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Earth of fire

Actualité volcanique, Article de fond sur étude de volcan, tectonique, récits et photos de voyage

Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques

In Momotombo, as microseismic activity recorded by seismographs remain high, INET and Red Sismologica of Nicaragua suggested possible future eruptions.

This Feb. 19, two major explosions rocked the volcano, at 1:08 and 9:43. On the Webcam of the first explosion, we see the spread on the flanks of the fallout.



Momotombo - explosion 02.19.2016 / 9:45 - webcam seismic station El Cardon / Ineter

Momotombo - explosion 02.19.2016 / 1:08, seen by the webcam of the seismic station El Cardon / Ineter

Momotombo - explosion 02.19.2016 / 1:08, seen by the webcam of the seismic station El Cardon / Ineter

Momotombo - explosion 02.19.2016 / 9:45 - webcam seismic station El Cardon / Ineter

Momotombo - explosion 02.19.2016 / 9:45 - webcam seismic station El Cardon / Ineter

Momotombo - the plume from the explosion seen by 9:45 Canal2Nicaragua / Twitter

Momotombo - the plume from the explosion seen by 9:45 Canal2Nicaragua / Twitter

Momotombo - the plume from the explosion seen by 9:45 Canal2Nicaragua

In Guatemala, in addition to Santiaguito pursuing his ash emissions and that Fuego has small explosions, the INSIVUMEH recommends to restrict the access to Pacaya.

Pacaya has an activity on the rise, characterized by small explosions, the expulsion of bluish gas (sulfide gas) and low-level white fumaroles.

 

Pacaya - photo taken by the INSIVUMEH January 11, 2014 (used by Soy502) illustrating the current situation.

Pacaya - photo taken by the INSIVUMEH January 11, 2014 (used by Soy502) illustrating the current situation.

In Colima, who had accustomed us to explosive eruptions decorated with fine ash plumes, the situation appeared calmer ... what intrigued volcanologists from the University of Colima.

Nick Varley, a research professor chartered
with a few students a private reconnaissance flight, which revealed the existence of a new dome, 25 meters in diameter and 10 meters high, in the crater of a diameter about 300 meters. The temperature measurement in the thermal camera gives values ​​of 700 ° C, corresponding to 850 ° C if the measure had been manual.

The new dome will take time to fill the crater during an effusive episode, before the new start of an explosive sequence.

Colima - 01/19/2016 plume versus the cone on 02/19/2016 - Photo webcamsdeMexicoColima - 01/19/2016 plume versus the cone on 02/19/2016 - Photo webcamsdeMexico

Colima - 01/19/2016 plume versus the cone on 02/19/2016 - Photo webcamsdeMexico

 The new dome of Colima on February 2016 - Doc. Univ. Colima oficial
 The new dome of Colima on February 2016 - Doc. Univ. Colima oficial

The new dome of Colima on February 2016 - Doc. Univ. Colima oficial

Seismicity of Nevados de Chillan, Chile, remains high, with 924 episodes, which 63 VT related to fracturing rocks (the strongest of 3.2 M), 858 LP events related to fluid dynamics and 3 earthquakes tornillo type, associated with resonance in the ducts. The tremor was also well represented with 175 discrete episodes.

Webcams show the occurrence of occasional explosions in the vicinity of Nuevo and Arrau craters area..

An overflight conducted with Onemi (see video) identified a third crater, aligned on
150 meters with the other to the north - northeast, and a decreaseof the fumerolian activity  in relation to a decrease in temperature since January, indicating a decrease in heat transfer from the hydrothermal system.

Source: SERNAGEOMIN - Reporte de Actividad Volcánica (RAV) / LED REGIÓN Biobio Año 2016 febrero - Volumen 03

On the island of Sumatra, the Sinabung introduced on 02.19.2016 at 8:03 p.m. a great explosion; she was accompanied by glowing gas, a black plume and some incandescent fall of rocks (without pyroclastic flow)
.

Sinabung - the explosion of 02/19/2016 / 8:03 p.m. - photo endrolewa

Sinabung - the explosion of 02/19/2016 / 8:03 p.m. - photo endrolewa

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