The moment magnitude scale was first published in an academic paper in The Journal of Geophysical Research in 1979.A
This paper is freely available online and can be read in PDF format by clicking on the related link.
AHanks, T. C & Kanamori, H. (1979). A Moment Magnitude Scale. Journal of Geophysical Research, Vol. 84, No. B5, pp. 2348-2350.
There are a number of earthquake magnitude scales, including the moment magnitude scale (the scale currently favoured by seismologists), the Richter or local magnitude scale and the surface wave magnitude scale.
Magnitude of the 2011 Japan earthquake on moment magnitude scale is 9.0.The use of the Richter magnitude scale has largely been replaced by the moment magnitude scale in most countries. The United States Geological Survey (USGS), for example, uses the moment magnitude scale designated as MMS or Mw to measure all large earthquakes.UPDATE: Official magnitude was updated to 9.1 on Nov 7, 2016.
The moment magnitude scale is more accurate for large earthquake than can cause damage.
The moment magnitude scale (MW) provides an estimate of the total energy released in an earthquake and is currently the preferred magnitude scale in use by seismologists for measuring large (magnitude greater than 7) earthquakes.
the moment magnitude scale rates an earthquake by estimating the total energy released during an earthquake
There are a number of earthquake magnitude scales, including the moment magnitude scale (the scale currently favoured by seismologists), the Richter or local magnitude scale and the surface wave magnitude scale.
The Richter scale
7.0 on the Moment Magnitude Scale.
Magnitude of the 2011 Japan earthquake on moment magnitude scale is 9.0.The use of the Richter magnitude scale has largely been replaced by the moment magnitude scale in most countries. The United States Geological Survey (USGS), for example, uses the moment magnitude scale designated as MMS or Mw to measure all large earthquakes.UPDATE: Official magnitude was updated to 9.1 on Nov 7, 2016.
The moment magnitude scale is more accurate for large earthquake than can cause damage.
A magnitude scale. Formerly the Richter magnitude scale was used, but this has now been replaced by the Moment magnitude scale.
A magnitude scale. Formerly the Richter magnitude scale was used, but this has now been replaced by the Moment magnitude scale.
Moment Magnitude, Ritcher Scale and Mercili Scale.
The moment magnitude scale (MW) provides an estimate of the total energy released in an earthquake and is currently the preferred magnitude scale in use by seismologists for measuring large (magnitude greater than 7) earthquakes.
They use the Richter scale to measure magnitude and Moment Measure to measure energy released.
The Moment Magnitude scale.
the moment magnitude scale rates an earthquake by estimating the total energy released during an earthquake