Prayer: If someone is unconscious during an earthquake and wakes up after, is āyāt prayer still obligatory?

Practical Laws of Islam as per the teachings of Imam Khamenei

Prayer: If someone is unconscious during an earthquake and wakes up after, is āyāt prayer still obligatory?

English:

Question #710:

If someone is unconscious when an earthquake occurs, and becomes conscious after its occurrence, will the āyāt prayer be obligatory for him?

Answer #710:

As for the given assumption, it is an obligatory caution that he offers the āyāt prayer.

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