::The Crying Earth::

Natural Disaster And How It Came

Natural disaster is the consequence of a natural hazard that affects human activities, environment and leads to financial, environment and human loss. Some of natural disasters are tsunami, earthquake, landslide, volcanic eruption, hurricane, flood, epidemic, and drought. A natural hazard is a threat of an event that will have a negative effect on people or the environment. Many natural hazards are related for example earthquakes can result in tsunamis; drought can lead directly to famine and disease. A concrete example of the division between hazard and disaster is that tragedy at San Francisco (1906), earthquake was a disaster. Where as earthquakes are hazards. Hazards are consequently relating to a future occurrence and disasters to past or current occurrences.

In natural disaster it divide by four situation disaster which land movement disaster, water disaster, whether disaster and health and disease. Examples of land movement disaster are earthquake, volcanic eruption and landslide. For our information, earthquake is a sudden shake of the Earth's crust. Earthquakes are caused by the discharge of accumulated along geologic faults. The earthquake has point of origin underground called the "focus”. Earthquakes by themselves rarely kill people or wildlife. It is usually the secondary events that they trigger, such as building collapse, fires, tsunamis and volcanoes that are actually the human disaster. While volcano occur when the Earth's plates pull apart causing magma to rise to the surface. Volcanoes can also occur over hotspots and where one plate dives beneath another, forcing magma to rise to the surface.

Categories for water disaster are flood, limnic eruption and tsunami. Actually flood can become environmental disaster from what it happen. If flood are come from human activity it’s not natural disaster so for this flood it happen when Tropical Cyclones happen will can result in extensive flooding and storm surge. A limnic eruption occurs when CO₂ suddenly erupts from deep lake water, posing the threat of suffocating wildlife, livestock and humans. Such an eruption may also cause tsunamis in the lake as the rising CO₂ displaces water. Scientists believe landslides, volcanic activity, or explosions can trigger such an eruption. Till date, only two limnic eruptions have been observed and recorded. One of them in Cameroon (1984), a limnic eruption in Lake Monoun caused the deaths of 37 nearby residents.

Other categories is whether disaster which contains of phenomenon blizzard, cyclonic storm, drought, hailstorm (are rain drops that have formed together into ice), heat waves, tornadoes and fire. Finally categories are health and disease which contain epidemic, famine and space. For epidemic, it’s an outbreak of a contractible disease that spreads at a rapid rate through a human population. A pandemic is an epidemic whose spread is global. There have been many epidemics throughout history, such as Black Death. In the last hundred years, significant pandemics include Spanish flu (1981), killing an estimated 50 million people worldwide, AIDS epidemic and the new pandemic H1N1 Influenza (Swine Flu, 2009). One of disease come from space is solar flare. A solar flare is a phenomenon where the sun suddenly releases a great amount of solar radiation, much more than normal.