Seismic Energy Calculator

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

Seismic Energy

Seismic Energy
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*m

    Seismic Energy
    [1-7] /7Disp-Num
    [1]  2022/02/20 02:13   60 years old level or over / A teacher / A researcher / Very /
    Purpose of use
    uso general multiproposito
    Agradecerles que toman nota cuando hay sugerencias utiles y las implementan. 1000 gracias
    [2]  2021/01/21 18:33   50 years old level / A retired person / Very /
    Purpose of use
    Wanted to know how the moment magnitude scale is defined.
    [3]  2020/10/02 08:38   40 years old level / Self-employed people / Useful /
    Purpose of use
    An M4.7 earthquake happened today just 150 km away (but 130 km deep), but I didn't feel it in my room, so was curious to see how many kilotons of TNT it equals (0.17 kt only, pretty tiny nuke :-D an only 1/10th of Beirut explosion).
    [4]  2019/07/15 12:46   30 years old level / High-school/ University/ Grad student / Useful /
    Purpose of use
    An article referencing to 50 fold of Hiroshima atomic bomb for a 7.2 Mw earthquake.
    I am fact checking through this website
    [5]  2017/09/20 05:18   60 years old level or over / An engineer / Very /
    Purpose of use
    Research for a seismic model.
    Thank you for updating the equations!
    I experienced 2 of the quakes in your list above.
    [6]  2017/09/08 05:04   60 years old level or over / An engineer / Useful /
    Purpose of use
    Converting magnitude into energy for a seismic model.
    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
    [7]  2015/05/13 14:01   Under 20 years old / High-school/ University/ Grad student / Useful /
    Purpose of use
    Math project


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