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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 : #volcanic activity
Sabancaya - gas and ash plume from 25.07.2019 / 13h44 - webcam IGP

Sabancaya - gas and ash plume from 25.07.2019 / 13h44 - webcam IGP

In Peru, an explosion was recorded on 25 July at 13:41 in Sabancaya; it was accompanied by a plume of ash and gas reaching 3,000 meters. The ashes drifted to the northeast.

 

Sources: IG Peru and ICCSV

Pacaya - 2019.07 infographic of the current activity of the volcano - Insivumeh

Pacaya - 2019.07 infographic of the current activity of the volcano - Insivumeh

The Pacaya presented on July 25 a degassing of moderate height, 150 meters above the crater, dispersing towards the south. Lava flows move on the north flank, and generate small avalanches of blocks at the front of flows

 

Sources: Insivumeh & Conred

Pacaya - small degassing on 25.07.2019 - Insivumeh photo

Pacaya - small degassing on 25.07.2019 - Insivumeh photo

On Kyushu in Japan, small intermittent ash emissions are reported on July 25th and 26th, associated with the groundwater activity of the Asosan / Nakadake crater.

The plume of the July 26 episode at 7:57 am climbed to an altitude of 1,600 meters!

 

Sources: JMA, RSOE, VAAC Tokyo

Asosan - plume of the phreatic episode of 26.07.2019 - camera Aso Museum

Asosan - plume of the phreatic episode of 26.07.2019 - camera Aso Museum

An overflight of Villarica on July 25 confirms the presence of a lava lake at the summit, at a depth less than that of previous days. The presence of ballistic pyroclasts around the crater justifies the respect of an affected zone of 500 meters radius around the crater.

 

Source: Sernageomin

Villarica - lava lake in the summit crater on 25.07.2019 - phoio fly over Sernageomin

Villarica - lava lake in the summit crater on 25.07.2019 - phoio fly over Sernageomin

Villarica - incandescence and night activity on 24.07.2019 - photo Daniel Sepúlveda / Twitter

Villarica - incandescence and night activity on 24.07.2019 - photo Daniel Sepúlveda / Twitter

The last activity report of Mauna Loa of 25 July / 20h14 UTC confirms for the past week high deformation and seismicity ratios. The Mauna Loa is not erupting, but the Volcano is Advisory and the Yellow Aviation Code.

GPS and InSAR measurements show continued peak inflation, suggesting a recharge of the superficial magma storage system.

At the seismicity level, 75 earthquakes, mostly of magnitude less than 2.0, occurred during the week under the summit zone and the upper southwest rift zone, at a depth of less than 5 km.

No change in Sulfur degassing cone over the southwest rift zone was measured.

The temperature of the fumaroles, both in the Sulfur cone and at the summit, remains unchanged.

 

Source: HVO

Mauna Loa - graph. of the Tiltmeter at the top between 19 and 26.07.2019 - Doc. HVO

Mauna Loa - graph. of the Tiltmeter at the top between 19 and 26.07.2019 - Doc. HVO

Mauna Loa - Seismicity on 26.07.2019 - number of daily and cumulative (red line) , and their depth and magnitude - Doc. HVO
Mauna Loa - Seismicity on 26.07.2019 - number of daily and cumulative (red line) , and their depth and magnitude - Doc. HVO

Mauna Loa - Seismicity on 26.07.2019 - number of daily and cumulative (red line) , and their depth and magnitude - Doc. HVO

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