Romans 1:18 For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men, who hold the truth in unrighteousness;
God is been offended daily because of the transgressions of men. A lot of people in the world today are engaging in evil acts like doctors performing the criminal act of abortions, father molesting his daughter, mothers killing their babies, brothers killing another etc. This acts makes God angry. When He is angry, he causes an earthquake.
Psalms 7:11 God judgeth the righteous, and God is angry with the wicked every day.
Hebrews 12:26-27 Whose voice then shook the earth: but now he hath promised, saying, Yet once more I shake not the earth only, but also heaven. And this word, Yet once more, signifieth the removing of those things that are shaken, as of things that are made, that those things which cannot be shaken may remain.
Proverbs 15:3 The eyes of the LORD are in every place, beholding the evil and the good.
We are been watched by God every even when we are doing some evil things in our closet. God is watching us when are having a secret affair because the eyes of God is everywhere and He sees all things. God is slow to anger giving everyone a chance to repent.