Map showing the countries with institutions contributing to the European Gravitational Obsvervatory or the Virgo collaboration.
  Country with institutions contributing to EGO and the Virgo collaboration
  Country with institutions contributing to the Virgo collaboration
Own workSource for EGO members: https://www.ego-gw.it/about-our-mission/Source for virgo collaboration members: https://apps.virgo-gw.eu/vmd/public/institutions
Auguel