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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

Video Ovsicori - 07.30.2016 / 1:02

Video thermal camera RSN / Dr.M.Mora 07.30.2016 / 1:02

The activity continues in Turrialba, with an eruption, on July 30 at 1:02; Turbulence and incandescence in the plume is spectacular on the images taken by a thermal camera of the RSN.

As a result of this eruption, supported tremor episodes were recorded between 8 am and 9:30 am, then from 2:19 p.m., continuing until about 5:00 p.m.; they were accompanied by sporadic and passive ash emissions. A plume of gas and water vapor, white, was captured by the webcam at 17:12.

Sources: RSN & Ovsicori

2016.07.26 12:00 Cleveland - vent, that pierces the dome, presents aglow at the thermal camera, while traditional camera view shows a degassing - Photo John Lyons / AVO

2016.07.26 12:00 Cleveland - vent, that pierces the dome, presents aglow at the thermal camera, while traditional camera view shows a degassing - Photo John Lyons / AVO

Instability continued at low level in Cleveland, located in the Aleutian arc.

During the past week, satellites demonstrate high surface temperatures on images taken during periods of clear weather.
An overview of Cleveland on July 26 confirmed the presence of a low lava dome, pierced in its center; glow in this vent confirms the instability of the volcano, justifying the Advisory alert level and the Yellow aviation code.
No significant seismic activity, or infrasound data on last week.

Source: AVO weekly update 07/29/2016

Hawaii / Pu'u O'o - two sea entrances of the lava flow 61G - close up of a photo HVO / USGS

Hawaii / Pu'u O'o - two sea entrances of the lava flow 61G - close up of a photo HVO / USGS

In Hawaii, 61G lava flow continues to pour into the ocean, characterized by two entry points. To the right of the photo, the original entry point dating from July 26, with several incandescent outputs; left, another point corresponds to the extension of an arm of the lava flow.

Between these two points, there is a crack that presage a collapse of the cliff. The lava entering in the ocean form small deltas in addition to rubble at the foot of the cliff. Black sand, formed by the interaction between hot lava and cold water from the ocean, and by wave erosion of the cliff, accumulates along the coast

Source: HVO

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