Use this geological calculation for a transparent first-pass interpretation of measured rock, soil, fluid, well, stratigraphic, isotopic, geophysical, or seismic data under an explicitly selected model.

Shear modulus

Shear modulus (rigidity) in pascals; crustal average 30 GPa.

Rupture area

Rupture area in square meters.

Average slip

Average slip over the rupture in meters.

Seismic moment M0 = mu * A * D with rigidity in pascals, rupture area in square meters and average slip in meters; result in newton meters. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Seismic moment

Seismic moment in newton meters.

• Seismic magnitudes, moments, travel times, velocities, resolution, and energy depend on instrument correction, Earth model, phase picking, geometry, attenuation, radiation pattern, bandwidth, and calibration range. Magnitude scales are not universally interchangeable.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Compare independent measurements and models, retain units and analytical metadata, propagate uncertainty, and validate interpretations against logs, cores, maps, laboratory data, or field observations.

• Moment Magnitude Calculator

  Hanks-Kanamori moment magnitude Mw = (2/3)(log10 M0 - 9.1) with seismic moment M0 in newton meters.

• Elastic Thickness Calculator

  Convert lithospheric elastic thickness to flexural rigidity D = E Te^3 / (12 (1 - nu^2)) with Te in meters, Young's modulus in pascals and rigidity in newton meters.

• Hydraulic Conductivity From Permeability Calculator

  Convert intrinsic permeability in square meters to hydraulic conductivity in meters per second via K = k * rho * g / mu (defaults for water at 20 degrees Celsius).