Prayer: If multiple tremors follow an earthquake, is āyāt prayer required for each one?

Practical Laws of Islam as per the teachings of Imam Khamenei

Prayer: If multiple tremors follow an earthquake, is āyāt prayer required for each one?

English:

Question #711:

After an earthquake in an area it is often observed that dozens of tremors occurs there in a short period of time. What is the rule with respect to āyāt prayer in such cases?

Answer #711:

Each quake, whether violent or mild, requires its own āyāt prayer provided that it is considered as an independent quake.

-Imam Khamenei, Practical Laws of Islam, Importance and Conditions of Prayer