There is no set timing. Faults move when pressure has built up sufficiently. Unfortunately we cannot predict such events.
It's a earthquake where two plates move sideways from eachother for example the San Andreas Fault is a strike-slip earthquake.
The plate within the crust where an earthquake occurs is often along a fault line, where two tectonic plates are in contact. When stress builds up along the fault line and is released suddenly, it causes the plates to move, resulting in an earthquake.
Earthquake
A fault line becomes active when the stress accumulated along the fault exceeds the strength of the rocks, causing them to break and move. This movement can result from tectonic forces, such as the shifting of tectonic plates. When the stress is released, it often leads to earthquakes. Continuous tectonic activity can keep a fault line active over time, leading to repeated seismic events.
It is called an earthquake when rocks and soil in the Earth move suddenly due to the release of energy along fault lines.
The fault that caused the Christchurch earthquake, specifically the Port Hills Fault, last moved during the significant earthquake that struck on February 22, 2011. This earthquake had a magnitude of 6.3 and resulted in widespread damage and loss of life in Christchurch, New Zealand. The fault movement during this event was part of the ongoing tectonic activity in the region.
If the fault is responsible for the earthquake, there will be movement (displacement) along the fault.
The result is commonly known as an earthquake.
Earthquake
strike slip fault---------------------------------------------------------------------------------------------------------------- BITCHOSAURUS REX
The break is a fault in the rock that can lead to an earthquake, whose tremors can cause much damage to property and death.
the answer is an earthquake because the plates move so suddenly it makes the earth shake so therefore it would be called an earthquake!