page_title: NORSAR
section_title: Description
hierarchical_section_title: NORSAR / Description
caption_attribution_description: English: ARPANET logical map circa 1977
context_page_description: NORSAR or Norwegian Seismic Array was established in 1968 as part of the Norwegian-US agreement for the detection of earthquakes and nuclear explosions.
context_section_description: 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. NORSAR conducts basic seismological research, develops software and provides consultancy for the petroleum industry.
  NORSAR was the first non-US site included in ARPANET in June 1973 with a connection via the Tanum Earth Station in Sweden to the Seismic Data Analysis Center (SDAC) in Virginia, United States.  It was the connection point for ARPANET to spread to Peter Kirstein's  research group at University College London (UCL) the following month in July 1973. Connecting through NROSAR, the Norwegian Defence Research Establishment, along with UCL and RSRE in Britain, were involved in testing TCP/IP. UCL provided a gateway between UK academic computer networks and the ARPANET via NORSAR.
  Since 1999, NORSAR has been an independent research foundation.
caption: ARPANET logical map, 1977. NORSAR is located at lower right.
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