Earthquakes and floods - Sings of God?

• Why do earthquakes appear? - What do we know about them today?
• Can Earthquakes be prognosticated - how good are our scientists and the technology?
• What areas of the world and especially in Europe are in danger of earthquakes?
• How can gigantic floods, like tsunamis, came into existents by submarine earthquake(seaquakes)?
• Why do we have floods of flood waters - do they appear more often than they used to do - is it the fault of the climate change?
• Do we have to expect more catastrophes in future times - what kind of part will humans play?
• Many innocent people were killed in catastrophes, e.g. floods, and that is why many people asked themselves: How can God allow such a cruel thing?
• Are the today's observed catastrophes sings of God? What does the Bible say to that?