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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
 Turrialba - eruption of 05/08/2016 / 8:05 - photo webcam RSN

Turrialba - eruption of 05/08/2016 / 8:05 - photo webcam RSN

In Turrialba, the day of May 7 was characterized by a strong steaming, pf water vapor, magmatic gas and volcanic aerosols forming a white plume 1,000 meters above the crater.

Due to heavy rain, small lahars down the ravines were affecting rios Aquiares and Reventazon.

Seismicity level, continuous high amplitude tremor was recorded on May 7 from 5:30 am to 17h. On May 8, the spasmodic tremor, associated with the gas eruption and small amounts of ash is recorded from 2am. Ash fumes are visible on the webcams at 5:28, 6:10 and from 7:30 to 7:40. A eruption is maintained between 8:04 and 8:11

Source: Red Nacional seismology and Ovsicori

 

Ruapehu's crater lake - 05.07.2016 - photo Taupos Floatplane

Ruapehu's crater lake - 05.07.2016 - photo Taupos Floatplane

 In New Zealand, during an overview of Ruapehu on May 7 to 14 pm, it was observed strong degassing at the lake, and bubbles bursting its surface. The temperature of the lake reached 44 ° C, the highest temperature recorded since the establishment of the new crater lake after 2000.

Seismic swarms stopped, but the tremor continues, linked to both magmatic and hydrothermal process; it does not necessarily indicate a future eruption.

On May 9, GeoNet says nothing special, the lake smoking more than slightly.

The alert level remains at 1 and the aviation code in Green

Sources : GeoNet
 

White Island - 02.05.2016 / 4:21 p.m. - thermal image of the crater floor / GeoNet

White Island - 02.05.2016 / 4:21 p.m. - thermal image of the crater floor / GeoNet

Since the phreatic eruption of April 27, seismicity has gradually decreased to White Island; accordingly, the alert level was reduced to 1, and the aviation code to Yellow.

Field analyzes refer to hot pyroclastic surge deposits, which is moved horizontally above the crater floor; the very dry crumble like texture indicates that deposits were made hot.
The thermal images were used to determine the location of the new vent, and the location of major collapses in the area of ​​Donald Duck Crater

Source: GeoNet and Dino of White Island

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