April 18 » The 7.5 Mw Guatemala earthquake shakes Guatemala with a maximum Mercalli intensity of VIII (Severe), killing between 800–2,000.
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 31 » Second Boer War: The Treaty of Vereeniging ends the war and ensures British control of South Africa.
August 22 » Cadillac Motor Company is founded.
December 10 » The opening of the reservoir of the Aswan Dam in Egypt.
Day of death August 20, 1970
The temperature on August 20, 1970 was between 12.8 °C and 19.7 °C and averaged 16.2 °C. There was 0.1 mm of rain. There was 4.1 hours of sunshine (28%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
January 22 » The Boeing 747, the world's first "jumbo jet", enters commercial service for launch customer Pan American Airways with its maiden voyage from John F. Kennedy International Airport to London Heathrow Airport.
April 24 » China launches Dong Fang Hong I, becoming the fifth nation to put an object into orbit using its own booster.
April 29 » Vietnam War: United States and South Vietnamese forces invade Cambodia to hunt Viet Cong.
May 15 » Philip Lafayette Gibbs and James Earl Green are killed at Jackson State University by police during student protests.
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.
October 12 » Vietnam War: Vietnamization continues as President Nixon announces that the United States will withdraw 40,000 more troops before Christmas.
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/I138491.php : accessed October 22, 2026), "Johannes Boersma (1902-1970)".
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