An aurora is a natural phenomenon.

A natural phenomenon is an observable event which is not man-made. Examples include: sunrise, weather, fog, thunder, tornadoes; biological processes, decomposition, germination; physical processes, wave propagation, erosion; tidal flow, and natural disasters such as electromagnetic pulses, volcanic eruptions, hurricanes and earthquakes.

History

Over many intervals of time, natural phenomena have been observed by a series of countless events as a feature created by nature.

Physical phenomena

The act of:

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  • Crystal in VCGS furnace
  • Liquid hydrogen bubble chamber photograph of an anti-proton colliding with a proton
  • Children notice an effect of static electricity

Chemical phenomena

Biological phenomena

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  • Decomposition:a decaying peach over a period of six days. Each frame is approximately 12 hours apart, as the fruit shrivels and becomes covered with mold.

Astronomical phenomena

  • Supernova

Geological phenomena

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Meteorological phenomena

Violent meteorological phenomena are called storms. Regular, cyclical phenomena include seasons and atmospheric circulation. climate change is often semi-regular.

Atmospheric optical phenomena

A circumzenithal arc over Grand Forks, North Dakota
The Belt of Venus over Paranal Observatory atop Cerro Paranal in the Atacama Desert, northern Chile
Crepuscular rays at sunrise in Malibu, California

Atmospheric optical phenomena include:

A double rainbow at Minsi Lake, Pennsylvania

Oceanographic

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  • Tsunami by Hokusai 19th century
  • Source: "Physiography for High Schools" by Albert L. Arey, Frank L. Bryant, William W. Clendenin, and William T. Morrey. 1911, USA.
  • Shoreline wave-breaking (surf); Human riding surfboard.

See also