# Seismic Energy Calculator

## Converts magnitude of seismic energy between Joule and TNT explosive equivalent.

 Magnitude Energy Magnitude Energy J kJ (×10^3J) MJ (×10^6J) GJ (×10^9J) TJ (×10^12J) PJ (×10^15J) EJ (×10^18J)
 Magnitude earthquake has several types, and currently the moment magnitude is mainly used.This calculator uses the moment magnitude.The Magnitude increases +2, energy increases 1000 times.1J = 1N*m1TNT-ton=4.184GJ$\normal Magnitude\\\hspace{20} log_{10}J=4.8+1.5M\\\hspace{100}M:Magnitude,\ J:Jule\\$
Seismic Energy
 [1-3] /3 Disp-Num5103050100200
[1]  2017/09/20 14:18   Male / 60 years old level or over / An engineer / Very /
Purpose of use
Research for a seismic model.
Comment/Request
Thank you for updating the equations!
I experienced 2 of the quakes in your list above.
[2]  2017/09/08 14:04   Male / 60 years old level or over / An engineer / Useful /
Purpose of use
Converting magnitude into energy for a seismic model.
Comment/Request
It would be helpful if you provided several versions of the equation. For example, one for solving for M, another for solving for J. The equation that is given has both terms but neither is isolated. Rearranging is relatively simple algebraic rules but I need to program it into a spreadsheet. Can you make it a little easier for us?
from Keisan
We have fixed it to be able to select "Magnitude" or "Energy".

From the above equations,
the followings are obtained.

J = 10^(4.8+1.5M)
M = (log(J) - 4.8)/1.5
[3]  2015/05/13 23:01   Male / Under 20 years old / High-school/ University/ Grad student / Useful /
Purpose of use
Math project

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