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ARPANET logical map, 1977. NORSAR is located at lower right.

NORSAR or Norwegian Seismic Array was established in 1968 as part of the Norwegian-US agreement for the detection of earthquakes and nuclear explosions.[1][2][3] NORSAR was the first non-US site included in ARPANET in 1973.[4] It was also a connection point for ARPANET to spread to England, and then to the rest of Europe. Since 1999, NORSAR has been an independent research foundation.[5]

Located at Kjeller, north of Oslo, NORSAR runs and maintains seismic arrays in Norway and it is the designated Norwegian National Data Centre for the Comprehensive Nuclear Test Ban Treaty.[6] NORSAR conducts basic seismological research, develops software and provides consultancy for the petroleum industry.[7]


  1. ^ About us,
  2. ^ NORSAR History
  3. ^ Novak, Matt (1 February 2016). "The Secret Project To Turn The Internet Into An Anti-Soviet Spy Network". Retrieved 21 July 2017.
  4. ^ "ARPANET Maps 1969 to 1977". Retrieved 17 May 2012.
  5. ^ "About us". Retrieved 21 July 2017.
  6. ^ Marks, Paul (9 September 2014). "Spidery forest gadgets catch secret nuclear blasts". New Scientist.
  7. ^ "R & D". Retrieved 21 July 2017.

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