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Archive for the ‘Nevado del Ruiz’ Category

Galeras Volcano Erupts Twice in 24 Hrs

Posted by feww on June 9, 2009

NO Early Rest for Furious Galeras!

Galeras could erupt continually throughout 2009  and most of 2010 [FEWW]

Colombia’s Galeras volcano erupted twice in 24 hours, covering nearby villages in a blanket of volcanic ash.


Galeras Volcano. Photo source: Colombia Report. Image may be subject  to copyright.


Galeras seen in this aerial photo (Undated). Source: Alaska Earthquake Information center. Image may be subject to copyright.

“An eruption of explosive nature has been registered,” the national geological institute Ingeominas said.

Although the earlier eruption on Sunday caused no damage, the authorities ordered 8,000 residents to evacuate the surrounding villages.

The second explosion on Monday was the 8th eruption one this year to shake the volcano, which is located in the Colombian department of Nariño near the town of  Pasto, and close to the Ecuadorean border.

Currently the most active volcano in Colombia, the 4,276-meter-high volcano’s first historical eruption occurred on December 7, 1580. The volcano resumed activity in 1988 after 10 years of dormancy. It erupted in 1993, killing nine people, three tourists and six scientists who had descended into the volcano’s crater to conduct tests.

galeras from Pasto stan williams
Galeras from Pasto (1993?). Photo by Stan Williams. Image may be subject to copyright.

Galeras activity in 2009

  • 14 February 19:11 an eruption spewed ash SO2 and other and volcanic gases. (Red Alert, Level I). [Pasto was covered in ash, 8,000 people evacuated.]
  • 20 February 07:05 spewed ashes. (Red Alert,  Level I).
  • 12 March 19:30, and 13 March 15:55 explosions were recorded (Orange Alert, Level II ).
  • 13 March 15:55, eruption occurred spewing gas and hot ashes at 16:34 further emission was recorded. (Orange Alert, Level II).
  • 24 April 07:32, two explosions were recorded. (Orange Alert, Level II).
  • 29 April monitors recorded increase in seismic activity. (Orange Alert, Level II).
  • 11 May 11:58, tectonic venting. (Orange Alert, Level II).
  • 17 May 21:40, seismic activity recorded. (Orange Alert, Level II).

Eight of Colombia’s 15 volcanoes have erupted in the last 100 years, and three of them since 1990: Galeras, Nevado del Huila, and Nevado del Ruiz.

An explosive eruption ruptured the summit of Nevado del Ruiz on November 13, 1985, spewing about 20 million cubic meters of volcanic ash and rocks into the air. Forty-meter thick lahars traveling at velocities of up to 50 kilometers per hour destroyed the town of Armero 74 km away from the explosion crater, killing more than 23,000 people. [Source: USGS]

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Posted in Explosive Eruption, Nevado del Huila, Nevado del Ruiz, volcanism, volcanoes | Tagged: , , , , | 3 Comments »