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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, and earthquakes.[1][2]

Types of natural phenomena include, but are not limited to, the following.

Contents

BiologicalEdit

 
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.

ChemicalEdit

 
Crystal in VCGS furnace

GeologicalEdit

 
Geology: parabola-shaped lava flow illustrates Galileo's law of falling bodies, as well as blackbody radiation. The temperature can be discerned from the color of the blackbody.

Geological processes include erosion, sedimentation, and volcanic activities such as geysers and [

MeteorologicalEdit

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

Atmospheric optical phenomenaEdit

A double rainbow at Minsi Lake, Pennsylvania
Atmospheric optical phenomenon

Nuclear and ElectricalEdit

OceanographicEdit

 
Gulfstream

PhysicalEdit

See alsoEdit

ReferencesEdit

  1. ^ Missy Allen; Michel Peissel (1993). Dangerous natural phenomena. Chelsea House. ISBN 079101794X. 
  2. ^ William R. Corliss (1977). Handbook of unusual natural phenomena. Sourcebook Project. ISBN 0915554011.