Related by context. Frequent words. (Click for all words.) 72 volcanic activity 69 volcanoes 69 eruptions 69 volcanic eruption 66 volcanic 62 volcanism 62 eruption 61 lava flows 59 volcano 58 volcano eruption 57 solar flares 56 plate tectonics 55 volcanos 53 active volcanoes 53 tectonic 53 lava flow 53 volcanic ash 52 aerosols 52 sunspots 52 comets 52 earthquakes 52 Volcanic 52 glaciers 51 lava 51 earth crust 51 ash clouds 51 Eyjafjallajokull 50 Earth crust 49 mass extinction 49 asteroids 49 asteroid 48 Merapi 48 quakes 48 magma 48 El NiƱo 48 water vapor 48 molten rock 48 comet 47 cosmic rays 47 vortices 47 Little Ice Age 47 hydrothermal 47 volcano erupted 47 caldera 46 Iceland volcano 46 seismic activity 46 supernovae 46 ash plume 46 tsunamis 46 Saturn rings 46 erupting volcano 46 ocean currents 46 permafrost 46 El Nino 46 neutron star 46 ash cloud 45 equatorial 45 geologic 45 coral bleaching 45 jet stream 45 Geophysical Research 45 Tsunamis 45 Volcanic ash 44 Enceladus 44 atmospheric carbon dioxide 44 craters 44 upwelling 44 plumes 44 magnetic fields 44 plume 44 basalt 44 atmospheric 44 galaxy clusters 44 sunspot 44 gamma ray burst 44 landslides 44 corona 44 Martian atmosphere 44 meteors 44 crater 44 heatwaves 44 storms 44 meteorites 43 magnetosphere 43 gamma ray bursts 43 Volcanology 43 sediments 43 extinctions 43 volcanic rock 43 Icelandic volcano 43 nebula 43 melting glaciers 43 glacier 43 meteor shower 43 Kilauea 43 anthropogenic 43 geysers 43 cyclones 43 manmade 43 supernova 43 forest fires