Related by context. Frequent words. (Click for all words.) 69 tectonic plate 62 subduction zone 59 subduction 56 tectonic plates 54 tectonic 54 crustal 53 lithosphere 53 continental crust 52 tectonic plates collide 51 tectonics 50 earth crust 49 Earth crust 49 continental plates 49 subduction zones 48 Cascadia subduction zone 48 oceanic crust 47 Plate 45 Anatolian fault 44 faultline 44 plate tectonics 43 seismic activity 43 San Andreas Fault 43 deformation 43 Moderate quake 42 magmatic 42 Cascadia Subduction Zone 42 caldera 42 earthquake jolts 42 seismically active regions 42 oceanic 41 Tibetan Plateau 41 M#.# 41 Volcanic 41 Fault Zone 41 carbonate rocks 40 basalt 40 monsoon trough 40 volcanic activity 40 extensional 40 NW trending 40 Seismological 40 Juan de Fuca 40 Anatahan 40 Earthquake shakes 40 breccia pipe 40 volcanic rock 39 seamount 39 magma 39 continental drift 39 basalts 39 volcanic 39 landmasses 39 volcanism 39 plate 38 igneous rocks 38 ductile 38 clasts 38 graben 38 Pacific Ocean 38 lavas 38 mud volcanoes 38 crust 38 volcanoes 38 outer crust 38 Volcanologists 38 seismic waves 38 basaltic 38 temperature gradient 38 ocean ridges 38 Kilauea Volcano 38 deforming 37 Richter scale rocked 37 quake rattles 37 thick slabs 37 pyroclastic flow 37 geologically active 37 seismographic 37 igneous rock 37 limestones 37 polar vortex 37 glacial melting 37 lava flow 37 molten rock 36 plates 36 seismically active 36 earth tremors 36 Pacific Rim 36 gneiss 36 hydrothermal activity 36 Volcanic eruptions 36 seabed 36 tsunamis 36 quakes 36 magma chamber 36 lava flows 36 Tsunamis 36 anisotropy 35 Mesozoic 35 geophysicists 35 Geologic 35 Antarctic peninsula