The temperature on January 4, 1911 was between 0.4 °C and 2.1 °C and averaged 1.3 °C. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
January 14 » Roald Amundsen's South Pole expedition makes landfall on the eastern edge of the Ross Ice Shelf.
August 21 » The Mona Lisa is stolen by Vincenzo Peruggia, a Louvre employee.
August 29 » Ishi, considered the last Native American to make contact with European Americans, emerges from the wilderness of northeastern California.
November 5 » After declaring war on the Ottoman Empire on September 29, 1911, Italy annexes Tripoli and Cyrenaica.
November 17 » Omega Psi Phi fraternity was founded on the campus of Howard University in Washington, D.C.
December 14 » Roald Amundsen's team, comprising himself, Olav Bjaaland, Helmer Hanssen, Sverre Hassel, and Oscar Wisting, becomes the first to reach the South Pole.
When copying data from this family tree, please include a reference to the origin: Hendrik Dreyer, "Dreyer Tree", database, Genealogy Online (https://www.genealogieonline.nl/dreyer-tree/I13106.php : accessed February 5, 2026), "Hans Jurgen Dreyer (1911-)".
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