April 15 » Closing ceremony of the Games of the I Olympiad in Athens, Greece.
June 2 » Guglielmo Marconi applies for a patent for his wireless telegraph.
June 28 » An explosion in the Newton Coal Company's Twin Shaft Mine in Pittston, Pennsylvania results in a massive cave-in that kills 58 miners.
July 28 » The city of Miami, Florida is incorporated.
November 17 » The Western Pennsylvania Hockey League, which later became the first ice hockey league to openly trade and hire players, began play at Pittsburgh's Schenley Park Casino.
November 27 » Also sprach Zarathustra by Richard Strauss is first performed.
Day of death December 8, 1970
The temperature on December 8, 1970 was between 2.2 °C and 8.8 °C and averaged 4.7 °C. There was 6.1 hours of sunshine (77%). The partly clouded was. The average windspeed was 1 Bft (weak wind) and was prevailing from the north. Source: KNMI
February 11 » Japan launches Ohsumi, becoming the fourth nation to put an object into orbit using its own booster.
March 18 » Lon Nol ousts Prince Norodom Sihanouk of Cambodia.
July 8 » Richard Nixon delivers a special congressional message enunciating Native American self-determination as official US Indian policy, leading to the Indian Self-Determination and Education Assistance Act of 1975.
August 26 » A new feminist movement leads a nationwide Women's Strike for Equality.
September 6 » Two passenger jets bound from Europe to New York are simultaneously hijacked by Palestinian terrorist members of the PFLP and taken to Dawson's Field, Jordan.
September 11 » The Dawson's Field hijackers release 88 of their hostages. The remaining hostages, mostly Jews and Israeli citizens, are held until September 25.
When copying data from this family tree, please include a reference to the origin: Hans Groothelm, "Family tree Groothelm", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-groothelm/I36.php : accessed October 5, 2026), "Harmen Groothelm (1896-1970)".
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