? Some extraordinary nature on the border between the earthly and the cosmic? A treasure trove of natural resources of global importance? A land with a no longer small
Dr Ivanov has taken part in several Antarctic expeditions. In 2004, Ivanov went with Doychin Vasiley on the Tangra 2004 topographic
Thanks to Olivier F6EPN (aka Spratley Woody at his Facebook page), another old and rare QSL card, KC4USA dated 1949 proves that Ham Radio was performed at this Base, which was not present on WAP-WADA Directory.
After the war, Little America IV consisting of an airstrip and 60 tents, was set up nearby as a headquarters for Operation High Jump (1946–47), an expedition designed to explore and document Antarctica’s coastline as well as to extend U.S. sovereignty to the continent. When an expedition next returned (1956) in preparation for the International Geophysical Year (1957–58), parts of the earlier Little America camps were found to have vanished because of calving of the ice shelf.
Little America IV camp was thug established as US Navy’s Operation Highjump, of 1946–1947.
Radioamateur médaillé d’or IVA
