Earthquakes

thumb|upright=1.35|Earthquake epicenters occur mostly along tectonic plate boundaries, especially on the Pacific [[Ring of Fire.]]

branch of seismology

series of localized seismic events within a short time period

earthquake

collaboration of the U.S. Geological Survey (USGS) and regional, state, and academic partners

a branch of seismology concerned with the probabilistic assessment of earthquake seismic hazard

unsubstantiated theory about how to survive a major earthquake

thumb|Seismites in the Upper Ordovician of northern Kentucky. thumb|Seismite in Holocene sediments of the Dead Sea basin, Israel. thumb|Seismite in the Borden Formation, Ohio, demonstrating "flow rolls".

Boundary between Earth's core and mantle