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Earth of fire

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

Publié par Bernard Duyck
Publié dans : #Actualités volcaniques
  Piton de la Fournaise - the summit craters within the Enclos - photo Living Planet

Piton de la Fournaise - the summit craters within the Enclos - photo Living Planet

Alert 1 / probable eruption in Piton de La Fournaise:

The prefecture of La Réunion implemented the alert phase of Orsec Plan / 
probable eruption to the Piton de La Fournaise from this July 6 to 14 hours, which implies a prohibition of access to the upper part of Enclos and the landing of helicopters.

The Volcano Observatory recorded since July 6 to 12 pm. "An increase in the number of low-intensity earthquakes located below the top of shallow volcano (91 earthquakes of magnitude 0.5 to 1 at a depth of about 1,500 m. Below the top) and a persistent deformation (inflation ) on the northern edge of the crater "

The evacuation of hikers is outstanding under the control of the Force. Note that the vigilance phase of the volcano emergency plan was still in force since June 5 and the public access restricted to three paths: the Pas de Bellecombe / crater Kapor, Pas de Bellecombe / Chapelle de Rosemont and Rosemont Chapel / Observation Site of Dolomieu crater.

Sources:

Sources :

- Préfecture de La Réunion - Piton de la Fournaise : passage en alerte 1 éruption probable - link

- médias : LINFO. Re & Clicanoo.re

Piton de la Fournaise - authorized trails before 07/06/15 - Doc. 974 News weather

Piton de la Fournaise - authorized trails before 07/06/15 - Doc. 974 News weather

In Colombia, the Nevado del Ruiz has since the morning of July 6, volcanic tremor.

Web cameras recorded a plume charged in ash amount to 1,800 meters, with a possible impact on the Chinchina, Villamaria, Manizales and Pereira sectors.

Source: CMS / y Observatorio Vulcanologico Sismologico Manizales.

 

Nevado del Ruiz - pictures from webcams - 06/07/2015 - Doc. CMS /  Observatorio Vulcanologico y Sismologico de Manizales.

Nevado del Ruiz - pictures from webcams - 06/07/2015 - Doc. CMS / Observatorio Vulcanologico y Sismologico de Manizales.

Nishinoshima: opening of a new crater

The research ship "Akihiro", in the area, note the changes in the volcanic activity of the island-volcano.

A new crater formed on the northeast slope of the active cone.
The plume that characterized the summit crater end of June is no more present, and white fumaroles appeared on a northeast side fissure and covering the new crater.

(Subject to an accurate translation of the report of the Japan Coast Guards -
link)

Source : Japan Coast Guards / 06.07.2015 - link
 

Source : Japan Coast Guards / 06.07.2015 - link  Nishinoshima 06/07/2015 - photo from the video TBS News-i

Source : Japan Coast Guards / 06.07.2015 - link Nishinoshima 06/07/2015 - photo from the video TBS News-i

Video TBS News-i / 07.06.2015

For comparison, Nishinoshima on 18.06.2015 (the plume of the active cone, and dotted, the hot spot of the lava flows) - photo Japan Coast Guards

For comparison, Nishinoshima on 18.06.2015 (the plume of the active cone, and dotted, the hot spot of the lava flows) - photo Japan Coast Guards

A false-color image (top) was acquired on June 21, 2015, by the Operational Land Imager (OLI) on Landsat 8. It combines shortwave infrared, near infrared, and green light (OLI bands 7-5-3). With this band combination, the plume of steam and sulfur dioxide appears white. Sea water is navy blue, and hot spots of lava are red. The lava is flowing toward the southeast part of the island through tubes that prevent OLI from detecting it until it emerges in a lava delta at the edge of the island. The natural-color image (below) was acquired by OLI at the same time as the image above. That band combination allows for an image with higher spatial resolution.

A false-color image (top) was acquired on June 21, 2015, by the Operational Land Imager (OLI) on Landsat 8. It combines shortwave infrared, near infrared, and green light (OLI bands 7-5-3). With this band combination, the plume of steam and sulfur dioxide appears white. Sea water is navy blue, and hot spots of lava are red. The lava is flowing toward the southeast part of the island through tubes that prevent OLI from detecting it until it emerges in a lava delta at the edge of the island. The natural-color image (below) was acquired by OLI at the same time as the image above. That band combination allows for an image with higher spatial resolution.

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