Wikipedia:Main Page history/2023 January 21b

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From today's featured article  Satellite image of the caldera, the gray-yellow area at lower centre left The Cerro Blanco is a caldera in the Andes, located in Argentina's Catamarca Province. Part of the Andes' Central Volcanic Zone, it is a volcano collapse structure located at an altitude of 4,670 metres (15,320 ft) in a depression. It has been active for the last eight million years and its eruptions have created several ignimbrites. An eruption 73,000 years ago formed the Campo de la Piedra Pómez ignimbrite layer, while another eruption in 2,300 ± 160 BCE became the largest volcanic eruption of the Central Andes, and reached the highest level in the Volcanic Explosivity Index, ejecting an estimated 170 cubic kilometres (41 cu mi) of tephra. This eruption led to the formation of the most recent caldera, as well as thick ignimbrite layers. However, the Cerro Blanco has been dormant since then, although some deformation and geothermal activity have been recorded. The volcano is also known for giant ripple marks that have formed on its ignimbrite fields. (Full article...)

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Ongoing:  Recent deaths&#58;   On this day January 21  Members of the First Dáil <templatestyles src="Hlist/styles.css"> <ul><li>Theodor Fliedner ( b. 1800)</li><li>Edith Tolkien  ( b. 1889)</li><li>Vincent Lingiari  ( d. 1988)</li></ul> More anniversaries: <templatestyles src="Hlist/styles.css"/> <templatestyles src="Hlist/styles.css"/>
 * Chris Hipkins (pictured) is chosen to succeed Jacinda Ardern as Prime Minister of New Zealand and Leader of the New Zealand Labour Party.
 * A helicopter crashes near Kyiv, killing fourteen people, including Ukrainian interior minister Denys Monastyrsky.
 * In the Antiguan general election, the Labour Party retains its majority in the House of Representatives.
 * A plane crash in Pokhara, Nepal, kills all 72 people on board.
 * In the elections to the parliament of Benin, the Progressive Union for Renewal–Republican Bloc alliance retains a majority, but the opposition Democrats win back parliamentary representation.
 * Peruvian protests
 * Russian invasion of Ukraine
 * Muhammad Prakosa
 * Andi Rasdiyanah Amir
 * Anton Walkes
 * Abdul Ghani Azhari
 * Carl Hahn
 * Alireza Akbari
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 * 763 – The Abbasid Caliphate crushed the Alid revolt when a rebel leader was mortally wounded in battle near Basra in present-day Iraq.
 * 1789 – The Power of Sympathy by William Hill Brown, widely considered to be the first American novel, was published.
 * 1919 – The First Dáil (members pictured) convened at the Mansion House in Dublin and adopted a declaration of independence calling for the establishment of the Irish Republic.
 * 1972 – Tripura, formerly part of the independent Twipra Kingdom, became a state of India.
 * 2017 – Millions of people participated in the worldwide Women's March, to advocate for legislation and policies on human rights and other issues.
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