Scholarly Open Access Natural Disasters Journals Natural processes of the earth leading to adverse effects are Natural Disasters. Earthquakes, Volcanoes, Floods, Tsunami, and other geological processes are Natural Disasters.Natural processes of the earth leading to adverse effects are Natural Disasters. Earthquakes, Volcanoes, Floods, Tsunami, and other geological processes are Natural Disasters. Adverse effects in an area of vulnerable population will result in disaster. Natural Disaster may cause Loss of Life, or Damage to property. Sudden release of energy in the Earth's crust that is capable of creating seismic waves results in Earthquake. Water overflow submerging dryland os called Flood.