Smallest volcano
- Who
- sand volcanoes
- Where
- Not Applicable
- When
- 01 January 0001
Sand volcanoes, also known as sand blows, are formed during earthquakes when water is squeezed out from subsurface layers, carrying sediment with it that erupts onto the surface. The largest sand volcanoes are only around a few metres across with heights of a few tens of centimetres.