The temperature on June 20, 1911 was between 9.9 °C and 18.0 °C and averaged 13.3 °C. There was 9.6 mm of rain. There was 3.0 hours of sunshine (18%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
January 3 » A magnitude 7.7 earthquake destroys the city of Almaty in Russian Turkestan.
July 7 » The United States, UK, Japan, and Russia sign the North Pacific Fur Seal Convention of 1911 banning open-water seal hunting, the first international treaty to address wildlife preservation issues.
August 14 » United States Senate leaders agree to rotate the office of President pro tempore of the Senate among leading candidates to fill the vacancy left by William P. Frye's death.
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.
December 27 » "Jana Gana Mana", the national anthem of India, is first sung in the Calcutta Session of the Indian National Congress.
Day of death May 12, 1988
The temperature on May 12, 1988 was between 10.0 °C and 23.1 °C and averaged 17.5 °C. There was 12.3 hours of sunshine (79%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. 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.
February 29 » South African archbishop Desmond Tutu is arrested along with one hundred other clergymen during a five-day anti-apartheid demonstration in Cape Town.
March 16 » Halabja chemical attack: The Kurdish town of Halabja in Iraq is attacked with a mix of poison gas and nerve agents on the orders of Saddam Hussein, killing 5,000 people and injuring about 10,000 people.
March 16 » Iran–Contra affair: Lieutenant Colonel Oliver North and Vice Admiral John Poindexter are indicted on charges of conspiracy to defraud the United States.
June 4 » Three cars on a train carrying hexogen to Kazakhstan explode in Arzamas, Gorky Oblast, USSR, killing 91 and injuring about 1,500.
August 28 » Ramstein air show disaster: Three aircraft of the Frecce Tricolori demonstration team collide and the wreckage falls into the crowd. Seventy-five are killed and 346 seriously injured.
August 31 » Delta Air Lines Flight 1141 crashes during takeoff from Dallas/Fort Worth International Airport, killing 14.
When copying data from this family tree, please include a reference to the origin: Jan Kaper, "Family tree Kaper", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kaper/I79421.php : accessed February 18, 2026), "Siebren Arthur VanderWagen (1911-1988)".
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