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Earth of fire

Actualité volcanique, Articles de fond sur étude de volcan, tectonique, récits et photos de voyage

Articles avec #actualites volcaniques catégorie

Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques

With the collapse and pyroclastic flows on February 18, approximately 90% of the former Sinabung lava lobe had disappeared. A new lobe is occupied to form in the notch at the bottom of the second needle, and gives rise to glowing avalanches of block in the slope.
 

Sinabung - new lobe formation in the uppermost notch - Photo of 2015.02.20 / 3:29 p.m. Sadrah Peranginangin

Sinabung - new lobe formation in the uppermost notch - Photo of 2015.02.20 / 3:29 p.m. Sadrah Peranginangin

Sinabung - new lobe formation in the uppermost notch - Photo of 2015.02.21 / 10:06 Sadrah Peranginangin

Sinabung - new lobe formation in the uppermost notch - Photo of 2015.02.21 / 10:06 Sadrah Peranginangin

A pyroclastic flow has reached the furthest point since 2010, felling trees and razing houses in the villages of Suka Meriah and Gurukinayan between 7:20 p.m. and 8:10 p.m. Wednesday, according to a villager in an interview with The Jakarta Post. These villages, like the other five (Simacem, Bekerah, Berastepu, Gamber and Kuta Tonggol) were included in the red zone and evacuated since November 2013.
 

Sinabung - clear trace of fires generated by pyroclastic flow - photo Mbah Lewa 19/02/2015

Sinabung - clear trace of fires generated by pyroclastic flow - photo Mbah Lewa 19/02/2015

The village of Suka Meriah: left, the 02.18.2015 after the pyroclastic flow - photo Sadrah Peranginangin - right, the same village a year earlier - photo Pierre Quiqueré / Kapt. Krokette - a click to enlargeThe village of Suka Meriah: left, the 02.18.2015 after the pyroclastic flow - photo Sadrah Peranginangin - right, the same village a year earlier - photo Pierre Quiqueré / Kapt. Krokette - a click to enlarge

The village of Suka Meriah: left, the 02.18.2015 after the pyroclastic flow - photo Sadrah Peranginangin - right, the same village a year earlier - photo Pierre Quiqueré / Kapt. Krokette - a click to enlarge


The head of the Disaster Mitigation Agency Karo says that the residents of this red area must be relocated to Siosar in the district of Merek. In a first time, 370 houses will be built for the people of Suka Meriah, Simacem and Bekerah before the month of June, and a second batch of 1,600 houses for the rest of the residents.

Today, a controversy has arisen concerning assistance funds to be siphoned off by the authorities. The coordinator of evacuation land, from thevillage Gurukinayan, says have evidence usable in court: increase in the number of people evacuated, people who refused to help, but still accounted, not collecting of the aid promised for the semester.

These accusations are denied by the director of the mitigation agency Karo District disasters, which claims to transparent management and promises aid for 25 February.
(Jakarta Post 21/02/2015)

 

Sources:
- Photo Twitter and Facebook
- Jakarta Post

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
 Dramatic vision of the eruption Holuhraun - photo Lukas Gawenda 2015.

Dramatic vision of the eruption Holuhraun - photo Lukas Gawenda 2015.

The eruption of Holuhraun / Nornahraun continues in a minor key ... which does not mean the end of the eruption, according to volcanologist Ármann Höskuldsson who speaks in an interview with RUV News.

The seismic activity, which began on the edge of the caldera of Bárðarbunga on August 16, 2014, decreased in the last month ... and a tendency to a rapid decrease is possible, as shown seismicity weekly charts at the caldera and the intrusive dyke (IMO).

