April 18 » The 7.5 Mw Guatemala earthquake shakes Guatemala with a maximum Mercalli intensity of VIII (Severe), killing between 800–2,000.
April 20 » Pierre and Marie Curie refine radium chloride.
May 8 » In Martinique, Mount Pelée erupts, destroying the town of Saint-Pierre and killing over 30,000 people. Only a handful of residents survive the blast.
May 17 » Greek archaeologist Valerios Stais discovers the Antikythera mechanism, an ancient mechanical analog computer.
May 20 » Cuba gains independence from the United States. Tomás Estrada Palma becomes the country's first President.
August 22 » Theodore Roosevelt becomes the first President of the United States to make a public appearance in an automobile.
Day of death July 20, 1911
The temperature on July 20, 1911 was between 10.6 °C and 24.4 °C and averaged 18.8 °C. There was 6.7 hours of sunshine (42%). The average windspeed was 2 Bft (weak wind) and was prevailing from the west-southwest. Source: KNMI
February 18 » The first official flight with airmail takes place from Allahabad, United Provinces, British India (now India), when Henri Pequet, a 23-year-old pilot, delivers 6,500 letters to Naini, about 10 kilometres (6.2mi) away.
May 23 » The New York Public Library is dedicated.
September 1 » The armored cruiser Georgios Averof is commissioned into the Greek Navy. It now serves as a museum ship.
September 24 » His Majesty's Airship No. 1, Britain's first rigid airship, is wrecked by strong winds before her maiden flight at Barrow-in-Furness.
September 25 » An explosion of badly degraded propellant charges on board the French battleship Liberté detonates the forward ammunition magazines and destroys the ship.
October 13 » Prince Arthur, Duke of Connaught and Strathearn, becomes the first Governor General of Canada of royal descent.
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/I79961.php : accessed October 6, 2026), "Jantje Kazemier (1902-1911)".
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