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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
Fernandina - plumes and lava flows of June 16, 2018 - photo Esteban Chavez via Prof.Dr.Th.Toulkeridis

Fernandina - plumes and lava flows of June 16, 2018 - photo Esteban Chavez via Prof.Dr.Th.Toulkeridis

In the Galapagos archipelago, nine earthquakes marked the outskirts of Fernandina Island on June 16, from 8:37 am; the largest at 9:22 am TG was of magnitude 4.1 and a depth of 4 km.

The seismic swarm preceded the eruptive activity that began between 11h and 11h15, confirmed by a boat passing to the Galapagos National Park.

Located on the NNE side of the volcano, the eruption is characterized for the moment by lava flows, and gas plumes 2-3 km high.

The entrance to the lava at sea generates a powerful plume of steam and gas.

Sources: IGEPN & Galapagos National Park.

Fernandina - satellite images from 16.06.2018, with on the left, the thermal anomaly on the NNE flank and on the right, the gas plume towards the SO - Doc.IGEPN

Fernandina - satellite images from 16.06.2018, with on the left, the thermal anomaly on the NNE flank and on the right, the gas plume towards the SO - Doc.IGEPN

Fernandina - Lava flows on the flank NNE - photo 16.06.2018 John Garate and Eduardo Alba via Prof.Dr. Th.Toulkeridis 2

Fernandina - Lava flows on the flank NNE - photo 16.06.2018 John Garate and Eduardo Alba via Prof.Dr. Th.Toulkeridis 2

A strong explosive eruption occurred on June 16 at 7:19 am local to the Sakurajima Minamidake Crater on Kyushu Island, Japan.

It was accompanied by an ash plume rising to 4,700 meters above the crater, before drifting to the west.

Pyroclastic flows have been observed down the southwest flank.

Significant ash falls are reported on Kagoshima.

The alert level is maintained at 3 / do not approach the volcano, in force since February 5, 2016.

 

Source: JMA, Kiodo news

Sakurajima - 16.06.2018 / around 7h19 loc. - ash plume and pyroclastic flows - photo Tomoaki Iwakiri and unknown source / Twitter
Sakurajima - 16.06.2018 / around 7h19 loc. - ash plume and pyroclastic flows - photo Tomoaki Iwakiri and unknown source / Twitter

Sakurajima - 16.06.2018 / around 7h19 loc. - ash plume and pyroclastic flows - photo Tomoaki Iwakiri and unknown source / Twitter

Sakurajima - ashes from the eruption on Kagoshima on 16.06.2018 - photo せ ば / Twitter

Sakurajima - ashes from the eruption on Kagoshima on 16.06.2018 - photo せ ば / Twitter

At Kilauea, the eruption continues in the East Rift Zone, where lava fountains rise between 55 and 60 meters on crack 8, surrounded by a 51-meter spatter and tephra cone at its highest point.

The lava flows into a well-established channel towards the ocean at Kapoho, producing "laze" plumes, loaded with hydrochloric acid and volcanic particles.

Fissures 16 and 18 continue to seep out of the lava.

Fisures 9 and 24 appear hotter, and degass strongly.

Kilauea East rift zone - the spatter cone and tephra is 51 m high at its highest point -  The steam in the foreground is the result of heavy morning rain falling on warm (not hot) tephra (lava fragments). - HVO-USGS photo 16.06.2018

Kilauea East rift zone - the spatter cone and tephra is 51 m high at its highest point -  The steam in the foreground is the result of heavy morning rain falling on warm (not hot) tephra (lava fragments). - HVO-USGS photo 16.06.2018

Kilauea East rift zone - Structured appearance of the channeled lava flow - photo 15.06.2018 / Bruce Omori

Kilauea East rift zone - Structured appearance of the channeled lava flow - photo 15.06.2018 / Bruce Omori

Kilauea East rift zone - the meeting between the lava and the ocean produces plumes of "laze" - photo HVO-USGS

Kilauea East rift zone - the meeting between the lava and the ocean produces plumes of "laze" - photo HVO-USGS

Seismicity is rising at the top, where several earthquakes have been felt, some of magnitude 3.

The collapse of the edges and walls of Halema'uma'u continues in response to the current subsidence of the summit.

Source: HVO-USGS

A moderate explosion was observed on June 15 from 21:38 UTC at Klyuchevskoy, accompanied by a plume of ash rising to more than 6,000 meters asl., then drifting southwest of the volcano.

Moderate activity continues, justifying an orange aviation code, the risk of ash explosions always occurring.

Source: KVERT

 Klyuchevskoy - plume and lenticular cloud- photo KVERT / 24.04.2017

 Klyuchevskoy - plume and lenticular cloud- photo KVERT / 24.04.2017

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