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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
Etna - situation of the VOR & BN on 06.12.2019 - photo Piero Berti, via J.Nasi / Butterfly Helicopters / INGVvulcani

Etna - situation of the VOR & BN on 06.12.2019 - photo Piero Berti, via J.Nasi / Butterfly Helicopters / INGVvulcani

Etna - situation of the VOR & BN on 06.12.2019 - photo Piero Berti, via J.Nasi / Butterfly Helicopters / INGVvulcani

Etna - situation of the VOR & BN on 06.12.2019 - photo Piero Berti, via J.Nasi / Butterfly Helicopters / INGVvulcani

At Etna, since the 6th of December in the morning, a Strombolian activity marks the Voragine and a new lava flow is observed from the base of the cone of slag located in this crater; lava waterfall in the Bocca Nuova. INGV reports that this phenomenon has already been observed on 18-20 September2019.

An explosion is recorded by the thermal camera at the eastern mouth of the new southeastern crater / NSEC.

 Etna - Hot spots at crater NE, Bocca Nuova and Voragine; low spot at NSEC - Sentinel-2 L1C image on 2019-12-04 bands 12,11,4

 Etna - Hot spots at crater NE, Bocca Nuova and Voragine; low spot at NSEC - Sentinel-2 L1C image on 2019-12-04 bands 12,11,4

Etna NSEC - 06.12.2019 / 09:28 - Etna Webcam therm EMOT - INGV OE

Etna NSEC - 06.12.2019 / 09:28 - Etna Webcam therm EMOT - INGV OE

From 18:00 UTC, CCTV cameras show a gradual intensification of strombolian activity at the New Southeast Crater, which has already manifested itself since 16:00 UTC with weak and discontinuous explosions. The activity produces, for the moment, the fallout of incandescent material along the slope of the cone.

An increase in the tremor is observed around 22:10 local.

 

Sources: INGV vulcani and Piero Berti photos (aka Joseph Nasi), Butterfly Helicopters s.r.l.

Etna - Strombolian activity 06.12.2019 / 19h34 at NSEC (right) and weaker explosions at Voragine (left) - photo INGVvulcani

Etna - Strombolian activity 06.12.2019 / 19h34 at NSEC (right) and weaker explosions at Voragine (left) - photo INGVvulcani

Etna - thermal anomalies on 07.12.2019 / 01h10 - Doc. Mirova Modis

Etna - thermal anomalies on 07.12.2019 / 01h10 - Doc. Mirova Modis

 Etna - tremor at 07.12.2019 - Doc. INGV OE

Etna - tremor at 07.12.2019 - Doc. INGV OE

In the Izu-Bonain Volcanic Arc, the Nishinoshima Volcano, which has been calm since July 2018, has recovered explosive-effusive activity since 4 December 2019.

The explosions are located at the main cone, and a vent that opened at the NE base of the cone produces spaterring and lava flows.

This activity, in addition to the thermal anomalies recorded by satellite, was observed on December 6 during an overflight by the Japanese coastguard.

 

Sources: Japan Coast Guards, JMA and Mirova

Nishinoshima - 06.12.2019 - photo Japan Coast Guards

Nishinoshima - 06.12.2019 - photo Japan Coast Guards

Nishinoshima - 06.12.2019 - photo Japan Coast Guards

Nishinoshima - 06.12.2019 - photo Japan Coast Guards

In Indonesia, the Karangetang South Crater shows sustained activity, with incandescent projections at 50 m height. The lava descends towards Kali Batang and West Beha until about 800 - 1000 m, until Kali Sense, Nanitu, Sesepe and Pangi, until about 1000 - 1500 m.

Le cratère nord est lui aussi actif et présente de l'incandescence.

Karangetang - image Sentinel-2 bands 12,11,4 from 05.12.2019

Karangetang - image Sentinel-2 bands 12,11,4 from 05.12.2019

 Karangetang - Thermal anomalies at 07.12.2019 / 5.25 - Doc. Mirova_MODIS_Latest10NTI

 Karangetang - Thermal anomalies at 07.12.2019 / 5.25 - Doc. Mirova_MODIS_Latest10NTI

Le PVMBG renseigne pour ce 5 décembre :

87 séismes d’avalanches
13 séismes liés aux explosions .
2  séismes Hybride
10 tremblements de terre volcaniques peu profonds
1 tremblement de terre volcanique
1 séisme ressenti (échelle 1 MMI)
5 grands séismes tectoniques
2 épisode de trémor harmoniques
et du Tremor continu, d'amplitude 0,5-7 mm (valeur dominante 5 mm).

 

Sources : PVMBG, Mirova et Sentinel-2

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