Related by context. Frequent words. (Click for all words.) 58 seismologist 52 volcano 52 geophysicist 51 Volcanology 50 climatologist 50 geologist 49 astronomer 49 volcanic activity 48 lava dome 48 seismologists 48 biologist 46 hydrologist 46 astrophysicist 46 wildlife biologist 46 marine biologist 45 seismic activity 45 eruption 44 archaeologist 44 scientist 44 ash plume 44 Merapi 44 fisheries biologist 44 Geological Survey 44 epidemiologist 43 entomologist 43 meteorology 43 meteorologist 43 forecaster 43 geographer 42 ecologist 42 USGS 42 volcanoes 42 archeologist 42 observatory 42 Mayon 42 Geologist 42 zoologist 41 oceanographer 41 botanist 41 lava 41 volcanos 40 active volcanoes 40 virologist 40 ornithologist 40 volcanic eruption 40 Japan Meteorological Agency 39 Archaeologist 39 eruptions 39 magma 39 physicist 39 geosciences 39 paleontologist 39 forester 39 economist 39 Geophysics 38 weather forecaster 38 Biologist 38 naturalist 38 Astrophysics 38 researcher 38 astronomers 38 Observatory 38 conservationist 38 Woods Hole Oceanographic 38 Geologists 37 historian 37 Astronomy 37 demographer 37 aurora 37 lava flows 37 principal investigator 37 postdoctoral researcher 37 Meteorological 37 meteorological 37 Meteorologist 37 volcanic eruptions 37 Geological Survey USGS 36 avalanche danger 36 glacier 36 geophysics 36 toxicologist 36 anthropologist 36 Mount Merapi 36 postdoctoral fellow 36 curator 36 astronomy 36 volcanic 36 doctoral student 35 Seismologists 35 Meteorology 35 crater 35 mountaineer 35 observatories 35 criminologist 35 geologists 35 plume 35 NASA Goddard Space 35 geneticist 34 microbiologist 34 horticulturist 34 Harvard Smithsonian