The temperature on June 11, 1911 was between 2.1 °C and 17.6 °C and averaged 10.8 °C. There was 11.1 hours of sunshine (67%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
January 3 » A magnitude 7.7 earthquake destroys the city of Almaty in Russian Turkestan.
May 21 » President of Mexico Porfirio Díaz and the revolutionary Francisco Madero sign the Treaty of Ciudad Juárez to put an end to the fighting between the forces of both men, concluding the initial phase of the Mexican Revolution.
June 16 » IBM founded as the Computing-Tabulating-Recording Company in Endicott, New York.
August 1 » Harriet Quimby takes her pilot's test and becomes the first U.S. woman to earn an Aero Club of America aviator's certificate.
August 29 » The Canadian Naval Service becomes the Royal Canadian Navy.
November 5 » After declaring war on the Ottoman Empire on September 29, 1911, Italy annexes Tripoli and Cyrenaica.
Day of death September 15, 1986
The temperature on September 15, 1986 was between 7.7 °C and 12.6 °C and averaged 9.3 °C. There was 7.0 mm of rain during 5.9 hours. There was -0.1 hours of sunshine (0%). The almost completely overcast was. The average windspeed was 2 Bft (weak wind) and was prevailing from the northeast. Source: KNMI
In The Netherlands , there was from Thursday, November 4, 1982 to Monday, July 14, 1986 the cabinet Lubbers I, with Drs. R.F.M. Lubbers (CDA) as prime minister.
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 13 » A month-long violent struggle begins in Aden, South Yemen between supporters of Ali Nasir Muhammad and Abdul Fattah Ismail, resulting in thousands of casualties.
January 19 » The first IBM PC computer virus is released into the wild. A boot sector virus dubbed (c)Brain, it was created by the Farooq Alvi Brothers in Lahore, Pakistan, reportedly to deter unauthorized copying of the software they had written.
January 25 » The National Resistance Movement topples the government of Tito Okello in Uganda.
March 4 » The Soviet Vega 1 begins returning images of Halley's Comet and the first images of its nucleus.
March 24 » The Loscoe gas explosion leads to new UK laws on landfill gas migration and gas protection on landfill sites.
October 10 » A 5.7 Mw San Salvador earthquake shakes El Salvador, killing 1,500.
When copying data from this family tree, please include a reference to the origin: Hendrik Dreyer, "Dreyer Tree", database, Genealogy Online (https://www.genealogieonline.nl/dreyer-tree/I12204.php : accessed February 2, 2026), "Emmarentia Hester Dreyer (1911-1986)".
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