Chillán volcano news & activity updates:
Nevados de Chillán volcano (Chile): new ash emissions
Sunday Apr 02, 2017 18:50 PM | BY: T
Fist ash emission from Nevados de Chillan on 1 April 2017 (image: Sernageomin via Culture Volcan)
Second, smaller ash emission (Sernageomin webcam)
Hot spot at the summit crater (image: Sernageomin; annotated by Culture Volcan)
The volcano continues to produce infrequent explosions, probably phreatic in nature, from time to time. After two weeks of quiet, new ash emissions occurred in two pulses from the volcano yesterday morning.
Changes in the morphology between 11 Mar 2016 and 30 Mar 2017 (images: Sernageomin; annotated by Culture Volcan)
The first one started from around 12:35 local time and lasted about 10 minutes. It was relatively intense and generated an ash plume that dispersed towards the SSE. A smaller emission occurred at 13:55 local time, but was much smaller.
A hot spot at the crater has become visible on infrared camera images during the past days. This is probably caused by hot gasses escaping at this vent.
Whether this means a significant change in the eruptive activity of the volcano in the near future is questionable. Hot fluids circulating inside the upper volcanic edifice (the hydrothermal system) have been disturbed by a small magma intrusion at shallow depth for some time, with varying intensity. An increase in this activity resulting in the currently observed hot gas release is not necessarily a sign or precursor of magmatic eruptions, although a further increase in activity cannot be excluded.
Changes to the summit morphology:
Since the beginning of the ongoing crisis in January 2016, the sporadic explosions have changed the morphology of the summit region profoundly: originally, several craters had formed on the active cone (Arau), but over time, they have merged into one larger crater.
Links / Sources:
Links / Sources:
- Le point sur l'activité des volcans Chirinkotan, Reventador, Nevados de Chillàn et Fuego (Culture Volcan)
Thursday, Mar 16, 2017
Wednesday, Mar 15, 2017
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Wednesday, Mar 08, 2017
A series of new, moderately sized ash emissions occurred from the volcano yesterday (7 Mar 2017), showing that it remains in a restless state. ... [more]
Tuesday, Mar 07, 2017