Chart showing logarithmically the accumulated earthquakes per week respectively at Bárðarbunga and at the intrusive dyke. The red line marks the beginning of the eruption. We must interpret the trend of the curve, and does not take into account each point, which could lead to outliers. - Doc. IMO

Chart showing logarithmically the accumulated earthquakes per week respectively at Bárðarbunga and at the intrusive dyke. The red line marks the beginning of the eruption. We must interpret the trend of the curve, and does not take into account each point, which could lead to outliers. - Doc. IMO

Number and magnitude of earthquakes in the Vatnajökull 19.02.2015 / à10h15 - Doc IMO

Number and magnitude of earthquakes in the Vatnajökull 19.02.2015 / à10h15 - Doc IMO

Presentation by Armann Höskuldsson - photo Vizier / Fréttablaðið-VALLI

Presentation by Armann Höskuldsson - photo Vizier / Fréttablaðið-VALLI

In case of the end of the eruption Holuhraun and persistence of seismicity in subsurface, the scenario could develop into an eruption of Bárðarbunga itself, according to Dr. Höskuldsson.

As he says in his colorful language: " The "mother of volcanoes" as he called Bárðarbunga is in turmoil, and the decrease in the eruption Holuraun / Nornahraun is a sign of alarm, as if another turn events was expected "... and he concluded as follows: " it is impossible for the mother (volcanoes) not manifest his presence. "

The IMO reported a total of 30 earthquakes on 
2/19/15 around the caldera, most grouped between 1:25 and 2:10, characteristics of seismic activity related to subsidence ... to watch !

"The Krafla fires" - eruption 15/09/1984 - photo Michael Ryan / USGS

"The Krafla fires" - eruption 15/09/1984 - photo Michael Ryan / USGS

The type of activity met at Holuraun could last a few years, as the "Fires of the Krafla" where this took place over a decade.

The eruptive cycle began in 1975 at Krafla, developed six eruptions until 1984. The fissure eruptions began western side of the caldera, and took place in a NS axis ... the site of each new fissure eruption moving to the N and E, with an increasingly important issue of materials.

 

Sources :

- Visir - „Bárðarbunga er mamman og börnin eru byrjuð að leika sér“ - link

- Bárðarbunga - decay of seismic activity - link

- The Krafla Fires  - link

- Global Volcanism Program – Krafla

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques

The Chikurachki volcano has an eruption on February 16, accompanied by a rising ash plume to 7,500 meters. (VAAC Tokyo - link). The aviation code is passed to orange.

Eruptive plume Chikurachki on 16.02.2015 (from right to left / center of doc.) - Doc. NASA Terra Modis

Eruptive plume Chikurachki on 16.02.2015 (from right to left / center of doc.) - Doc. NASA Terra Modis

To the left,  location of the volcano Chikurachki on the island Paramushir / northern Kuril - GVP map - to the right, 3D digital model of Chikurachki, created from a Landsat 7 image by DV Melnikov. / GVP - a click to enlargeTo the left,  location of the volcano Chikurachki on the island Paramushir / northern Kuril - GVP map - to the right, 3D digital model of Chikurachki, created from a Landsat 7 image by DV Melnikov. / GVP - a click to enlarge

To the left, location of the volcano Chikurachki on the island Paramushir / northern Kuril - GVP map - to the right, 3D digital model of Chikurachki, created from a Landsat 7 image by DV Melnikov. / GVP - a click to enlarge

The Chikurachki is the highest volcano in the island Paramushir, located in the northern Kuril archipelago. This cone, relatively small at present, was built on a high building dating from the Pleistocene; it is covered with deposits of basaltic to andesitic oxidized slag, which gives it its reddish specific hue. It is characterized by Strombolian eruptions, and basaltic Plinian eruptions less frequent (1853 & 1986).
 

The Chikurachki volcano - photo A.Belousov

The Chikurachki volcano - photo A.Belousov

The Chikurachki is located north of a volcanic group consists of six volcanic centers: the Tatarinov group, forming with it a north-south volcanic complex. Tatarinov The Tatarinov is heavily eroded. His tephrochronologic dating only showed a single eruption in historic times, although the most southern cone has an encrusted sulfur crater, with fumaroles, which were active along the edges of the lake until 1959.

