NOA (National Observatory of Athens) is the Greek National Tsunami Warning Centre (NTWC) acting as Tsunami Watch Provider (TWP) for the NEAM region
Founded in 1842 is the oldest research foundation in Greece. It is made of three institutes, the Institute for Astronomy, Astrophysics, Space application adn Remote Sensing, the Institute for Environmental Research and Sustainable Development, and the Institute of Geodynamics. This last one is in charge of the NEAMTWS NTWC and TWP.
For more information visit the Institute of Geodynamics webpage