Magnitude (earthquake) | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-15

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Seismic_magnitude_scales


00:00:38 1 Earthquake magnitude and ground-shaking intensity
00:02:27 2 Magnitude scales
00:03:52 2.1 "Richter" magnitude scale
00:06:02 2.2 Other "Local" magnitude scales
00:06:37 2.2.1 Japanese Meteorological Agency magnitude scale
00:06:52 2.3 Body-wave magnitude scales
00:07:12 2.3.1 mB scale
00:07:50 2.3.2 mb scale
00:09:01 2.3.3 mbsubLg/sub scale
00:10:22 2.4 Surface-wave magnitude scales
00:12:08 2.5 Moment magnitude and energy magnitude scales
00:14:18 2.6 Energy class (iK/i-class) scale
00:14:53 2.7 Tsunami magnitude scales
00:15:28 2.8 Duration and Coda magnitude scales
00:15:38 2.9 Macroseismic magnitude scales
00:16:50 2.10 Other magnitude scales
00:17:01 3 See also
00:17:57 4 Notes
00:19:59 5 Sources
00:21:50 6 External links
00:22:02 Notes
00:22:11 Sources
00:22:20 External links



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SUMMARY
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Seismic magnitude scales are used to describe the overall strength or "size" of an earthquake. These are distinguished from seismic intensity scales that categorize the intensity or severity of ground shaking (quaking) caused by an earthquake at a given location.  Magnitudes are usually determined from measurements of an earthquake's seismic waves as recorded on a seismogram.  Magnitude scales vary on what aspect of the seismic waves are measured and how they are measured. Different magnitude scales are necessary because of differences in earthquakes, the information available, and the purposes for which the magnitudes are used.