Ocean Ranger sank
Ocean Ranger was a semi-submersible mobile offshore drilling unit that sank in Canadian waters on 15 February 1982. It was drilling an exploration well on the Grand Banks of Newfoundland, 267 kilometres (166 mi) east of St. John's, Newfoundland, for Mobil Oil of Canada, Ltd. (MOCAN) with 84 crew members on board when it sank. There were no survivors.
Hamburg U-Bahn opened
The Hamburg U-Bahn is a rapid transit system serving the cities of Hamburg, Norderstedt, and Ahrensburg in Germany. Although referred to by the term U-Bahn (the "U" commonly being understood as standing for Untergrund "underground"), most of the system's track length is above ground. The network is interconnected with the city's S-Bahn system, which also has underground sections. It comprises four lines serving 93 stations, with a route length of 106.4 kilometres (66.1 mi) in 2019.
Gregor von Helmersen died
Gregor von Helmersen or Grigory Petrovich Helmersen was a Baltic German geologist. In 1835 he was put in the Corps of Mining Engineers and in 1838 he became professor of geology in the Mining Institute at Saint Petersburg of which he was also director. In 1839, along with Karl Ernst von Baer, he founded the first serial natural scientific publication in Russia known as Beitrage zur Kenntniss des Russischen Reiches. In 1850, he became an academician of the Russian Academy of Sciences in St Petersburg. He founded and became the first head of the Russian Geological Committee in 1882.
Helsinki Cathedral inaugurated
Helsinki Cathedral is the Finnish Evangelical Lutheran cathedral of the Diocese of Helsinki, located in the neighborhood of Kruununhaka in the centre of Helsinki, Finland, at the Senate Square. The church was originally built from 1830 to 1852 as a tribute to the Grand Duke of Finland, Tsar Nicholas I of Russia. It was also known as St Nicholas's Church until the independence of Finland in 1917. It is a major landmark of the city, and possibly the most famous structure in Finland as a whole when viewed globally.
