1620s BC

Template:Short description The 1620s BC was a decade lasting from January 1, 1629 BC to December 31, 1620 BC. Template:Decadebox BC

Events and trends

• 1627 BC—Beginning of a period of cooling of the world climate lasting several years, recorded in tree-rings all over the world.<ref>Template:Cite journal</ref> Various volcanic eruptions have been suggested for the cause of this climatic event; the Minoan eruption of Thera,<ref>Template:Cite journal</ref> the Avellino eruption of Mount Vesuvius,<ref>Template:Cite journal</ref> or the eruption of Mount Aniakchak.<ref>Template:Cite journal</ref>
• 1625 BC—Samsu-Ditana becomes King of Babylon (middle chronology).
• 1621 BC—Lullaia becomes the King of Assyria.
• 1620 BC—Mursili I becomes King of the Hittite Empire (middle chronology).