Related by context. Frequent words. (Click for all words.) 51 Hawaiian Volcano Observatory 49 lava tubes 48 Pacific Ocean 48 volcanically active 48 Kilauea Volcano 47 Aleutian chain 47 Kilauea volcano 47 geologically active 47 Valles Marineris 46 volcanic crater 46 lava tube 45 Kilauea 45 lava 45 cliffs overlooking 44 lava flows 44 lavas 44 landmasses 44 lithosphere 43 hydrothermal vent 43 continental crust 43 magma chamber 43 polar caps 43 hydrothermal activity 43 caldera 43 icecap 43 Mauna Loa 43 seamount 42 coastal bluffs 42 Punta Arenas Chile 42 ocean 42 oceanic crust 42 magmas 42 Hurricane Felicia 42 Ross Ice Shelf 42 molten rock 42 El Nino warming 42 migrating whales 41 Oort Cloud 41 landforms 41 Weddell Sea 41 Cascadia subduction zone 41 magma 41 volcanic gases 41 explosive eruptions 41 dormant volcano 41 volcanism 41 Haumea 41 subduction 41 ITCZ 41 volcanic vents 41 equatorial Pacific 41 Kealakekua Bay 40 volcanic islands 40 Haleakala 40 lava flow 40 Ala Wai Canal 40 Cape Flattery 40 hot springs 40 Antarctica 40 Geological Hazard Mitigation 40 ridge 40 molten lava 40 crustal 40 volcanic rock 40 rugged coastline 39 methane hydrate 39 Saturn moon Enceladus 39 Arctic permafrost 39 Anatahan 39 Point Conception 39 pyroclastic flow 39 butter melts 39 basaltic 39 volcanoes 39 Cat Ba 39 volcano erupting 39 Admiralty Inlet 39 Volcanologists 39 sedimentary rock 39 methane hydrates 39 equatorial Pacific Ocean 39 Stillwater Cove 39 reef 39 landform 38 Alaska Mount Redoubt 38 volcanos 38 subduction zone 38 Hawaii Volcanoes National 38 Hokule'a 38 Volcano erupts 38 Oceanside Harbor 38 volcanic activity 38 Arctic Ocean 38 Alaska Aleutian Islands 38 Drake Passage 38 volcanic plume 38 hydrothermal vents 38 rocky outcroppings 38 icy crust 38 Turnagain Arm 37 Kuril Islands