Sand blows (also know as sand boils) result from the eruption of water and sand from below ground. During the 1811-1812 earthquakes, sand blows formed over an extremely large area of approximately 10,400 square kilometers.
Question 1:
Are the size of sand blows related to earthquake magnitude?
Question 2:
What are sand sills and sand dikes?
Question 3:
What is the significance of the 2001 Bhuj, India earthquake?