dormant, not currently erupting that has in the past and might erupt again, active, currently corrupting or showing signs of eruption in the future, seismology , the study of earthquakes and seismic waves, seismoscope, also called a seismometer gives info about an earthquake, seismogram/seismograph, a machine that record info on a seismogram, epicenter, directly above hypocenter, hypocenter, where the earthquake originates, triangulation, relocations used to determine the epicenter, body waves, seismic waves that move through the interior of earth, S waves, secondary waves cannot travel through liquid, P waves, primary waves arrive first, Rayleigh waves, waves that roll on the ground in a complex motion, love waves, waves that move in an entirely horizontal motion, shadow zone, an area of earth that is not impacted by seismic waves, faults, cracks formed by tectonic plate movement generally where earthquakes or originate, intensity, strength of shaking, magnitude, energy of earthquake, mercalli scale, measures intensity from one to 12, Richter scale, measures earthquake amplitude, oceanic crust, thinner points on earth crust directly below ocean, continental crust, portions of crust hot at bottom of oceans, Lithosphere, made up crust and upper most mantle ends at Mojo discontinuity, mohorovicic discontinuity, where the lithosphere meets top of mantle, upper mantle, starts at Mojo discontinuity solid liquid state, asthenosphere, area directly below lithosphere, transition zone, area that has characteristics of both layers, lower mantle, surrounds core has D” and Guttenberg discontinuity, mesosphere, uppermost portions of lower mantle, D”, a thin layer between lower mantle and upper core, Guttenberg discontinuity, boundary between lower mantle and outer core.

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