Related by context. Frequent words. (Click for all words.) 51 magma 47 Sulfur dioxide 47 molten rock 46 volcanic gases 46 Kilauea volcano 45 lithosphere 45 volcano 45 lava 45 water vapor 45 volcanism 44 volcanic 44 lava dome 44 volcanic activity 44 melting permafrost 43 methane 43 volcanoes 43 icecap 43 Tungurahua 42 methane gas 42 gases 42 noxious gases 42 Alaska Mount Redoubt 42 pyroclastic flows 41 overpressure 41 temperature gradient 41 X ray emission 41 lava flow 41 eruption 41 ocean acidity 41 Indonesia Mount Merapi 41 vapor 41 lava flows 41 meteoroids 41 species extinctions 40 radioactive decay 40 gasses 40 ash spewed 40 superheated 40 volcanic plume 40 seismic activity 40 caldera 40 naturally occurring methane 40 subduction zone 40 cosmic radiation 40 seismicity 40 volcanic rock 40 sulfur dioxide 40 Eruptions 39 gases emitted 39 dormant volcano 39 extinct volcano 39 mudflows 39 magmatic 39 accretion disk 39 cosmic rays 39 meteoroid 39 methane hydrates 38 soot particles 38 volcanic eruptions 38 spewed ash 38 permafrost 38 Mount Kelud 38 eruptions 38 volcano erupting 38 subduction 38 aerosol particles 38 ionized gas 38 neutron star 38 upwelling 38 volcanos 38 volcanic eruption 37 odorless colorless gas 37 Bulusan 37 vents 37 volcano erupts 37 cosmic ray 37 crustal 37 active volcanoes 37 particulates 37 rockfalls 37 incomplete combustion 37 glacial lakes 37 liquid droplets 37 silicate 37 Earth crust 37 magnetosphere 37 geologically active 36 carbon dioxide 36 Tibetan Plateau 36 toxic gases 36 volcano eruption 36 volcano crater 36 nucleation 36 magnetar 36 degassing 36 Andes mountains 36 Mount Sinabung 36 lava rocks 36 flue gases 36 Eta Carinae 36 volcanic debris