Related by context. Frequent words. (Click for all words.) 57 spewed ash 54 plumes 53 plume 51 billowing cloud 51 ash spewed 50 smoke plumes 50 volcano erupting 50 spewing ash 50 spewing lava 49 Thick clouds 49 lunar dust 48 Volcano erupts 48 Saturn moon Enceladus 48 volcanic plume 48 Grimsvotn 47 ash spewing 47 Alaska Mount Redoubt 47 explosive eruptions 47 pyroclastic flow 46 billowing clouds 46 volcanic tremors 45 lava flows 45 searing ash 45 Opportunity rover 45 Eyjafjallajokull volcano 45 Grimsvotn volcano 45 moon Titan 44 thick plume 44 lahars 44 Kelud 44 volcanic gases 44 ash plumes 44 mudflows 44 ashfall 44 eruption 44 tiny specks 43 volcanic debris 43 Moderate Resolution 43 ash plume 43 volcano erupts 43 butter melts 43 pyroclastic flows 43 wispy clouds 43 molten lava 43 aerosol particles 43 Gamma ray bursts 42 underwater plume 42 Indonesian volcano erupts 42 Patchy fog 42 sheens 42 crater 42 ash 42 martian soil 42 Kilauea Volcano 42 dust devils 42 planet orbiting 41 darkened skies 41 Saturn moons 41 rocky planets 41 rover Opportunity 41 greenish yellow 41 Saturn moon 41 vog 41 meteoroids 41 volcanic 41 ionize 41 terabecquerels 41 Plumes 41 Colaprete 41 Leonid meteor shower 41 waterspouts 41 acrid smoke 41 lava 41 steam vents 41 arsenic mercury 41 Explosions shook 41 active volcanos 41 Mount Merapi volcano 41 Northerly winds 41 spectacular sunsets 41 MODIS 41 craters 41 Meridiani 41 volcanic crater 41 Dai ichi nuclear 40 oily sheen 40 strongest aftershock 40 Iceland Eyjafjallajokull volcano 40 eruptions 40 geologically active 40 volcanic eruption 40 fine particulates 40 puffy clouds 40 Mars rover Opportunity 40 particulates 40 comet dust 40 aftershocks shook 40 Snow flurries 40 acrid smell 40 sulphates 40 lightning flashes