| The 1931 Central China floods or the Central China floods of 1931 are a series of floods that occurred during the Nanjing decade in the Republic of China era. It is generally considered the deadliest natural disaster ever recorded , and almost certainly the deadliest of the 20th century (when pandemics are discounted) and in China. The human casualties are estimated from lows of 400,000 to highs of 3.7 million to 4 million. |
Avalanche Disaster 
| An avalanche (also called a snowslide or snowslip) is a sudden, drastic flow of snow down a slope, occurring when either natural triggers, such as loading from new snow or rain, or artificial triggers, such as snowmobilers, explosives or backcountry skiers, overload the snowpack. |
| An earthquake is a trembling or shaking movement of the Earth's surface. Earthquakes normally result from the movement of faults, quasi-planar zones of deformation within its uppermost layers. Basically earths's tectonic plates shift every so often, and the areas on the fault lines are the ones that feel it's results. |
| An epidemic is generally a widespread disease that affects many individuals in a population. An epidemic may be restricted to one locale or may even be global (pandemic ). An outbreak of a disease is defined as being epidemic, however, not by how many members or what proportion of the population it infects but by how fast it is growing. |
| An extinction event (also extinction-level event, ELE) is a period in time when a large number of species die out. The normal background rate of extinctions is about two to five families of marine invertebrates and vertebrates every million years. Since life began on Earth, this background extinction rate has been punctuated by seven major extinction events. |
| An ice age is a period of long term reduction in the temperature of Earth's climate - resulting in an expansion of the continental ice sheets, polar ice sheets and mountain glaciers. Glaciologically, ice age is often used to mean a period of ice sheets in the northern and southern hemispheres; by this definition we are still in an ice age (because the Greenland and Antarctic ice sheets still exist). |
| Tropical storms (called Hurricanes in the Atlantic, Typhoons in the Pacific and Cyclones in the Indian Ocean) with winds that exceed 64 knots (74 mph or 119 kph) and circulate counter-clockwise about their centers in the Northern Hemisphere (clockwise in the Southern Hemisphere). |
| A hypercane is a hypothetical class of extreme hurricane or tropical cyclone that could form if ocean temperatures reached around 50 °C (122 °F), 15 °C higher than the warmest ocean temperature recorded. It could be caused by a large asteroid or comet impact , a large volcanic or supervolcanic eruption , or very extensive global warming |
| An ice age is a period of long-term reduction in the temperature of Earth's climate, resulting in an expansion of the continental ice sheets, polar ice sheets and alpine glaciers. Glaciologically, ice age is often used to mean a period of ice sheets in the northern and southern hemispheres; by this definition we are still in an ice age. |
| The Toba eruption (the Toba event) occurred at what is now Lake Toba about 71,500 ± 4000 years ago. It had an estimated Volcanic Explosivity Index of 8 (described as "mega-colossal" ), making it possibly the largest volcanic eruption within the last two million years. |
| A famine is a widespread shortage of food that may apply to any faunal species, which phenomenon is usually accompanied by regional malnutrition, starvation, epidemic , and increased mortality. |
| Megatsunami is an informal term to describe a tsunami wave heights that are much larger than normal tsunamis. Unlike usual tsunamis, which originate from tectonic activity and the raising or lowering of the sea floor, known megatsunamis have originated from large scale landslides or impact events .
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| A megathrust earthquake is an inter-plate earthquake where one tectonic plate slips beneath (sub-ducts) another. Due to the size of the tectonic plates and the shallow dip of the plate boundary, these earthquakes are among the world's largest , with moment magnitudes that can exceed 9.0. |
| A disaster is a natural or man-made event that negatively affects life, property, livelihood or industry often resulting in permanent changes to human societies, ecosystems and environment. Disasters manifest as hazards exacerbating vulnerable conditions and exceeding individuals' and communities' means to survive and thrive. |
| The 1556 Shaanxi earthquake or Jiajing earthquake is the deadliest earthquake on record, killing approximately 830,000 people.. It occurred on the morning of 23 January 1556 in Shaanxi, China. More than 97 counties in the provinces of Shaanxi, Shanxi, Henan, Gansu, Hebei, Shandong, Hubei, Hunan, Jiangsu and Anhui were affected. |
| A supervolcano refers to a volcano that produces the largest and most voluminous kinds of eruptions on earth. The actual explosivity of these eruptions varies, but the sheer volume of extruded magma is immense enough to radically alter the landscape and severely impact global climate for years, with a cataclysmic effect on life . |
| With all the media focusing on the reality of what a super volcano is, I have decided to compile all the resources that Armageddon Online has written and focused on over the years. Our original article was written in 2002 after a series on the BBC went into great detail about their cataclysmic eruptions - and potentially earth altering effects. |
| A disaster is a natural or man-made event that negatively affects life, property, livelihood or industry, often resulting in permanent changes to human societies, ecosystems and environment. Disasters manifest as hazards exacerbating vulnerable conditions and exceeding individuals' and communities' means to survive and thrive. |
| A death toll is the number of dead as a result of war, violence, accident, natural disaster, extreme weather, or disease.Below is a list of death tolls for various infamous natural disasters. Most numbers are estimates and are often in dispute. The incidents are ranked by the highest estimate given. |
| The Yellowstone Caldera , also known as the Yellowstone supervolcano , is a highly geologically active region in Yellowstone National Park. It measures 55 kilometers by 72 kilometers. |
| A tornado is an etremely intense windstorm known by a twisting, funnel-shaped cloud. The event appears in storms all around the world, though they most commonly occur in a broad area of the American Midwest and South known as Tornado Alley, but some other countries see the storms occur in even higher densities. |
| In meteorology, a tropical cyclone is a type of low-pressure system which generally forms in the tropics. While some, particularly those that make landfall in populated areas, are regarded as highly destructive, tropical cyclones are an important part of the atmospheric circulation system, which moves heat from the equatorial region toward the higher latitudes. |
| A tsunami is a series of waves created when a body of water, such as an ocean is rapidly displaced on a massive scale. Earthquakes , mass movements above or below water, volcanic eruptions and other underwater explosions, landslides and large meteorite impacts all have the potential to generate a tsunami. |
| The water crisis is the status of the world’s water resources relative to human demand as of the 1970s and to the current time. The major aspects of the water crisis are overall scarcity of usable water and water pollution. |
| A list of the worst natural disasters in history . Sorted by earthquakes , floods , landslides, tornadoes , volcanoes etc. It seems that floods are the most deadly types of natural disasters, with all five of the deadliest floods appearing in the top ten deadliest disasters of all time. |
| There are other supervolcanoes on Earth, some of which erupted in prehistoric times and could erupt again. At least one has had an eruption bigger than Yellowstone's largest and may have played a critical role in shaping human history. |
