Our earth was made in perfect shape but it did not stay that way. This takes us back to Noah’s time, the flood spread far beyond small area. It was a world wide event, it's not a usual flood caused by dams today. The flood started when the deep parts of the earth bursted open and water came rushing up, while it rained for forty days. The earth was destroyed by this ,only those inside the ark were safe. science now named those breaks "tectonic plates," and when they left, earthquakes occured. So now the question is why do we now experience earth quakes, tsunamis and other disasters when everything was made by God beautifully? The explanation says these things are trouble caused by human sin.Our earth was not created to shake or collapse,but humans actions brought these bad events in our world.