Earthquake swarm detected under dormant Parinacota volcano, Chile-Bolivia

earthquake-swarm-detected-under-dormant-parinacota-volcano-chile-bolivia

A seismic swarm has been detected under Parinacota stratovolcano along the Chile-Bolivia border on June 6, 2018, Sernageomin reports. There are no known historical eruptions of this volcano. However, Helium surface-exposure dates have been obtained for eruptions during the past 2 000 years.

The swarm started at 21:03 UTC and consisted of 90 VT (volcano-tectonic) earthquakes in 85 minutes.

The largest was ML2.3 located 6 km (3.7 miles) southwest of the crater at a depth of 10.6 km (6.6 miles). 

The alert level remains at Green.

Volcán Parinacota is the southernmost and youngest of a pair of volcanoes forming the Nevados de Payachata group along the Chile-Bolivia border.

The symmetrical, 6336-m-high (20 787 feet) volcano forms a twin volcano with the dominantly Pleistocene, 6222-m-high (20 413 feet) Pomerape, which towers above a low saddle to the NE.

The collapse of Parinacota about 8 000 years ago produced a 6 km3 (1.4 mi3) debris avalanche that traveled 22 km (13.6 miles) W and blocked drainages, forming Lake Chungará.

Holocene eruptive activity has subsequently reconstructed the stratovolcano, which contains a pristine, 300-m-wide (984 feet) summit crater and youthful lava flows on the W flanks.

Although no historical eruptions are known, Helium surface-exposure dates have been obtained for eruptions during the past two thousand years both from the main cone and the Ajata group of satellite cones and lava flows on the S and SW flanks.

Featured image: Nevados de Payachata volcano group along the Chile-Bolivia border. Credit: NASA

If you value what we do here, open your ad-free account and support our journalism.

Share:

Related articles

Producing content you read on this website takes a lot of time, effort, and hard work. If you value what we do here, select the level of your support and register your account.

Your support makes this project fully self-sustainable and keeps us independent and focused on the content we love to create and share.

All our supporters can browse the website without ads, allowing much faster speeds and a clean interface. Your comments will be instantly approved and you’ll have a direct line of communication with us from within your account dashboard. You can suggest new features and apps and you’ll be able to use them before they go live.

You can choose the level of your support.

Stay kind, vigilant and ready!

$5 /month

  • Ad-free account
  • Instant comments
  • Direct communication
  • New features and apps suggestions
  • Early access to new apps and features

$50 /year

$10 /month

  • Ad-free account
  • Instant comments
  • Direct communication
  • New features and apps suggestions
  • Early access to new apps and features

$100 /year

$25 /month

  • Ad-free account
  • Instant comments
  • Direct communication
  • New features and apps suggestions
  • Early access to new apps and features

$200 /year

You can also support us by sending us a one-off payment using PayPal:

Leave a reply

Your email address will not be published.