VolcanicDegassing

lahar

Lahar: Lost in translation?

Lahar: Lost in translation?

Since late September, the eyes of the volcano world have turned to Gunung Agung. This prominent volcano in Bali last erupted in 1963, when it released enough sulphur dioxide to form a global stratospheric sulphate aerosol layer that led to vivid sunsets, and short-term global cooling. The 1963 eruption was one of the largest and deadliest in Indonesia in the 20th century; and many of the casualtie ...[Read More]

Villarrica erupts. March 3, 2015, Chile.

  Villarrica (Ruka Pillan in Mapudungun) is one of the most active volcanoes of southern Chile, and is a popular tourist destination in the heart of the Chilean Lake district. Villarrica has been in a continuous state of steady degassing for much of the past 30 years, since the last eruption in 1984-5, and began showing signs of increased unrest (seismicity, and visible activity in the summit ...[Read More]

Friday Field Photo – St Vincent, 1902

Today’s field photo is by Tempest Anderson, of the ‘Roseau Dry River flowing with Boiling Mud’, a picture taken in the aftermath of the May 1902 eruptions of the Soufrière of St Vincent.  The full published caption explains the origins of this boiling mud – a phenomenon we now call a lahar: ‘This is a small stream in the Wallibu Basin. When the water undermines the ba ...[Read More]