Global Geological And Climatic Events

Places in news: Ubinas Volcano

Note4Students

From UPSC perspective, the following things are important :

Prelims level: Ubinas Volcano

Mains level: NA

Central Idea

  • Peru declared a state of emergency for sixty days in areas around the Ubinas volcano.
  • The volcano has been spewing ash and gas and is probably set to erupt.

Ubinas Volcano

  • Ubinas is an active stratovolcano located in the Moquegua Region of southern Peru, approximately 60 kilometers east of the city of Arequipa.
  • It is part of the Central Volcanic Zone of the Andes and stands at an elevation of 5,672 meters above sea level.

Geological Characteristics

  • Stratovolcano Formation: Ubinas is characterized by its stratovolcano structure, comprising layers of hardened lava, ash, and other volcanic materials.
  • Caldera and Crater: The volcano’s summit contains a 1.4-kilometer-wide and 150-meter-deep caldera, within which lies a smaller crater. This distinct feature adds to the volcano’s geological significance.
  • Ubinas I and Ubinas II: The volcano exhibits an upwards-steepening cone shape, with a notable notch on its southern side. The lower part is referred to as Ubinas I, while the steeper upper section is known as Ubinas II, representing different stages in the volcano’s geological history.

Volcanic Activity

  • Active Volcanic History: Ubinas is recognized as the most active volcano in Peru, displaying a history of small to moderate explosive eruptions and persistent degassing.
  • Notable Eruptions: The volcano has experienced notable eruptions throughout history, including the 2006–2007 event that resulted in eruption columns, ash fall, health concerns, and evacuations in the region.
  • Recent Activity: From 2013 to 2017, Ubinas exhibited lava flow within the crater, accompanied by ash falls, leading to further evacuations in nearby towns.

Eruption and Impact

  • Ash and Gas Emissions: The Ubinas volcano has been actively spewing ash and gas.
  • Smoke Cloud and Affected Areas: The smoke cloud generated by the eruption has reached towns located up to 10 kilometers away from the volcano. This has raised concerns for the well-being of approximately 2,000 people residing in the affected areas.
  • The “Ring of Fire”: The region where Ubinas is situated falls within the “Ring of Fire,” an area around the Pacific Ocean known for its high volcanic and seismic activity.

 

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