upheaval (noun) – a lifting of the earth, or figuratively, a great and/or sudden change
Here are some examples of how you can use upheaval:
These hills were created by an upheaval in the earth’s crust (= outer layer).
In 2008 there was a great upheaval in the stock market which caused many financial problems for a great many people and some banks to collapse.
The country has been in upheaval since the government tried to ban the social reform movement.
Many people dislike the upheaval that comes with moving house.
Our family has been in upheaval since the divorce.