Related by context. Frequent words. (Click for all words.) 55 El Niños 54 Cascadia Subduction Zone 54 subduction 53 hydrothermal activity 53 Cascadia subduction zone 53 Volcanic eruptions 52 subduction zones 52 earthquakes 52 subduction zone 52 lithosphere 52 oceanic crust 51 quakes 51 igneous rocks 50 earth tremors 50 crustal 50 mud volcanoes 50 igneous rock 50 Tsunamis 49 continental crust 49 volcanism 49 tectonic 49 seamounts 48 geologically active 48 deformation 48 carbonate rocks 48 upwelling 48 temblors 47 tectonic plate 47 El Ninos 47 earthquake jolts 47 tsunamis 47 escarpments 47 landforms 47 hydrothermal alteration 47 seismicity 47 explosive eruptions 47 seismic activity 47 gyre 46 argillic alteration 46 clay alteration 46 La Nina phenomenon 46 landmasses 46 volcanic islands 46 tectonic plates collide 46 tectonics 46 marine sediments 46 brecciation 46 scarps 46 river deltas 46 waterspouts 46 lavas 45 volcanic gases 45 oxygen depletion 45 sinkings 45 tremblor 45 beaked whales 45 magma chamber 45 El Nino phenomenon 45 clasts 45 tidal surges 45 volcanic vents 45 porphyries 45 sedimentary basins 45 lava tubes 45 perturbations 45 lava flows 45 El Nino warming 44 outcroppings 44 Quake shakes 44 deformations 44 fluvial 44 bergs 44 extensional 44 Cosmic rays 44 mass strandings 44 sulphide minerals 44 currents 44 reefs 44 limestone caves 44 quakes measuring 44 earth crust 44 Anatolian fault 44 Sperm whales 44 rockfalls 44 seamount 44 talus 44 depressions 44 lava tube 44 gobies 44 longline fishing 44 hydrothermal vent 44 volcanic plume 44 downdrafts 44 Tsunami waves 44 surficial 44 rupture 43 undersea quake 43 striations 43 temperature gradient 43 magmas 43 igneous