During the exam, when you feel some tremors, duck, cover and hold. The faculty/ proctor will kindly be advised to order evacuation when tremor lasts for more than eight (8) seconds (counted in this way: 1001, 1002, 1003, 1004, 1005, 1006, 1007, 1008). This is already an abundance of caution. We were told that evacuation is typically done when tremor lasts for 20 seconds. In our case, we are doing the evacuation of the rooms when the tremor lasts for 8 seconds.