1 Kings 19:11 (c) Probably this is telling us that great calamities and sudden tragedies do not always bring a message from GOD to the heart. It is the Holy Spirit who imparts divine impressions to the soul.
Matthew 28:2 (c) It is symbolical of the fact that things which the world calls "real" are not very stable. The One who made the world is able to shake it. The foundations of this earth will come under the judgment of GOD to be destroyed and the inhabitants will be punished. (See also Matthew 27:51; Acts 16:26).