Severnaya Zemlya north from Siberia. The climate data below, taken from the Golomyanniy Meteorological Station gives an indication of the weather experienced in the archipelago. Severnaya Zemlya is a polar desert with sparse vegetation and permafrost at less than . Rare vascular plants include species of "Cerastium" and "Saxifraga". Non-vascular plants include the moss genera "Detrichum", "Dicranum", "Pogonatum", "Sanionia", "Bryum", "Orthothecium" and "Tortula", as well as the lichen genera "Cetraria", "Thamnolia", "Cornicularia", "Lecidea", "Ochrolechia" and "Parmelia". Common flowering plants of the high Arctic such as the purple saxifrage ("Saxifraga oppositifolia") and the Arctic poppy ("Papaver radicatum") also occur on Severnaya Zemlya. According
Novaya Zemlya Novaya Zemlya. The launch rocket was subsequently deployed to Cuba. 1963 saw the implementation of the Limited Test Ban Treaty which banned most atmospheric nuclear tests. The largest underground test in Novaya Zemlya took place on September 12, 1973, involving four nuclear devices of 4.2 megatons total yield. Although far smaller in blast power than the Tsar Bomba and other atmospheric tests, the confinement of the blasts underground led to pressures rivaling natural earthquakes. In the case of the September 12, 1973, test, a seismic magnitude of 6.97 on the Richter Scale was reached, setting off an 80 million ton