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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
Piton de La Fournaise - lava flow in the Grand Brûlé - photos © Thierry Sluys 13.08.201
Piton de La Fournaise - lava flow in the Grand Brûlé - photos © Thierry Sluys 13.08.201

Piton de La Fournaise - lava flow in the Grand Brûlé - photos © Thierry Sluys 13.08.201

At Piton de La Fournaise, an aerial survey was carried out on Tuesday August 13 with the help of SAG and PGHM. In total there are two eruptive cracks, distant from each other of about 1400 m, which opened on August 11, 2019 in the eastern sector, southeast of the upper part of the Great Slopes at 1700 and 1500 m altitude.
Around 09:30 (local time), only the lowest altitude fissure was active, on which three separate cones formed by accumulation of lava fountains spaterring.
A fumarole zone, not related to an eruptive crack or a lava flow, was observed between the two cracks at about 1100 m altitude.

Piton de La Fournaise - location of cracks - Doc. OVPF

Piton de La Fournaise - location of cracks - Doc. OVPF

Piton de la Fournaise - crack 1 opened on 11.08.2019 at 1700 m altitude but no longer active. - OVPF photo 13.08.2019

Piton de la Fournaise - crack 1 opened on 11.08.2019 at 1700 m altitude but no longer active. - OVPF photo 13.08.2019

The three active flows from these cones meet in a single channel whose front was this morning at 09:30 to 665 m altitude (near the Piton Tremblet), about 2.1 km from the road.

Small fires were observed all along the lower part of the stream, due to its entry into a highly vegetated area.

Piton de La Fournaise - the flows slow down when arriving in the vegetation, and cause fires - photo © Thierry Sluys 13.08.2019

Piton de La Fournaise - the flows slow down when arriving in the vegetation, and cause fires - photo © Thierry Sluys 13.08.2019

Piton de La Fournaise - the lava plays hide-and-seek with the mist - - photo © Thierry Sluys 13.08.2019

Piton de La Fournaise - the lava plays hide-and-seek with the mist - - photo © Thierry Sluys 13.08.2019

Piton de La Fournaise - a thinning reveals the active crack, and the cones of projections - photo © Thierry Sluys 13.08.2019

Piton de La Fournaise - a thinning reveals the active crack, and the cones of projections - photo © Thierry Sluys 13.08.2019

Piton de La Fournaise - the eruption seen from the RN2 and the Grand Brûlé - Doc. Imazpress 13.08.2019

The weather remains capricious during the day on the side of lava road. The weather oscillates between cloudy and clouds ... to see the lava in the Great slopes is random.

This did not prevent the curious from coming and coming back ... traffic jams formed in the evening on Saint-Philippe side and Sainte-Rose side.

 

Sources:

- Thanks to Thierry Sluys, for sharing photos.

- OVPF newsletters and tweets

Find all the information related to the Piton de la Fournaise activity on the different media of the OVPF-IPGP:
- the website (http://www.ipgp.fr/fr/ovpf/actualites-ovpf),
- the Twitter account (https://twitter.com/obsfournaise?lang=en),
- and the facebook account (https://www.facebook.com/ObsVolcanoPitonFournaise/)

- Local media

Ubinas - Period of analysis: 6-12 August 2019 - Doc. IG Peru

Ubinas - Period of analysis: 6-12 August 2019 - Doc. IG Peru

The Geophysical Institute of Peru (IGP) reports that the Ubinas volcano continues its eruptive process. To date, the decrease in seismic activity that would be related to the rise of magma is recorded; however, bluish gas (magmatic gas) and water vapor emissions observed by surveillance cameras continue to be recorded. Moreover, thanks to the satellites, thermal anomalies have been detected which indicate the proximity of the magma to the surface of the crater. Even in this scenario, an explosive activity would be expected in the coming days.

Prospects according to IG Peru:

The increase in volcanic activity is expected in the coming days, with the development of explosions with the expulsion of ballistic bombs and  ash emissions, similar or lower in height and volume than those observed on July 19. The probability of debris avalanche due to the collapse of the south wall of the volcanic building is latent.

The technical alert level remains orange.

 

Source: I.G.Peru - Period of analysis: 6-12 August 2019

Sabancaya - activity between 5 and 11.08.2019 - Doc. IG Peru

Sabancaya - activity between 5 and 11.08.2019 - Doc. IG Peru

At Sabancaya, the eruptive activity of the week from 5 to 11 August is at a moderate level, with an average of 30 explosions per day, accompanied by ash plumes up to 4,000 meters above sea level.

The seismicity is marked by 2,227 earthquakes during this period, and 9 thermal anomalies between 3 and 49 MW.

The activity remains in the framework of the orange technical alert, with a non-accessible area of ​​12 km radius around the volcano.

 

Source: I.G.Peru / CENVUL

Nevados of Chillan - 13.08.2019 / 16:03 webcam OVDAS Porterzuelo

Nevados of Chillan - 13.08.2019 / 16:03 webcam OVDAS Porterzuelo

The Sernageomin / OVDAS reports several explosions at Nevados de Chillan on August 13, respectively at 4:27 local time, 10:58 and 11:16 LT, associated with LP earthquakes, in relation to the dynamics of internal fluids; Incandescence associated with the gases and pyroclastic materials emitted in the vicinity of the crater was observed.

On August 14, two explosions are reported at 0h local time and 2h29 local time, associated with LP earthquakes.

This activity is part of the Orange Volcanic Technical Alert.

 

Source: Sernageomin

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