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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
 Tinakula - image ISS002-E-6386 NASA

Tinakula - image ISS002-E-6386 NASA

The eruption of Tinakula remains poorly documented.

On a Landsat 8 satellite image dated 21.10.2017, we can see the thermal signature of a lava flow towards the avalanche caldera breaching the western slope of the volcano.

Two images, provided by Planetlabs on 9 September and 22 October respectively, show that volcanic ash covers the island and that a new pyroclastic delta has formed on the north-west coast.

Sources: Landsat 8; Planetlabs; Simon Carn; Gamara Okzman Bencarson

Tinakula - 23.10.2017 - photo Gamara Okzman Bencarson / Twitter / Facebook

Tinakula - 23.10.2017 - photo Gamara Okzman Bencarson / Twitter / Facebook

Tinakula - 23.10.2017 - photo Gamara Okzman Bencarson / Twitter / Facebook

Tinakula - 23.10.2017 - photo Gamara Okzman Bencarson / Twitter / Facebook

Stromboli - big explosion on 23.10.2017 / 14h04 GMT - Laboratorio Geofisica Sperimentale

Stromboli - big explosion on 23.10.2017 / 14h04 GMT - Laboratorio Geofisica Sperimentale

Stromboli - seismogram of the explosion of 23.10.2017 / 14h04 GMT - Doc. INGV Catania

Stromboli - seismogram of the explosion of 23.10.2017 / 14h04 GMT - Doc. INGV Catania

A strong explosion rocked Stromboli on October 23, 2017 at 16:40 local, accompanied by the emission of bombs that fell on a large area around the craters, including the point of view of Pizzo. Fortunately no one was present there at the time of the explosion, which occurred without significant warning signs ... Stromboli can be dangerous, even in times of relatively low activity.

Sources: Volcanodiscovery; Laboratorio Geofisica Sperimentale; INGV Catania

Stromboli - the explosion on the webcam on 23.10.2017 / 14:04 - webcam INGV

Stromboli - the explosion on the webcam on 23.10.2017 / 14:04 - webcam INGV

During the week of October 16 to 22, 2017, explosive activity increased in Sabancaya, with an average of 47 episodes per day.

Seismicity remains dominated by LP earthquakes, in relation to fluid movements; the tremor, linked to ash emissions, is also increasing.

The eruptive plumes have reached a max. of 3,800 meters above the crater, with a scattering of ashes to a large eastern area about 60 km.

The sulfur dioxide flux peaks at 2,196 tonnes / day on October 16th.

Four thermal anomalies, between 2 and 31 MW, were recorded by Mirova.

Source: IGPeru / OVI / Ingemmet

Sabancaya - summary table of activity between 16 and 22.10.2017 - doc.IGPeru / OVI / Ingemmet

Sabancaya - summary table of activity between 16 and 22.10.2017 - doc.IGPeru / OVI / Ingemmet

Sabancaya - fluctuating thermal anomalies up to 31 MW - Doc. Mirova Modis

Sabancaya - fluctuating thermal anomalies up to 31 MW - Doc. Mirova Modis

At the Agung, visibility has allow to see steam and gas plumes between 200 and 500 meters above the summit.

The seismicity has decreased, while remaining important:

- on October 22nd, the PVMBG reports 122 VA deep volcanic earthquakes, 62 VB superficial volcanic earthquakes, and 9 local tectonic earthquakes.

- On October 23, there were 4 episodes of non-harmonic tremor, 154 VA earthquakes, 53 VB earthquakes and 11 local tectonic earthquakes.

Sources: PVMBG; Magma Indonesia.

 Agung - steam plume on 23.10.2017 / 12h10 - photo PVMBG / Magma Indonesia

Agung - steam plume on 23.10.2017 / 12h10 - photo PVMBG / Magma Indonesia

 Agung - summary histogram of seismicity at 23.10.2017 - Doc. Magma Indonesia

Agung - summary histogram of seismicity at 23.10.2017 - Doc. Magma Indonesia

Commenter cet article

Shana lilie 25/10/2017 01:49

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Mélina 24/10/2017 15:48

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