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Geology Calculators
Free online geology calculators for earthquake magnitude comparison and rock density measurement.
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Earthquake Magnitude
Compare earthquake magnitudes and energy release.
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Rock Density Calc
Calculate rock density and compare against references.
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Earthquake Magnitude
Compare earthquake magnitudes and calculate energy release (Richter scale)
Magnitude Comparison
M₂ is 31.6× stronger
Energy: 31.6× more · Amplitude: 10.0× larger
Energy Ratio
31.6
Amplitude Ratio
10.0
E₁ Energy (J)
2.0e12
E₂ Energy (J)
6.3e13
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Rock & Mineral Density
Calculate density of rocks and minerals, and compare against a reference table
Calculated Density
3.00 g/cm³
Similar to: Basalt
g/cm³
3.00
kg/m³
3000
Specific Gravity
3.00
Reference: Common Rock Densities
Granite2.65 g/cm³
Basalt2.90 g/cm³
Limestone2.50 g/cm³
Sandstone2.30 g/cm³
Marble2.70 g/cm³
Quartz2.65 g/cm³
Diamond3.52 g/cm³
Gold19.32 g/cm³
Iron7.87 g/cm³