The magnitude of an earthquake is measured with a seismograph and the readout is measured using the Richter scale - See Sources and related links for more information.
The highest intensity rating is 12 on the Modified Mercalli scale. There is no upper limit for magnitude scales (such as the Moment and Richter magnitude scales) although in practical terms no earthquake larger than magnitude 9.5 has ever been recorded by humans.
The January 12, 2010 earthquake measured 7.0 Mw on the moment magnatude scale.
The most recent large earthquake of magnitude 9.0 or larger was a 9.0 magnitude earthquake in Japan in 2011 (as of March 2011), and it was the largest earthquake since records began. No, it wasn't. The largest earthquake ever recorded was the Chilean earthquake on May 20th, 1960. It measured 9.5 magnitude on the Richter's scale.
The term for the instrument that measures the seismic waves of earthquakes along faults or tectonic plates is known as a seismograph. These machines measure the force given off by the trembling of the ground due to the force of an earthquake. The strength is measured as magnitude on the "Richter scale" which is a logarithmic quantity. For example, the motion generated by a quake of magnitude 5 on the Richter scale is 10 times as large as that generated by a quake of magnitude 4.
Earthquake magnitude is measured using a number of differing scales including the Richter scale, the moment magnitude scale and the surface magnitude scale. Intensity is measured using he Modified Mercalli intensity scale.
The strongest earthquake that can be measured using the Richter magnitude scale is one with a magnitude of 8.0. For earthquakes larger than this, the moment magnitude scale must be used.
Atomic bombs have a magnitude of force measured in Kilotons.
Newtons
Magnitude
Rickter Scale
Newtons
They are measured on the Richter Scale, if you are talking about the magnitude
a magnitude of 7.0
Richter scale measures the magnitude of earthquakes.
This is known as magnitude. It is measured on the moment magnitude scale.
Constellations aren't measured in magnitude. Stars are - and every star has a different magnitude.