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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 : #Actualités volcaniques
The Nevados complex of Chillan - photo 14.07.2018 P.S.Miranda via Cristian Farias / Twitter

The Nevados complex of Chillan - photo 14.07.2018 P.S.Miranda via Cristian Farias / Twitter

An explosion marked the Nevados de Chillan complex this July 15 at 3:24 local / 7:24 GMT.

An incandescent column about 340 meters high accompanied this explosion, propelling an abundant material that was deposited on the NNE flank near the active crater.

An earthquake with a local magnitude of 3.8 and a depth of 1,800 meters associated with the explosion and dynamics of fluids within the volcanic system was recorded.

The activity has been rising for a few days: on July 14, an explosion is recorded at 15:30 local, associated with an earthquake of Ml 3,9 to 1,400 meters deep; and on July 13, at 20:55 local, associated with an earthquake of Ml 3.7 and a depth of 430 meters.

These events suggest a scenario of increasing the level of activity.

For the moment, the volcanic alert remains in Naranja, and in Amarilla for three communes close to the volcano, San Fabián, Coihueco and Pinto, for the Civil protection,

 

Source: Sernageomin & Onemi
 

Nevados de Chillan - explosion earthquake of 14.07.2018 - and remains of the explosion on the snow of the summit / Volcanes de Chile
Nevados de Chillan - explosion earthquake of 14.07.2018 - and remains of the explosion on the snow of the summit / Volcanes de Chile

Nevados de Chillan - explosion earthquake of 14.07.2018 - and remains of the explosion on the snow of the summit / Volcanes de Chile

 The Nevados de Chillan - photo 15.07.2018 via Cristian Farias / Twitter

The Nevados de Chillan - photo 15.07.2018 via Cristian Farias / Twitter

Nevados de Chillan complex - Map of potential danger zones updated on 15.07.2018 - Sernageomin

Nevados de Chillan complex - Map of potential danger zones updated on 15.07.2018 - Sernageomin

Nevados de Chillan Complex - Map of evacuation routes in case of eruption for the villages of San Fabián, Coihueco and Pinto - Sernageomin

Nevados de Chillan Complex - Map of evacuation routes in case of eruption for the villages of San Fabián, Coihueco and Pinto - Sernageomin

In Kilauea, the situation is stable at the level of sea entrances, the lava enters, without visible connections on the surface, at various points of the casting front over 6 km.

The southern edge of the stream, for the moment at 1 km from Isaac Hale Park, threatens a surf spot in Bowls / Pohoiki; if the movement continues at the current standards, Pohoiki should be impacted in less than a week.

Source: HVO-USGS & Local Media.

Kilauea East rift zone - the seas entering the sea are getting closer to the Poihiki / Bowls surf spot - photo 15.07.2018 Ikaika Marzo / Hot seat Hawaii

Kilauea East rift zone - the seas entering the sea are getting closer to the Poihiki / Bowls surf spot - photo 15.07.2018 Ikaika Marzo / Hot seat Hawaii

Kilauea East rift zone - Campbell ponds - photo Ikaika Marzo via Hot seat 15.07.2018

Kilauea East rift zone - Campbell ponds - photo Ikaika Marzo via Hot seat 15.07.2018

Kilauea East rift zone - image natural colors and short waves / IR Sentinel2 / Big data of the lava flow and ocean entries - Doc.12.07.2018 Big data / Sentinel

Kilauea East rift zone - image natural colors and short waves / IR Sentinel2 / Big data of the lava flow and ocean entries - Doc.12.07.2018 Big data / Sentinel

Kilauea East Rift Zone - East side Thermal map of flow and Sea Entries - Doc.14.07.2018 / 6h USGS

Kilauea East Rift Zone - East side Thermal map of flow and Sea Entries - Doc.14.07.2018 / 6h USGS

In Pacaya / Guatemala, an increase in Strombolian activity has been noticed for months. Explosions propel materials to 15-75 meters in height.

A lava flow on the north-northeast flank reaches a length of 400 meters on July 15, and particles break away from it to be blown away by the winds, as well as small avalanches are observed in a similar direction.

Pacaya - doc.Insivumeh 15.07.2018


Source: Insivumeh special bulletin 15.07.2018 / 22.15 local
 

The Vanuatu observatory does not give too much news of the situation on Ambae.

One can only fall back on the information of thermal anomalies given by Mirova, which indicates thermal anomalies of end of June-beginning of July and 08-10.07, and on the images of the satellite Sentinel 2.

The comparison of the 19.05.2018 and 13.07.2018 images makes it possible to verify morphological changes, with almost complete filling of the western part of Lake Manaro Voui, which leaves only a small surface of water south of the active cone. .

Sources: Mirova and Sentinel2

Ambae / Aoba - recent thermal anomalies - Doc.Mirova Modis at 16.07.2018

Ambae / Aoba - recent thermal anomalies - Doc.Mirova Modis at 16.07.2018

Ambae - Eruptive site of Lake Voui - 19.05.2018 - Image Sentinel Hub nat. colors

Ambae - Eruptive site of Lake Voui - 19.05.2018 - Image Sentinel Hub nat. colors

Ambae - Eruptive site of Lake Voui - 13.07.2018 - Image Sentinel Hub nat. colors (zoom) and SWIR (general view)
Ambae - Eruptive site of Lake Voui - 13.07.2018 - Image Sentinel Hub nat. colors (zoom) and SWIR (general view)

Ambae - Eruptive site of Lake Voui - 13.07.2018 - Image Sentinel Hub nat. colors (zoom) and SWIR (general view)

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