This contrasts with the Chikurachki frequent activity. The Global Volcanism Program succession of eruptions in 1853.1853 to 1859, 1958, 1961, 1964, 1973, 1986, 2002, 2003, 2004, 2005, 2007

and 2008. Chikurachki erupting in 2003 - photo L.Kotenko / KVERT

and 2008. Chikurachki erupting in 2003 - photo L.Kotenko / KVERT

The Paramushir island and Chikurachki volcano in eruption on 26.04.2003 - note the position of the volcano along the Okhotsk sea and the end of the Tatarinov group chain, with the Fuss peak in the foreground. Center left, the island Atlasov and Alaid volcano. NASA Space Shuttle Image ISS006-E-52695, 2003 (http://eol.jsc.nasa.gov/).

The Paramushir island and Chikurachki volcano in eruption on 26.04.2003 - note the position of the volcano along the Okhotsk sea and the end of the Tatarinov group chain, with the Fuss peak in the foreground. Center left, the island Atlasov and Alaid volcano. NASA Space Shuttle Image ISS006-E-52695, 2003 (http://eol.jsc.nasa.gov/).

Chikurachki, seen from the top of Karpinsky - fumarolic activity in July 2012 - Photo Lyachovets S. FEB RAS

Chikurachki, seen from the top of Karpinsky - fumarolic activity in July 2012 - Photo Lyachovets S. FEB RAS

Volcanoes of Atlasov and Paramushir islands to the north are under the control of KVERT - Volcanic Eruption Kamchatka Response Team. Volcanoes further south are under the control of SVERT - Volcanic Eruption Sakhalin Response Team.

The KVERT was established in 1993 by the Institute of Volcanic Geology and Geochemistry of Far East Division of the Russian Academy of Sciences (RAS IVGG EDF) in collaboration with ea Alaska Volcanic Observatory (AVO), the United States Geological Survey (USGS) and the Geophysical Institute of the University of Alaska.

All these structures are important for air navigation and safety of many passengers transported about a thousand daily flights over the area, which connects North America to Eurasia and Japan.

Sources :

- Communiqué de l'agence Tass - tass.ru

- Global Volcanism Program - Chikurachki

- KSCNET / KVERT - Chikurachki

- Nasa .gov - photo aérienne du space shuttle.

- Svert - Sakhaline Volcanic Eruption Response Team.

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques

The Soputan, located northeast of the island of Sulawesi, erupted on February 11, 2015 at 7:29. The eruption was accompanied by an ash plume rising to 3,500 meters, before drifting to the southeast.

The alert was given by the PVMBG to the airport Sam Ratulanfi and BPBDs on 10 February. An unauthorized area for community activities of 4 km around the top is in effect, scope southwest side up to 6.5 km away.

Source: PVMBG


 

Soputan - 11.02.02015 - left, visual - right, top: sismo past 48 hours and below: graph of the evolution of seismic amplitude over time (MRS) - Doc. PVMBG

Soputan - 11.02.02015 - left, visual - right, top: sismo past 48 hours and below: graph of the evolution of seismic amplitude over time (MRS) - Doc. PVMBG

On the island of La Reunion, the eruption of the Piton de la Fournaise, which began Feb. 4, continues without significant changes in the tremor and geophysical parameters recorded by the OVPF. The rain stopped on the top middle of the day on February 11, and the south side of the volcano is visible again from the Bert Piton from 14:30.

