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Earth of fire

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

Publié le par Bernard Duyck
Publié dans : #volcanic activity

A new eruptive phase began this November 6 in Fuego, the fourth for 2018.

Low-to-moderate steady-state explosions are recorded, accompanied by ash plumes at 4,800 m. asl., traveling 20 km westerly and southwesterly, and with shock waves and sounds of train locomotive.

Ash falls are reported on Panimaché, El Porvenir, Morelia, Santa Sofia, Sangre de Cristo, Finac Palo Verde, and San Pedro Yepocapa.

Fuego - seismogram and RSAM of 06.11.2018 / 8h - Doc.Insivumeh


Incandescent impulses mark the crater, 200-300 meters high, generating avalanches around the crater, impacting the vegetation towards the Seca and Taniluya barrancas, and feeding a 1000 meter long flow, then reaches 1,200 meters in the Ceniza gorge.

The effusive activity then continued until the evening, weakening very slightly.

Sources: Insivumeh & Conred.
 

 Fuego - lava flow 06.11.2018 - image Sentinel 2 bands 16,11,4 - one click to enlarge

Fuego - lava flow 06.11.2018 - image Sentinel 2 bands 16,11,4 - one click to enlarge

 Fuego - thermal anomalies on 07.11.2018 / 3:45 - Doc.Mirova Modis

Fuego - thermal anomalies on 07.11.2018 / 3:45 - Doc.Mirova Modis

In Costa Rica, the Turrialba continues since last week his intermittent eruptions, accompanied by plumes of ash to 500 meters in height.

During the previous night and the morning of November 6, ash emissions continued, with dispersion to the southwest and west. The seismic activity oscillates between moderate and high, characterized by a tremor of great amplitude in relation to the movements of internal fluids.
 

A short phreatic eruption was recorded at Rincon de La Vieja on November 5th at 15:11 local time; it was accompanied by a column of gas and vapor of 100 meters above the crater, dispersing to the west.

According to the Ovsicori, an increase in temperature and hydrothermal fuze content has been observed since 29 October in the waters of the Ojo de Agua Santuarium, located 3.5 km north of the crater.

Sources: Ovsicori and RSN.

Turrialba - 06.11.2018 / 7:45 - RSN webcam

Turrialba - 06.11.2018 / 7:45 - RSN webcam

The activity of Villarica continues this November 6 with strombolian explosions that eject shreds of lava up to 80 meters above the crater, and which fall on the periphery of the latter.

POVI's Werner Keller says the volcano's behavior is similar to that seen in mid-February 2017.

Source: POVI

Villarica - Strombolian activity from 06.11.2018 between 0h50 and 01h44 - Doc.POVI

Villarica - Strombolian activity from 06.11.2018 between 0h50 and 01h44 - Doc.POVI

In recent days, La Reunion has also its Geological Guide (in French).

Presentation by Ludovic Leduc:

"This guide is first and foremost a complete geological history that allows to fix the key notions and moments since the emergence of the island, more than 3 million years ago. ) Ten detailed hikes to see ... and understand ! From Mafate to the Piton de la Fournaise through the Lava road or the Plain of Cafres, we tried to mix pedagogy and beautiful iconography to succeed in making you take the measure of geological phenomena at work on this beautiful island.This is finally seven sheets discovered on topics as varied as volcanic organs, extreme climates of the island or the functioning of the volcanological observatory ...

A must for lovers (or future) of Reunion ! "

Authors: Ludovic Leduc (coordinator), Marie Chaput, Simon Defortis and Olivier Hoarau - 256 pages, 1 geological history, 10 hiking trails and 7 discovery sheets.

Geological Guide of Reunion Island - and its hiking trails - one click to enlarge
Geological Guide of Reunion Island - and its hiking trails - one click to enlargeGeological Guide of Reunion Island - and its hiking trails - one click to enlarge

Geological Guide of Reunion Island - and its hiking trails - one click to enlarge

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