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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

An eruptive episode marked the Agung, on the island of Bali, on June 27 at 22h21 local; the ash emission formed a thick plume observed at about 2,000 meters above the summit (5,142 meters asl), before drifting westward.

Seismicity is dominated by volcanic earthquakes and harmonic tremors.

On June 28, there is still a small gray-white plume rising 500 meters above the summit.

Update:
Around 10:30, the emissions were reinforced, accompanied by a plume of ash and gas up to 2,000 meters, and fallout on Puregai 7 km from the summit. Since 12:30, low frequency tremor related to ash and gas emissions have become continuous.
Satellite images from June 28 in the morning show a hot spot on the surface of the crater likely corresponding to an effusion during the night
At 18:00 WITA, the programs continue. An orange VONA has been in effect since 15:01 WITA
The alert level remains unchanged at 3, with a prohibited area of 4 km radius.

Source : PVMBG & Magma Indonesia 

Agung - eruptive plume of 27.06.2018 / 22:26 WIB - webcam PVMBG

Agung - eruptive plume of 27.06.2018 / 22:26 WIB - webcam PVMBG

Agung - emission of gas and some ash 28.06.2018 / 10:43 WIB - webcam PVMBG

Agung - emission of gas and some ash 28.06.2018 / 10:43 WIB - webcam PVMBG

Agung - emission of gas and some ash 28.06.2018 / 15:52 WIB - Photo Magma Indonesia

Agung - emission of gas and some ash 28.06.2018 / 15:52 WIB - Photo Magma Indonesia

Agung - trajectory of the ash cloud to the west then the southwest, saving the airport which remains open - image Citra Himawari 28.06.2018 / 16h

Agung - trajectory of the ash cloud to the west then the southwest, saving the airport which remains open - image Citra Himawari 28.06.2018 / 16h

Agung - emission of gas and some ash 28.06.2018 / 17:59 WIB - Photo Magma Indonesia

Agung - emission of gas and some ash 28.06.2018 / 17:59 WIB - Photo Magma Indonesia

A punctual emission of gas and ashes affected the Shinmoedake / Kirishima group this 27th of June at 15:34 local; the plume has reached an altitude of 2,200 meters.

The alert level remains at 3 out of 5, and it is recommended not to approach the volcano.

Source: JMA

Kadovar - image Sentinel 2 SWIR 14.06.2018

Kadovar - image Sentinel 2 SWIR 14.06.2018

Little news of the Kadovar eruption in Papua New Guinea since early February.

According to Rabaul Volcano Observatory, volcanic activity has been declining despite continuous eruptions.

A clear photo of Sentinel 2, June 14, shows two weak plumes and a hot spot at the coastal vent.

An Instagram photo from June 27 (?) shows a well developed coastal dome degassing gently, and a fairly large gray-white summit plume leaning westward.

Sources: Sentinel 2 and Instagram photo via Shérine France

 Kadovar - photo Shari Kalt / Instagram / 27.06.2018 (?) - via Shérine France

 Kadovar - photo Shari Kalt / Instagram / 27.06.2018 (?) - via Shérine France

The activity of the last 12 hours in Sierra Negra / Galapagos is characterized by a gradual decrease in seismic and acoustic tremor, but these signals nevertheless indicate the continuation of the eruption with a lower intensity.

One hundred and two volcano-tectonic earthquakes have been recorded; the largest, with a magnitude of 3.3, is located south of the caldera at a depth of 4.3 km. The others are located at a shallower depth, and in the western part of the caldera.

Source: IGEPN

Sierra Negra - fissure eruption, lava flows and eruptive plumes - photo © Xavier García 26.06.2018

Sierra Negra - fissure eruption, lava flows and eruptive plumes - photo © Xavier García 26.06.2018

Sierra Negra - seismogram of 26.06.2018, illustrating the M5.6 earthquake, the pre-eruptive swarm and the tremor accompanying the eruption - Doc IG

Sierra Negra - seismogram of 26.06.2018, illustrating the M5.6 earthquake, the pre-eruptive swarm and the tremor accompanying the eruption - Doc IG

Summary of the eruption of 26.06.2018 by Dr. Benjamin Bernard / IGEPN

Summary of the eruption of 26.06.2018 / via Earthquakes time

Kilauea East rift zone - 27.06.2018 - lava fountains in spatter cone on fissure 8 and large volumes of sulfur dioxide producing haze - photo Bruce omori / Paradise helicopters

Kilauea East rift zone - 27.06.2018 - lava fountains in spatter cone on fissure 8 and large volumes of sulfur dioxide producing haze - photo Bruce omori / Paradise helicopters

At Kilauea, the eruption in the East Rift Zone, mainly fueled by fountaining on fissure 8, continues to produce impressive volumes of lava.

Kilauea East rift zone - 27.06.2018 - shoreline changes where various structures were covered by lava - photo Bruce omori / Paradise helicopters

Kilauea East rift zone - 27.06.2018 - shoreline changes where various structures were covered by lava - photo Bruce omori / Paradise helicopters

Kilauea East rift zone - 27.06.2018 - the active flow is 800 m away from Ahalanui Beach Park. - photo Bruce omori / Paradise helicopters

Kilauea East rift zone - 27.06.2018 - the active flow is 800 m away from Ahalanui Beach Park. - photo Bruce omori / Paradise helicopters

While the channelized lava flow remains stable between Leilani Estates and Noni Farms rd., the lower section shows changes: a slowdown under the Kapoho crater sent lava laterally, which covered the new black sand beach, a cove and filled the small green and blue ponds formed for two weeks. Floods threaten homes and the beach area north of the stream, while widening south. The coastline is constantly changing.

The active flow is about 800 meters from Ahalanui Beach Park.

At the top, the situation remains unchanged

Sources: HVO-USGS and Bruce Omori

Changes to the summit crater of Kilauea - Video drone USGS 24.06.2018

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