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Table 2 Model input parameter ranges and best-fit eruption parameters based on geological data for each of the Holocene units

From: Challenges of determining frequency and magnitudes of explosive eruptions even with an unprecedented stratigraphy

Model parameter (units) Input value or range Unit Y Unit W Unit U Unit S Unit P Unit W-Y
Volcano        
Easting (m) 645,110       
Northing (m) 2,158,088       
Elevation (m asl) 3850       
Total eruption mass (kg) 108–1013 3.5 × 1011 2.8 × 1011 1 × 1011 1.2 × 1011 1.9 × 1011 1.2 × 1012
Eruption column        
Height (km asl) 10–30 30 29 28 29 29 26
Integration steps 60       
Shape parameter (α) 1.0 1 1 1 1 1 1
Shape parameter (β) 0.001–7.0 1.5 0.9 1.2 3.9 4.3 2.8
Particle        
Median (φ) −3 – 0 −1 0 −0.5 −1.5 −1.6 0
Standard deviation (φ) 1–2 1 1 1 1.2 1 1.8
Maximum (φ) −6       
Minimum (φ) 6       
Lithic density (kg m−3) 2700       
Pumice density (kg m− 3) 450       
Fall time threshold (s) 103–109 4.7 × 107 9.9 × 108 9.9 × 108 1.2 × 107 6.4 × 105 10 × 103
Integration steps 60       
Atmosphere        
Eddy constant (m2s−1) 0.04       
Diffusion coefficient (m2s− 1) 500–5000 4903 3995 4995 2388 1652 5000