In Psalm 46, David writes “God is our refuge and strength, a very present help in trouble. Therefore we will not fear though the earth gives way, though the mountains be moved into the heart of the sea, though its waters roar and foam, though the mountains tremble at its swelling.”
Matt 28 gives us another reason to trust in God. Jesus was no longer in the tomb when the two Marys went to find him, because “he has risen, as he said”. This phrase encompasses the hope we’ve been given. Firstly, that Jesus’ words were true, and secondly, that he was indeed raised from the dead. God kept His promise to Jesus, that he would not “let [Jesus] see corruption”, and through that promise, extends a glorious hope to us all.
Therefore, no matter what happens in the earth, we have no need to be afraid. God is our refuge and strength too, willing and able to help us through the troubles of this life. “The Lord of hosts is with us; the God of Jacob is our fortress”.