This is what a volcanic eruption looks like in satellite radar

.  This is a picture of the Pico do Fogo volcano erupting on Cape Verde's Fogo Island.
The European Space agency captured two images one before it erupted and one after it erupted.
By using satellite images, scientists created a radar interferogram which shows the change in height of the ground below. The result is a rainbow-colored image, showing the major shifts that occurred.