The temperature on September 4, 1911 was between 5.1 °C and 22.1 °C and averaged 15.0 °C. There was 9.9 hours of sunshine (74%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north. Source: KNMI
January 3 » A magnitude 7.7 earthquake destroys the city of Almaty in Russian Turkestan.
June 28 » The Nakhla meteorite, the first one to suggest signs of aqueous processes on Mars, falls to Earth, landing in Egypt.
July 4 » A massive heat wave strikes the northeastern United States, killing 380 people in eleven days and breaking temperature records in several cities.
August 21 » The Mona Lisa is stolen by Vincenzo Peruggia, a Louvre employee.
September 25 » An explosion of badly degraded propellant charges on board the French battleship Liberté detonates the forward ammunition magazines and destroys the ship.
November 3 » Chevrolet officially enters the automobile market in competition with the Ford Model T.
When copying data from this family tree, please include a reference to the origin: J Eijsermans, "Eijsermans family tree", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eijsermans/I268791.php : accessed January 14, 2026), "Antonetta van Opstal (1911-)".
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