Table 1 Regression best fit equations for the Walker and Croasdale (1971) Fogo A thickness data as a function of distance from source
From: Quantifying uncertainties in the measurement of tephra fall thickness
Data | Power law | Exponential | ||
|---|---|---|---|---|
Least squares fit | R2 | Least squares fit | R2 | |
All | 27.3x-1.6 | 0.62 | 6.1e-0.18x | 0.58 |
Quadrant A | 29.7x-2.0 | 0.72 | 5.2 e-0.28x | 0.81 |
Quadrant B | 18.5x-1.4 | 0.82 | 4.0e-0.14x | 0.79 |
Quadrant C | 193.5x-2.78 | 0.72 | 17.0e-0.39x | 0.87 |
Quadrant D | 42.3x-1.44 | 0.79 | 9.2e-0.16x | 0.82 |