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Seafloor spreading is a process that occurs at midocean ridges, where new
oceanic crust is formed through volcanic activity and then gradually moves away
from the ridge. Seafloor spreading helps explain continental drift in the theory of
plate tectonics.
Earlier theories (e.g. by Alfred Wegener and Alexander du Toit) of…

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An earthquake (also known as a quake, tremor or temblor) is the result of a
sudden release of energy in the Earth's crust that creates seismic waves. The
seismicity, seismism or seismic activity of an area refers to the frequency, type
and size of earthquakes experienced over a period of…

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