Related by context. Frequent words. (Click for all words.) 57 pyroclastic 55 pyroclastic flow 55 lava 51 Augustine Volcano 51 volcanic 51 Alaska Mount Redoubt 51 molten rock 50 polar vortex 50 basalt rock 50 fumaroles 50 basaltic 49 andesitic 49 Kilauea volcano 49 meteoroids 49 volcanic gases 49 hardened lava 49 lithosphere 49 tropopause 48 comet tail 48 Gusev crater 48 spewed ash 48 hydrothermal fluids 48 lava flows 48 lahars 48 mud volcanoes 48 volcanic peaks 48 meteoroid 48 PHIVOLCS 48 volcanic tremors 47 Bulusan 47 caldera 47 volcanic quakes 47 volcano 47 extinct volcanoes 47 Mount Asama 47 magma 47 ejecta 47 volcanic tremor 47 Kilauea Volcano 47 volcanic plume 47 Mount Bromo 47 Saturn moon Enceladus 47 erupting volcanoes 47 lava flowing 46 molten lava 46 coronal hole 46 biogeochemical 46 exosphere 46 spewing lava 46 basalt 46 spew ash 46 Valles Marineris 46 volcanic activity 46 Russia Kamchatka Peninsula 46 eruptive 46 magma chamber 46 erosional 46 lava flow 45 Eyjafjallajökull volcano 45 dacite 45 Geological Survey Hawaiian Volcano 45 loess 45 Taal Volcano 45 Mount Mayon 45 Anatahan 45 lunar crater 45 ash plumes 45 vuggy silica 45 undersea volcanoes 45 Mount Ruapehu 45 Mount Redoubt 45 Volcanologists 45 supervolcano 45 explosive eruptions 45 volcanoes 45 Volcanic 45 Vulcanologists 44 Indonesia Mount Merapi 44 fragments 44 deep gorges 44 Chaiten volcano 44 underwater volcanoes 44 clasts 44 icy crust 44 Eyjafjallajökull 44 Mount Kelud 44 InSAR 44 crater 44 lava tube 44 Meteor Shower 44 pyroclastic flows 44 magmas 44 Volcano erupts 44 Lassen Peak 43 Pinatubo 43 Tungurahua volcano 43 hollow tubes 43 quartz monzonite 43 rocks 43 igneous rock 43 clathrates