Natural disaster
A natural disaster was a crisis that occurred due to natural phenomena, as opposed to being caused by a person or unnatural force. One example included the cooling of a planet's core. ()

Earth had faced many natural disasters, including asteroids, volcanoes and earthquakes. ()

In 2258 of the alternate reality,  informed  that the seismic activity and lightning storm occurring on and near  was not due to a natural disaster, but rather a Romulan attack. ()

In 2268, Spock scanned the planet Cheron and found no evidence of a natural disaster having occurred, despite the large number of unburied corpses present in all the planet's cities. ()

In 2364, though no living individuals were located on Minos, Natasha Yar maintained that all natural disasters had at least some survivors. ()

In 2366, Beverly Crusher speculated that tricyanate was chosen by a saboteur to contaminate Beta Agni II's water supply because it naturally occurred on the planet, and might therefore appear to be a natural disaster at first glance. ()

In 2373, B'Elanna Torres speculated that a natural disaster might be behind the deactivation of a Borg cube. ()

The Etanian Order's preferred method of conquest was to simulate a natural disaster, then move in after the planet was evacuated. ()

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