Thunderbolt

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The high-voltage electricity warning symbol is a contemporary example of thunderbolt iconography

A thunderbolt, or lightning bolt, is a symbolic representation of lightning. It appears variously in history, literature, and in contemporary warnings of (typically high-voltage) electricity. Thunderbolts may appear naturally among the estimated 8.6 million lightning strikes per day<ref>Lightning and Your Safety, Center for Disease Control</ref> or not: heat lightning is an electrical discharge in the atmosphere without an accompanying sound, and a Tesla coil produces an artificial "lightning"-like electrical discharge with an accompanying clap. The term "thunderbolt" adds the notion of a loud thunderclap accompanying a lightning flash, while the term "lightning bolt" — which refers directly to the electrical discharge — does not.

In Indo-European mythology, the thunderbolt was identified with the 'Sky Father'; this association is also found in later Hellenic representations of Zeus and Vedic descriptions of the vajra wielded by the god Indra. It may have been a symbol of cosmic order, as expressed in the fragment from Heraclitus describing "the Thunderbolt that steers the course of all things".<ref>DK B64.</ref>

In its original usage the word may also have been a description of the consequences of a close approach between two planetary cosmic bodies, as Plato suggested in Timaeus,<ref>Template:Cite book</ref> or, according to Victor Clube, meteors,<ref>Template:Cite book</ref> though this is not currently the case. As a divine manifestation the thunderbolt has been a powerful symbol throughout history, and has appeared in many mythologies. Drawing from this powerful association, the thunderbolt is often found in military symbolism and semiotic representations of electricity.

In history, religion and mythology

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Zeus' head and thunderbolt on a coin from Epirus, 234 BC.
The thunderbolt pattern with an eagle on a coin from Olympia, Greece, 432-c.421 BC.
Zeus' head and thunderbolt on a coin from Capua, Campania, 216-211 BC.
Ptolemaic coin showing the Eagle of Zeus, holding a thunderbolt
Bas-relief of Jupiter, nude from the waist up and seated on a throne
Neo-Attic bas-relief sculpture of Jupiter, holding a thunderbolt in his right hand; detail from the Moncloa Puteal (Roman, 2nd century), National Archaeological Museum, Madrid

Depictions of lightning have appeared throughout history, and religions and mythologies. Often it is the weapon of a sky god and weather god. As such, it is an unsurpassed method of dramatic instantaneous retributive destruction: thunderbolts as divine weapons can be found in many mythologies.

Thunderstones

The name "thunderbolt" or "thunderstone" has also been traditionally applied to the fossilised rostra of belemnoids. The origin of these bullet-shaped stones was not understood, and thus a mythological explanation of stones created where a lightning struck has arisen.<ref> Template:Cite web</ref>

In the modern world

The thunderbolt or lightning bolt continues into the modern world as a prominent symbol, and term; it has entered modern heraldry and military iconography.

In iconography

In fiction

In names

The term "thunderbolt" as a verbal representation of a lightning bolt accompanied by a loud thunderclap is used to convey power and speed.

Unicode code points

Related forms have these code points:

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See also

References

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