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Table 3. Typical values and variations of magma properties and conduit sizes used in this study.

From: Volcano inflation prior to an eruption: Numerical simulations based on a 1-D magma flow model in an open conduit

Property

Symbol

Typical value

Variation range

Melt density

ρ r

2.5×103 kg m–3

 

Bulk modulus of melt

K l

1.2×1010 Pa

 

Gas constant

B

8.31 J K–1 mol–1

 

Magma temperature

T

1100 K

 

Melt viscosity

η f

105 Pa s

104–105 Pa s

Gas bubble number density

n

1015 m–3

1012–1018m–3

Diffusivity

D

10–9 m2/s

10–10–10–8 m2/s

Initial pressure difference

Δp

0.1 MPa

0.1–1 MPa

Conduit radius

a

10 m

3–10 m