The Moment Magnitude Scale (Mw)
- Created by: Basital
- Created on: 20-09-17 14:34
View mindmap
- The Moment Magnitude Scale (Mw)
- Introduced in 1979 by Hanks and Kanamori
- Most commonly used method of describing the size of a microseism
- Microseism: A faint earth tremor caused by natural phenomena, such as winds and strong ocean waves.
- Measures the size of events in terms of how much energy is released
- The amount of movement by rock and the area of the fault or fracture surface
- (i.e. the distance of movement along a fault or fracture)
- Calculated values can be easily compared to magnitude values for other events
- More accurate scale for describing the size of events
- an increase of one unit of magnitude on a magnitude scale is equivalent to an increase of 10 times the amplitude recorded by a seismograph and approximately 30 times the energy.
Comments
No comments have yet been made