Rocscience Inc.'s Technical Workshop: Finite Element Modelling of Underground Excavations begins on Aug 26th 2026
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On This Day | January 20

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1985
São Paulo/Guarulhos International Airport opened

São Paulo/Guarulhos International Airport is the primary international airport serving São Paulo. It is popularly known locally as either Cumbica Airport, after the district where it is located and the Brazilian Air Force base that exists at the airport complex, or Guarulhos Airport, after the municipality of Guarulhos, in the state of São Paulo, where it is located. Since November 28, 2001, the airport has been named after André Franco Montoro (1916-1999), former Governor of São Paulo state. The airport was rebranded as GRU Airport in 2012. The airport was the busiest in Brazil in terms of transported passengers, aircraft operations, and cargo handled in 2012, placing it as the second busiest airport in Latin America by passenger traffic (36,596,326 in 2016).

1812
Thomas Meik was born

Thomas Meik was a 19th-century Scottish engineer. He is particularly associated with ports and railways in Scotland and northern England. In 1845, at the age of 33, Meik was appointed engineer to the River Wear Commission (responsible for maritime works around Sunderland). In 1859, the commission took over the construction of the Hendon Dock on the south side of the Wear, and Meik was responsible for the entire works (the task included a grain warehouse and a lighthouse - which, although relocated when the South Pier was shortened in 1983, still stands today). Meik fathered two prominent engineering sons: Patrick Meik and Charles Meik. The firm they founded remains active, today part of the Jacobs Engineering Group.

1809
First US geological map published

William Maclure made the earliest attempt at a geological map of the United States of America. In 1807 Maclure commenced the self-imposed task of making a geological survey of the United States. Almost every state in the Union was traversed and mapped by him, the Allegheny Mountains being crossed and recrossed some 50 times. The results of his unaided labours were submitted to the American Philosophical Society in a memoir entitled Observations on the Geology of the United States explanatory of a Geological Map, and published in the Society's Transactions, together with the first geological map of that country, Maclure's 1809 Geological Map.

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