sci.seismic-wave-attenuation Calculator
Calculates seismic wave amplitude decay from geometric spreading and anelastic attenuation (Q factor): A(r) = A₀/r × exp(−πfr/Qv). Low Q materials (soft sediment, Q ≈ 30) attenuate seismic waves rapidly — high Q crystalline rock transmits waves for hundreds of km.
Inputs
- Frequency Hz
- Cycles per second (Hz). Audible sound: 20 Hz – 20 kHz. Make sure units match what the formula expects.
- Q Factor
- A multiplier applied in the calculation.
- Distance Km
- Separation between two points or total path length. Check that units are consistent throughout the calculation.
- Velocity Km S
- Speed in a specified direction (m/s). Required for momentum, kinetic energy, and wave calculations.
Results
- amplitude attenuation ratio
- The proportional relationship between two quantities.
- amplitude loss (dB)
- The decrease or degradation from the baseline.
- attenuation coefficient α (1/km)
- The value at the specified point or condition.
- penetration depth 1/e (km)
- The proportional relationship between two quantities.
- A = A₀ × exp(-αr)
- Reference formula or conversion factor shown for context.
- Q factor
- A dimensionless multiplier applied in the calculation.
attenuation seismic wave ratio loss