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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
Manam - the eruption seen by the satellite Landsat-8 OLI on 22.04.2017 - Photo USGS / Landsat-8 OLI

Manam - the eruption seen by the satellite Landsat-8 OLI on 22.04.2017 - Photo USGS / Landsat-8 OLI

The eruption of Manam continues in PNG, with a warning level three ... which corresponds to the evacuation of the inhabitants towards Bogia.


Sources:
- Radio NZ Pacific news - link
- USGS Landsat-8 OLI

Manam - high thermal anomaly on 26.04.2017 / 1.30 pm - Doc. Mirova MODIS_VRP

Manam - high thermal anomaly on 26.04.2017 / 1.30 pm - Doc. Mirova MODIS_VRP

Two eruptions animated the Showa crater of Sakurajima on the morning of April 26, for the first time at this vent since last July. The first, at 5:11 am, was accompanied by a plume rising to 1,700 meters above the crater. The second, at 5:37, generated a plume of 1,500 meters.
Three eruptions were still observed at the Nantake crater.
The alert level remains set at 3 on a scale of 5 since February 2016.


Source: MBC News - link to video

Nishinoshima - an overview of the 25.04.2017 shows the activity spread over three craters - photo The Japan News / The Yomiuri Shimbun

Nishinoshima - an overview of the 25.04.2017 shows the activity spread over three craters - photo The Japan News / The Yomiuri Shimbun

On Nishinoshima, an overflight on April 25 by an Yomiuri Shimbun aircraft confirms that the lava has reached the western coast of the cone. Another lava flow is observed on the south side. Two new craters were formed, a sign of a great activity, which could spread the volcano island a little more.
 
Source: The Japan News / The Yomiuri Shimbun

Etna - lava flow on the southern slope, from the observatory on 27.04.2017 at dawn - photo Boris Behncke

Etna - lava flow on the southern slope, from the observatory on 27.04.2017 at dawn - photo Boris Behncke

At Etna, around 6 pm on April 26, a new effusion of lava was resumed at the vent located on the southern slope of the southeast cone.
Activity increased during the night, becoming strombolian. Around 5:40, on the 27th, a lava fountain was visible, feeding a stream in the direction of the Valle del Bove.
A fissure, appeared on the northern wall of the southeast crater, fed a second flow in a northeasterly direction.
The activity thus concerns four events, at least, and generates two lava flows3


Sources: Boris Behncke, EtNative / Fabricio Zuccarello, Alessandro Lo Piccolo, INGV Catania and the different webcams

Etna - 27.04.2017 / 6.09 and 8.13 loc. - one click to enlarge - webcams INGV Catania Etna Etna - 27.04.2017 / 6.09 and 8.13 loc. - one click to enlarge - webcams INGV Catania Etna 

Etna - 27.04.2017 / 6.09 and 8.13 loc. - one click to enlarge - webcams INGV Catania Etna 

Etna - curve of the tremor on 27.04.2017 at 6.10 am - doc. INGV Catania

Etna - curve of the tremor on 27.04.2017 at 6.10 am - doc. INGV Catania

In Costa Rica, small phreatic eruptions have been recorded in the last 24 hours in Poas.
The seismicity is characterized by a low amplitude, quasi-constant tremor, and LPS and volcano-tectonic earthquakes, one of magnitude 2.7. A vigorous plume of gas, steam and aerosols rises from the crater and rises to about 1,000 meters in height.

 

Poas - phreatic episode on the 25.04.2017 / 14h10 - photo Ovsicori

Poas - phreatic episode on the 25.04.2017 / 14h10 - photo Ovsicori

Poas - the ashes of the eruptions cover the vegetation - photos CNEmergencia and RSN the 25.04.2017
Poas - the ashes of the eruptions cover the vegetation - photos CNEmergencia and RSN the 25.04.2017

Poas - the ashes of the eruptions cover the vegetation - photos CNEmergencia and RSN the 25.04.2017

In Turrialba, the degassing remains passive but persistent, with a plume rising between 500 and 1,000 meters above the active crater, dispersing towards the south, and the occasional emission of small quantities of fine ash.


Source: Ovsicori-UNA

Turrialba - plume of water vapor, aerosols and gas on 26.04.2017 / 7h - webcam Ovsicori

Turrialba - plume of water vapor, aerosols and gas on 26.04.2017 / 7h - webcam Ovsicori

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