Source: OVPF

Piton de la Fournaise - the eruption and the glow of the lava flow, views on 02.10.2015 / 8:22 p.m. from the red Piton - photo OVPF

Piton de la Fournaise - the eruption and the glow of the lava flow, views on 02.10.2015 / 8:22 p.m. from the red Piton - photo OVPF

On the left, changing tremor associated with the eruption of La Fournaise - right, contours of the flow established on 08/02/2015 - a click to enlarge -doc OVPFOn the left, changing tremor associated with the eruption of La Fournaise - right, contours of the flow established on 08/02/2015 - a click to enlarge -doc OVPF

On the left, changing tremor associated with the eruption of La Fournaise - right, contours of the flow established on 08/02/2015 - a click to enlarge -doc OVPF

The Turrialba, in Costa Rica, well deserves its name meaning "White Tower" in reference to the steam plume that usually overcomes.

Fumaroles of the western crater showed Feb. 11 early in the day an increasing of gas flow and water vapor, following the entry of large quantities of meteoric water in recent days.

Source: Ovsicori

 

Turrialba, and his white plume on 11/02/2015 - Fotografía por Ericka Calvo Durán, desde Capellades.

Turrialba, and his white plume on 11/02/2015 - Fotografía por Ericka Calvo Durán, desde Capellades.

 Turrialba - white fumaroles of the western crater 11.02.02015 / 7:32 - webcam Ovsicori

Turrialba - white fumaroles of the western crater 11.02.02015 / 7:32 - webcam Ovsicori

In the Pacific, local news reported a new volcanic activity spot located about 72 km south-west of the island of Vava'u (or 20 km SW of Late island).

This review follows the observation, by a pilot during a flight from Ha'apai (the last eruption site confirmed in December 2014) to Vava'u on February 9 at 15:16, of a white vapor cloud amount more 2000 feet before drifting SW.

Subject, as no trace of pumice rafts or other floating volcanic debris, nor volcanic gas smell are reported.

Sources:
- Matongitonga 02.11.2015 / 5:13 p.m.
- Daily Tonga News 11.02.2015 / 2:35 p.m.


 

Map of Tonga - Vava'u is located in the northern group and Ha'Hapai in the central group.

Map of Tonga - Vava'u is located in the northern group and Ha'Hapai in the central group.

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques

Volcanic activity on Fogo / Cha das Caldeira has been little commented in February ... a report from the University of Cape Verde helps us to fill that gap.

Despite a significant decrease in sulfur dioxide emissions associated with the eruption column, estimated at an average rate of 214 tonnes / day (compared to 12,500 tons / day December 2, 2014), the eruption is not over.

 

Fogo - 01.02.2015 / 18h - photo OVCV

Fogo - 01.02.2015 / 18h - photo OVCV

Scientists at the University of Cape Verde note moderate explosions at a rate from 1 to 12 explosions per minute on February 3, and the presence of an eruptive column of 800 to 1,000 meters high with projections of spatters and materials pyroclastic. The temperature of the active flows between Monte Beco and Monte Saia reached 639 ° C.

Fogo - pahoehoe lava flow sub-vertical and temperature mesurement with a thermal camera on Feb. 3 - a click to enlarge - doc. OVCVFogo - pahoehoe lava flow sub-vertical and temperature mesurement with a thermal camera on Feb. 3 - a click to enlarge - doc. OVCV

Fogo - pahoehoe lava flow sub-vertical and temperature mesurement with a thermal camera on Feb. 3 - a click to enlarge - doc. OVCV

Fogo - 02.03.2015 / 17h30 - Photo OVCV

Fogo - 02.03.2015 / 17h30 - Photo OVCV

On February 5, cloudiness does not clearly let see the plumes emitted; explosions are heard at a rate of up to 3-6 per minute. Loud noises are attributed to movements in sub-surface.

February 6, at the beginning of the afternoon, a series of explosions generates the formation of plumes loaded, of a brownish color amount at 400-600 m. Between 13:45 and 15:45, explosive activity becomes more intense accompanied by a rising plume at 1200-1500 meters, and the projection of larger blocks and bombs. The temperature of the lava flows decreases, however, between 200 and 345 ° C.

