Table 1 A comparison between values produced by AshCalc and previously published values for three eruptions of varying magnitude

Chaitén 2008–Whole deposit (isopachs closed)

Watt et al. 2009

-

0.17

-

-

AshCalc

-

0.1713

0.2158^b

0.2033

Chaitén 2008–Whole deposit (mapped area)

Watt et al. 2009

-

0.15

-

-

AshCalc

-

0.1518

0.1548^b

0.1566

Chaitén 2008–3rd of May lobe

Watt et al. 2009

-

0.05

-

-

AshCalc

-

0.0478

0.0506^b

0.0535

Chaitén 2008–6th of May lobe

Watt et al. 2009

-

0.03

0.04^b

-

AshCalc

-

0.0347

0.0420^b

0.0361

Rungwe pumice eruption–Malawi (1 cm)

Fontijn et al. 2011

2.2^g

3.2

3.3^c

-

AshCalc

2.145

3.236

3.251^c

-

Rungwe pumice eruption–Malawi (3 cm)

Fontijn et al. 2011

-

-

5.8^d

-

AshCalc

-

4.301

5.818^d

-

Rungwe pumice eruption–Malawi (5 cm)

Fontijn et al. 2011

-

5.6

8.5^e

-

AshCalc

-

5.559

8.493^e

-

Minoan eruption

,1990

-

38.5

-

-

AshCalc

-

38.83

39.01^f

42.34