Based on the section "energy equivalent" in the Wikipedia article on "Richter scale", it would seem that this is approximately 600 TJ (terajoule).
A magnitude 8 earthquake is 10 times stronger than a magnitude 7 earthquake in terms of energy released. The shaking and potential damage caused by a magnitude 8 earthquake would be significantly greater than that of a magnitude 7 earthquake.
An earthquake's magnitude is measured on a logarithmic scale, where each whole number increase represents a tenfold increase in amplitude of the seismic waves. Thus, a magnitude 7 earthquake has approximately 1,000 times more energy release than a magnitude 4 earthquake (since 7-4 = 3, and 10^3 = 1,000). Therefore, a magnitude 7 earthquake has significantly more motion and energy than a magnitude 4 earthquake.
Seismic energy increases by a factor of about 31.6 for each increase of magnitude, so a magnitude 3 earthquake has 31.6 times more energy released than a magnitude 2 earthquake.
Each increase by one magnitude corresponds to a release of energy 31.6 times that released by the lesser earthquake.Since 7 is 3 magnitudes higher than 4, the magnitude 4 earthquake has roughly 1/31554th the energy of the magnitude 7.Each increase by one magnitude corresponds to a release of shaking amplitude 10 times that released by the lesser earthquake.Since 7 is 3 magnitudes higher than 4, the magnitude 4 earthquake has 1/1000th the shaking amplitude of the magnitude 7.The amount of energy changes much more rapidly with magnitude than the amount of shaking amplitude. This is a commonly made error.
The earthquake magnitude scale, such as the Richter scale or the moment magnitude scale, is logarithmic, meaning each whole number increase corresponds to a tenfold increase in amplitude and approximately 32 times more energy released. This means that a magnitude 7 earthquake releases roughly 32 times more energy than a magnitude 6 earthquake.
The measure of energy released by an earthquake depends on its magnitude. If its a high magnitude earthquake, there is a lot of energy. If there is a low magnitude, then there is little energy.
An earthquake's magnitude is a measure of how strong it is
Roughly 32 times more energy is released in a Magnitude 6 earthquake than in a Mag.5 quake.
The energy output of a magnitude 6 earthquake is approximately 32 times greater than that of a magnitude 5 earthquake. Magnitude scales such as the Richter scale are logarithmic, so each whole number increase represents a tenfold increase in amplitude and approximately 32 times more energy release.
An earthquake with a magnitude of 5.0 has a shaking amplitude 10 times that of an earthquake with a 4.0 magnitude.
The magnitude of an earthquake is caluated to measure the amount of energy released during the earthquake.
A magnitude 6 earthquake emits roughly 31 times more energy than a magnitude 5 earthquake. The magnitude 6 quake will also have a maximum seismic wave amplitude of ten times the magnitude 5 earthquake.