News And now the Nevados de Chillán: alert by possible...

And now the Nevados de Chillán: alert by possible eruptive columns of up to 5 kilometers


Sernageomin reported that according to the last Special Report on Volcanic Activity (REAV), the eruptive cycle of the Nevados de Chillán Volcanic Complex continues to evolve steadily and with some significant changes.

Considering the new antecedents of surface activity and the instrumental parameters of the internal dynamics of the volcano, an explosive scenario of moderate magnitude is expected.

In this stage, the occurrence of eruptive columns up to 5 kilometers high, ballistic projections, ash fall, avalanches of volcanic debris, generation of high-speed pyroclastic currents (greater than 100 km / h) and high temperature (more than 200 ° C) would be expected. ) due to column collapse, the reaches of which could impact up to 5 kilometers to the northeast sector and 3 kilometers to the west and southwest.

Eventually, the described activity, enhanced by the availability of water (snow or rain) together with the new surface magmatic body, could generate low volume lahars channeled by the nearby ravines, mainly in the channels of the valleys located to the north and northeast of the Nicanor crater.

Therefore, Sernageomin maintains the technical alert level in yellow, which implies that the volcano is above its base threshold and that the process is unstable, therefore a probable eruption could develop in a period of weeks or months.

For its part, Onemi maintains the yellow alert of the Civil Protection System, for the communes of Pinto and Coihueco, Ñuble Region, in force since December 31, 2015 and last updated on June 16, 2020.

The Civil Protection System must keep emergency plans ready and recommend to the community not to go near the active crater, keeping a minimum distance of 5 kilometers in the northeast sector and 3 kilometers in the west-southwest.


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