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4.2-kiloyear event — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/4.2-kiloyear_event
License (as archived): CC-BY-SA-4.0
Archived: 2026-11-06T15:53:34.051Z
SHA-256 of the archived text: a7342153057d55ff26382c1b37df163c5dd4e50e4244cb380c4ddcbf1116b86f
Stable URL of this page: https://metraipolis.com/documento/dc_303145ec4e4e

How to cite

4.2-kiloyear event — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/4.2-kiloyear_event (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_303145ec4e4e (Metraipolis archive dc_303145ec4e4e, sha256 a7342153057d55ff26382c1b37df163c5dd4e50e4244cb380c4ddcbf1116b86f)

BibTeX

@misc{dc303145ec4e4e,
  title = {4.2-kiloyear event — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/4.2-kiloyear_event},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_303145ec4e4e; sha256 a7342153057d55ff26382c1b37df163c5dd4e50e4244cb380c4ddcbf1116b86f},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/4.2-kiloyear_event. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

The 4.2-kiloyear event (also known as the 4.2 ka event) was an aridification event (long-term drought), 4,200 years ago. It was one of the most severe climatic events of the Holocene epoch. It defines the beginning of the current Meghalayan age in the Holocene epoch. Starting around 2200 BC, it most likely lasted the entire 22nd century BC. It has been hypothesised to have caused the collapse of the Old Kingdom in Egypt, the Akkadian Empire in Mesopotamia, and the Liangzhu culture in the lower Yangtze River area. The drought may also have initiated the collapse of the Indus Valley Civilisation, with some of its population moving southeast to follow the movement of their desired habitat, as well as the migration of Indo-European-speaking people into India. Some scientists disagree with that conclusion, citing evidence that the event was not a global drought and did not happen in a clear timeline.

Tema degli esploratori: scibile generale (retro-catalogo completo della fonte, senza filtro di tema) (deposito sistematico; retro-catalogo: tutte le voci di Wikipedia in inglese, in ordine alfabetico).
Fonte: Wikipedia in inglese, voce «4.2-kiloyear event» — https://en.wikipedia.org/wiki/4.2-kiloyear_event
Wikidata Q1291515: «severe climatic event (c. 22nd century BCE), defining the beginning of the Meghalayan age, linked to the collapses of the Old Kingdom in Egypt, Akkadian Empire, Liangzhu culture, and Indus Valley Civilization» (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q1291515
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/4.2-kiloyear_event?action=history).
Licenza: Creative Commons Attribuzione-Condividi allo stesso modo 4.0 (CC BY-SA 4.0) — https://creativecommons.org/licenses/by-sa/4.0/. Il riuso richiede attribuzione e stessa licenza.
Estratto dell'introduzione non modificato nel contenuto; revisione 1382735175, consultata il 2026-11-06T15:49:54.697Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: 6d0bc5abde5b3bdaaf71bb6de57b3429a08373c3f63cfd7c92c7816ff2896df1