Fogo - Feb. 6 / 1:10 p.m. - photo OVCV

Fogo - Feb. 6 / 1:10 p.m. - photo OVCV

On February 7, the plume of ash and gas is less dense, but still loud explosions ... at 14:30, the level of volcanic activity increases, with significant volume of gas at the crack and eruptive plumes loaded, depositing ash in the east of the island. Around 17h20, the intensity and frequency of explosions diminish, as the height of plumes.
 

Fogo, February 7, 2015 - dense eruption column 16h - OVCV pictures
Fogo, February 7, 2015 - dense eruption column 16h - OVCV pictures

Fogo, February 7, 2015 - dense eruption column 16h - OVCV pictures

On February 10, "Fogo news" relates generally calm, with less release of gas fumaroles and ash, which would following Nadir Cardoso, from the Uni-CV, an indicator of the final phase of the eruption, given the stability of the situation in the past three days. The rate of measured SO2 declined around 100 tons / day.

To be continued ...

 

Sources :

- Universidade de Cabo Verde - Acompanhe os desenvolvimentos científicos da Erupção Vulcânica de 2014/2015 

- Fogo news.

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques

Chilean authorities inform the population of the Araucania region, after notification of SERNAGEOMIN / OVDAS, over the alert level change of the Villarica volcano.

On February 6, the observatory reports an increase of seismicity, with a progressively more shallow signal of tremor, suggesting magma movements towards the surface, corresponding to a night glow observed in the night at the top of 02/05/15.

A continuous degassing, with a lower plume 150 meters is also reported.

 

Villarica - summit crater - photo Sarah and Iain

Villarica - summit crater - photo Sarah and Iain

Villarica - Night glow on 05/02/2015 - doc.sernageomin.clvillarrica.php httpwww.povi.clindex.html

Villarica - Night glow on 05/02/2015 - doc.sernageomin.clvillarrica.php httpwww.povi.clindex.html

Villarica - the crater and the lava lake on 06/02/2015 - Red photo Emergencia / Twitter

Villarica - the crater and the lava lake on 06/02/2015 - Red photo Emergencia / Twitter

The alert level was raised to Amarillo, given an increase of seismicity to non-standard values, confirming an unstable volcanic system. The rise of the lava lake was confirmed by a survey on 6 February.

The previous increase of activity date November-December 2014.

 

Villarica: Arrows indicate the position of bombs and projections of 3 m. Note a plume ashes loaded and incandescence.- 02/06/2015 - photo Povi / Twitter

Villarica: Arrows indicate the position of bombs and projections of 3 m. Note a plume ashes loaded and incandescence.- 02/06/2015 - photo Povi / Twitter

In connection with the activity of Villarica:

The seismologist C.Mora-Stock reported in a 2012 article, an increasing of tremor, LP Event and degassing rate at Villarica in the weeks before the earthquake in Maule, interpreted as caused by a magma flow in depth. The post-earthquake volcano activity corresponds to a structural adjustment, without reaching a critical stage and an eruption.
 

Villarica: summit crater of Evolution: from left to right, in 2000, 2004 and 2007.- a click to enlarge - Doc. GVP & PanoramioVillarica: summit crater of Evolution: from left to right, in 2000, 2004 and 2007.- a click to enlarge - Doc. GVP & PanoramioVillarica: summit crater of Evolution: from left to right, in 2000, 2004 and 2007.- a click to enlarge - Doc. GVP & Panoramio

Villarica: summit crater of Evolution: from left to right, in 2000, 2004 and 2007.- a click to enlarge - Doc. GVP & Panoramio

Sources :

- Reporte Especial de Actividad Volcánica (REAV) REGIÓN DE LA ARAUCANÍA Año 2015 febrero 06, 21:00 HL – link

- Noticias Sernageomin - Comité técnico se reúne por situación de volcán Villarrica – link

- POVI - Proyecto de Obsevacion Volcano Villarica  - link

- Comparison of seismic activity for Llaima and Villarrica volcanoes prior to and after the Maule 2010 earthquake – by Cindy Mora-Stock & al. – link

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques

The Holuhraun's eruption could last at least until early this summer, and even later in the year, according Andri Stefánsson, professor of geochemistry at the University of Iceland.

