Related by context. Frequent words. (Click for all words.) 59 volcanologist 59 volcano 58 seismologists 58 volcanoes 57 Volcanology 57 volcanic activity 55 active volcanoes 53 eruption 52 Merapi 51 volcanos 51 seismic activity 50 meteorologists 49 Seismologists 49 geologists 48 eruptions 48 lava dome 48 volcano erupted 47 Geologists 47 volcanic 47 Mayon 47 seismology 46 astronomers 46 volcanic eruption 46 Surono 45 lava flows 45 volcanic eruptions 45 ash plume 45 Eyjafjallajokull 44 Seismology 44 Mount Merapi 44 paleontologists 44 seismological 43 seismologist 43 scientists 43 climatologists 42 hydrologists 42 observatory 42 lava 42 Japan Meteorological Agency 42 quakes 41 magma 41 caldera 41 forecasters 41 epidemiologists 41 glacier 41 ornithologists 40 lava flow 40 biologists 40 archeologists 40 archaeologists 40 volcano eruption 40 climbers 40 erupting volcano 40 Meteorological Agency 40 earthquakes 40 mountaineers 39 meteorology 39 weathermen 39 observatories 39 #.# magnitude tremor 39 glaciers 39 meteorological 38 Yogyakarta 38 St. Helens 38 marine biologists 38 Volcano 38 botanists 38 physicists 38 Meteorologists 38 mountain climbers 38 crater 38 Astronomical Services 37 Kilauea 37 Astronomers 37 volcanic ash 37 astrophysicists 37 Geological Survey 37 tallest mountain 37 temblors 37 researchers 37 Meteorological 36 ash clouds 36 geological 36 Ellesmere Island 36 anthropologists 36 tsunamis 36 Scientists 36 avalanches 36 solar flares 36 Geosciences 36 climatologist 36 geology 36 PAGASA 36 geologist 36 seafloor 36 Meteorology 36 astronomer 36 ecologists 36 USGS 36 aurora 35 #.# magnitude earthquake