Most of the time a earthquake happens
their was no choices so hope this is what you were looking for
have a great rest of your day :)
Explanation:
To expand on the other persons answer, before an eruption the area around the volcano will most likely start experiencing earthquakes or tremors, this is because magma and chunks of rock are pushing through the earths crust. Other things are also common, such as hot springs near the soon to erupt volcano may change in temperature or new hot springs may form.
