The temperature on April 12, 1911 was between 0.6 °C and 6.6 °C and averaged 4.5 °C. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
January 21 » The first Monte Carlo Rally takes place.
May 21 » President of Mexico Porfirio Díaz and the revolutionary Francisco Madero sign the Treaty of Ciudad Juárez to put an end to the fighting between the forces of both men, concluding the initial phase of the Mexican Revolution.
May 31 » The President of Mexico Porfirio Díaz flees the country during the Mexican Revolution.
July 24 » Hiram Bingham III re-discovers Machu Picchu, "the Lost City of the Incas".
September 23 » Pilot Earle Ovington makes the first official airmail delivery in America under the authority of the United States Post Office Department
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.
Day of death April 13, 1911
The temperature on April 13, 1911 was between -0.4 °C and 10.4 °C and averaged 5.8 °C. There was 8.0 hours of sunshine (58%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north. Source: KNMI
January 15 » Palestinian Arabic-language Falastin newspaper founded.
March 25 » In New York City, the Triangle Shirtwaist Factory fire kills 146 garment workers.
May 9 » The works of Gabriele D'Annunzio are placed in the Index of Forbidden Books by the Vatican.
May 15 » More than 300 Chinese immigrants are killed in the Torreón massacre when the forces of the Mexican Revolution led by Emilio Madero take the city of Torreón from the Federales.
August 29 » Ishi, considered the last Native American to make contact with European Americans, emerges from the wilderness of northeastern California.
November 11 » Many cities in the Midwestern United States break their record highs and lows on the same day as a strong cold front rolls through.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I118931.php : accessed October 17, 2026), "Hielke Merkus (1911-1911)".
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