A blank forms when plates converge

An earthquake, when plates move or converge and earthquake will form

earthquake

Explanation:

If two tectonic plates collide, they form a convergent plate boundary. Usually, one of the converging plates will move beneath the other, a process known as subduction. Deep trenches are features often formed where tectonic plates are being subducted and earthquakes are common.

most community's take hundreds of years to become stable