Natural phenomenon

As a natural phenomenon or natural event are the people appearing, that is flashy or measurable natural events referred to are due to natural causes. In contrast, there are anthropogenically induced phenomena that go back directly or indirectly to human activity.

Important groups of natural phenomena are:

• Celestial phenomena of all kinds, such as objects and movements in the starry sky, which changes as novae or variable, surprising phenomena such as comets or meteors - see also Astronomical phenomena
• Meteorological and hydrological phenomena, such as climate and weather phenomena, thunderstorms, strong winds (storms ), heavy rain, snow, hail, thunder and lightning, objects of observation such as air pressure and temperature, including phenomena of atmospheric optics such as rainbows, halos, noctilucent clouds, dusk, evening and dawn, midnight sun, northern lights
• Geological and other geoscientific processes such as tectonics, earthquakes, volcanism, column, and mountain building, erosion, and their diverse manifestations, Karst, outflow phenomena, avalanches, rockfall, landslides, etc.
• Biological observations such as migration and distribution of populations, propagation or extinction phenomena of ecology and reactions of the environment, etc.
• Etc. microbiological phenomena such as soil fauna, changes in the occurrence of bacteria and microbes, aquatic ecology
• Energy and nuclear physics: phenomena, according to the heavenly body and solar radiation, formation of deposits, decay of radioactive isotopes