The temperature on December 9, 1904 was between -1.2 °C and 3.5 °C and averaged 1.5 °C. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southeast. Source: KNMI
January 17 » Anton Chekhov's The Cherry Orchard receives its premiere performance at the Moscow Art Theatre.
January 23 » Ålesund Fire: the Norwegian coastal town Ålesund is devastated by fire, leaving 10,000 people homeless and one person dead. Kaiser Wilhelm II funds the rebuilding of the town in Jugendstil style.
February 7 » A fire begins in Baltimore, Maryland; it destroys over 1,500 buildings in 30 hours.
April 30 » The Louisiana Purchase Exposition World's Fair opens in St. Louis, Missouri.
June 15 » A fire aboard the steamboat SSGeneral Slocum in New York City's East River kills 1,000.
November 16 » English engineer John Ambrose Fleming receives a patent for the thermionic valve (vacuum tube).
Day of death December 9, 1987
The temperature on December 9, 1987 was between -7.7 °C and -3.4 °C and averaged -5.3 °C. There was 0.7 hours of sunshine (9%). The partly clouded was. The average windspeed was 1 Bft (weak wind) and was prevailing from the east-southeast. Source: KNMI
In The Netherlands , there was from Tuesday, November 4, 1986 to Tuesday, November 7, 1989 the cabinet Lubbers II, with Drs. R.F.M. Lubbers (CDA) as prime minister.
January 4 » The Maryland train collision: An Amtrak train en route to Boston from Washington, D.C., collides with Conrail engines in Chase, Maryland, United States, killing 16 people.
May 1 » Pope John Paul II beatifies Edith Stein, a Jewish-born Carmelite nun who was gassed in the Nazi concentration camp at Auschwitz.
May 15 » The Soviet Union launches the Polyus prototype orbital weapons platform. It fails to reach orbit.
June 8 » New Zealand's Labour government establishes a national nuclear-free zone under the New Zealand Nuclear Free Zone, Disarmament, and Arms Control Act 1987.
June 28 » For the first time in military history, a civilian population is targeted for chemical attack when Iraqi warplanes bombed the Iranian town of Sardasht.
September 13 » Goiânia accident: A radioactive object is stolen from an abandoned hospital in Goiânia, Brazil, contaminating many people in the following weeks and causing some to die from radiation poisoning.
When copying data from this family tree, please include a reference to the origin: Peeters Mathieu, "FutureHistory", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-riske/I23817.php : accessed December 26, 2025), "Helena van Heygen (1904-1987)".
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