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sci.earthquake-magnitude-energy Calculator
Calculates seismic energy and magnitude using log E = 4.8 + 1.5M (energy in joules) and moment magnitude from seismic moment M₀ = μAD. The 2004 Indian Ocean earthquake (M9.1) released 2 × 10¹⁸ J — equivalent to 1,500 Hiroshima bombs — and generated a tsunami that killed 230,000 people.
Inputs
Mw
Reference formula or conversion factor shown for context.
Results
seismic energy E (Joules)
Sample size or count used in the calculation.
equivalent TNT (tonnes)
Sample size or count used in the calculation.
estimated felt radius (km)
The computed radius -- half the diameter.
log₁₀E = 1.5Mw + 4.8
Reference formula or conversion factor shown for context.