Isaiah 13

What is it like when God reveals his anger. In one word Isaiah summarizes the experience; terrible. We have all felt earthquakes. The ground's violent shakes are terrifying to even the most tolerant of people. But who has experienced a heaven-quake? That is what God promises in verse 13. We have seen the impact on the physical world when an earthquake hits, but what will be the results in the physical realm when God shakes the heavens?
Stuart