<p>Surprisingly enough most of the figures I could find were actually about thermal output but back working the figures, and assuming I read the formulas properly (not guaranteed I'm afraid) it looks like 5-7 litres per second is the ballpark average gas flow based on fifty years worth of data from several fumarole fields in the central North Island of New Zealand. I have no idea how representative that figure would be of fields elsewhere.</p>

CC BY-SA 4.0
2018-05-30T17:31:34.670Z
2018-05-30T17:31:34.670Z
Ash
<p>Obviously, there is going to be a large amount of variability, but what are some realistic values? </p>

CC BY-SA 4.0
2018-05-28T15:23:22.827Z
Are you interested in gas volume or particulate throughout/deposition?
Ash
CC BY-SA 4.0
2018-05-29T19:10:27.060Z
I'm more interested in gas volume.
g.z.
<geology><volcanology><petrology>
What's a reasonable flow rate/mass flux for a fumarole?
g.z.
# What's a reasonable flow rate/mass flux for a fumarole?

(Asked by: username_0 on 2018-05-28)

Obviously, there is going to be a large amount of variability, but what are some realistic values?

**Tags:** geology, volcanology, petrology

> **Comments:**
> **username_1**: Are you interested in gas volume or particulate throughout/deposition?  
> **username_0**: I'm more interested in gas volume.  

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## 1 answers

### Answer by username_1 on 2018-05-30. Score: 1 | Accepted answer

Surprisingly enough most of the figures I could find were actually about thermal output but back working the figures, and assuming I read the formulas properly (not guaranteed I'm afraid) it looks like 5-7 litres per second is the ballpark average gas flow based on fifty years worth of data from several fumarole fields in the central North Island of New Zealand. I have no idea how representative that figure would be of fields elsewhere.


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