<p>At a depth of about 1200 km, the temperature can be assumed to be constant, about 5,200° Celsius (9,392° Fahrenheit).</p>
<p>At depths between few hundred meters and some kilometers, the temperature is strongly affected by tectonics/groundwater flow, as represented by the heat flow maps.</p>
<p>You can however extract some informations from the database of the <a href="http://ihfc-iugg.org/" rel="nofollow noreferrer">International Heat Flow Commission (IHFC)</a></p>
<p><a href="http://ihfc-iugg.org/products" rel="nofollow noreferrer">http://ihfc-iugg.org/products</a></p>

CC BY-SA 4.0
2023-05-01T12:34:34.477Z
2023-05-01T12:34:34.477Z
EarlGrey
<p>I see similar flavours of this question have been asked a few times, but I still don't see a satisfying answer. I am looking for data (maps) of the earth subsurface temperature at a depth sufficient to consider the temperature more or less constant (let's say in a range of ±5% ?). I am looking for data for:</p>
<ul>
<li>Latitude: for polar, temperate and equatorial latitudes</li>
<li>Time of the year: per season or per month</li>
<li>Time of day: at noon and midnight</li>
</ul>
<p>Where can I find publicly available (free) data for this?</p>

CC BY-SA 4.0
2023-04-28T19:17:02.850Z
ERA 5 Land - Soil Temperature?
Joscha Fregin
CC BY-SA 4.0
2023-04-28T21:45:21.727Z
ERA 5 data is only up to soil level 4 (298cm deep I believe) and that shows significant variability with season
Redirectk
CC BY-SA 4.0
2023-04-28T21:51:24.953Z
Ah ok - apparently I dont know a whole lot about soil temperature. Thought it was worth a shot. Sorry for the misleading info.
Joscha Fregin
<geology><temperature><open-data><geothermal-heat><land-surface-models>
Map of earth subsurface temperature
Redirectk
# Map of earth subsurface temperature

(Asked by: username_0 on 2023-04-28)

I see similar flavours of this question have been asked a few times, but I still don't see a satisfying answer. I am looking for data (maps) of the earth subsurface temperature at a depth sufficient to consider the temperature more or less constant (let's say in a range of ±5% ?). I am looking for data for:

* Latitude: for polar, temperate and equatorial latitudes
* Time of the year: per season or per month
* Time of day: at noon and midnight

Where can I find publicly available (free) data for this?

**Tags:** geology, temperature, open-data, geothermal-heat, land-surface-models

> **Comments:**
> **username_1**: ERA 5 Land - Soil Temperature?  
> **username_0**: ERA 5 data is only up to soil level 4 (298cm deep I believe) and that shows significant variability with season  
> **username_1**: Ah ok - apparently I dont know a whole lot about soil temperature. Thought it was worth a shot. Sorry for the misleading info.  

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## 1 answers

### Answer by username_2 on 2023-05-01. Score: 2 | Accepted answer

At a depth of about 1200 km, the temperature can be assumed to be constant, about 5,200° Celsius (9,392° Fahrenheit).

At depths between few hundred meters and some kilometers, the temperature is strongly affected by tectonics/groundwater flow, as represented by the heat flow maps.

You can however extract some informations from the database of the [International Heat Flow Commission (IHFC)](http://ihfc-iugg.org/)

<http://ihfc-iugg.org/products>


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