GEOG 1350 Lecture Notes - Lecture 2: Mercalli Intensity Scale, Aseismic Creep, Richter Magnitude Scale
26 Oct 2016
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Document Summary
The result from the rupture of rocks along a fault. Energy from an earthquake is released in the form of seismic waves. They are mapped according to the epicentre; the focus is located directly below the epicentre. Magnitude of an earthquake is expressed as a number to one decimal place. This type of measurement was first developed by richter in 1935. The richter scale was a measure of the strength of a wave at a distance of. The amount of mvmt along the fault. Elasticity of the crust at the focus (how strong the crust is) Similar to richter scale, it is a logarithmic scale. An m7 earthquake represents 10 times the amount of ground motion as an m6 earthquake (m5 to m8 = 1000x stronger, Except for very large earthquakes, the magnitude on the mms is similar to the richter scale. The strongest earthquake to ever occur is m9. 5 in chile in 1960.
