Related by context. Frequent words. (Click for all words.) 58 sinkhole 55 Sinkhole 55 mud volcano 55 Jupiter moon Io 55 prompts evacuations 55 Martian crater 55 Seepage 55 SoCal wildfire 54 Shiveluch 53 Lava flows 53 pyroclastic flow 53 Firefighters hosed 53 Manhole covers 52 Volcano erupts 52 creek overflowed 52 Antarctic glacier 52 Tropical Storm Olga 52 Neutron stars 52 Galeras volcano 52 bee swarm 52 Dense smoke 51 Indonesian volcano erupts 51 Toxic fumes 51 Cagsawa 51 Uprooted trees 51 Tidal waves 51 tropical storm Agatha 51 sinkhole swallowed 51 sonar scanner 51 Pu'u O'o 51 Train derailment 51 Ground penetrating radar 51 sinkholes 50 corroded pipe 50 Decomposed body 50 Suspected burglar 50 Manholes 50 penetrating radar 50 gulleys 50 Prado Dam 50 Tropical Storm Agatha 50 permafrost thaws 50 Greenland glacier 50 acrid black 50 Kilauea summit 50 Merapi volcano 50 Highly radioactive 50 limestone bedrock 50 Hurricane Ike roared 50 lava flowing 50 Gusev crater 50 mineshafts 50 Lake Vostok 50 GJ #b [001] 49 earthen barrier 49 Ammonia leak 49 polar craters 49 Missing hiker 49 SoCal freeway 49 Seafloor 49 Overturned truck 49 crater 49 volcanic craters 49 Lake Nyos 49 Faulty wiring 49 Charred bodies 49 Glass shards 49 permafrost melts 49 Smoke inhalation 49 gaseous planet 49 noxious smell 49 Toxic algae 49 Nares Strait 49 lava tube 49 needlelike 49 Drifting snow 49 Augustine Volcano 49 Siberian permafrost 49 welding sparks 49 polar vortex 49 drainage culvert 48 refroze 48 Zaccard 48 Sewage spill 48 Nutty Putty cave 48 inky blackness 48 watermain break 48 dense brush 48 Sewage spills 48 volcanic lava 48 lava tubes 48 Opportunity rover 48 flue pipe 48 permanently shadowed crater 48 HiRISE images 48 Pacaya volcano 48 #ft #m [001] 48 Crane collapses 48 undersea volcano 48 Strong quake jolts 48 Alleged burglar