What concerns scientists, it is the accumulation of pollution - sulfur, fluorine, chlorine and heavy metals - in snow cover in the area of the eruption, and its impact on humans and the environment and animal plant .

 

Holuhraun - sulfur pollution on the site eruptive - photo Lukas Gawenda / Twitter 23.01.2015

Holuhraun - sulfur pollution on the site eruptive - photo Lukas Gawenda / Twitter 23.01.2015

One of the sensitive sites: Norðfjörður fjord where is located the small town of Neskaupsstaður (1,540 inhabitants) - photo Pjetur Sigurðsson / Iceland Magazine

One of the sensitive sites: Norðfjörður fjord where is located the small town of Neskaupsstaður (1,540 inhabitants) - photo Pjetur Sigurðsson / Iceland Magazine

During the spring snowmelt, pollution will be released into the environment and mix with drinking water.

Forty percent of rainwater are already considered polluted by the gases emitted, both by sulfur dioxide and fluorine. The conversion of acid rain in SO2 is closely monitored ... with visible effects in the east, where new zinc roofs are rusting this winter. The effects of fish mortality on acid rain have already been recognized in the Nordic countries, as well as mouse death in Iceland.

 

Installation of new monitoring stations in the Holuhraun 22/01/2015 - photo IMO

Installation of new monitoring stations in the Holuhraun 22/01/2015 - photo IMO

New measurement equipment was installed two weeks ago on the eruptive site, under the Futurevolc project in collaboration with the University of Palermo and the British Geological Survey: a weather station (humidity and speed and wind direction measurements) and a measurement MultiGAS (H2O, SO2, CO2, H2S and H2), with data transmission to the Met Office services.

According to him, the eruption happening now about 20 tons of sulfur dioxide per day, against 30 to 40 tons / day in the first moments of the eruption.

 

Forward map of polluted zone with gas of eruption in Holuhraun for the 07/02/2015 - Doc. IMO

Forward map of polluted zone with gas of eruption in Holuhraun for the 07/02/2015 - Doc. IMO

Polluant degassing at Holuhraun 01/27/2015 - photo Tomas Freyr Kristjansson / Dailymail

Polluant degassing at Holuhraun 01/27/2015 - photo Tomas Freyr Kristjansson / Dailymail

 Holuhraun on 03/02/2015 - photo R.Sigurdsson - Artic pictures

Holuhraun on 03/02/2015 - photo R.Sigurdsson - Artic pictures

Sources:

- Icelandic Met Office - daily reports

- Iceland Magazine et Iceland Review

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques

The Piton de La Fournaise erupted this Wednesday, February 4, 2015 at 11 am. local. The eruption follows, according the OVPF, a swarm of 180 summital earthquakes, including two of magnitude greater than 2. The tendency by the JERK monitoring system to show a sign of intrusion and the likely imminence of an eruption prompted the Prefecture to trigger the ORSEC rescue plan, at the moment where the volcano erupted. Access to the top of the enclosure is closed to the public until further notice.

The crack would open in the south-western part of the "Enclos", in the triangle Bory-Dolomieu- crater Rivals. For information, the Rivals crater is located on the slopes of the main cone within the caldera of Piton de la Fournaise, called Enclos Fouque. It was formed following an eruption dated 1937. It rises to 2243 meters. (to precise further ...)

Images France Tv / Dailymotion

  Approximate site of the eruption SW of the Enclos Fouque.

Approximate site of the eruption SW of the Enclos Fouque.

La Fournaise  - The first visible signs of the eruption of 02.04.2015 on webcams: left, webcam Piton de Bert, glow to the top left corner at 2:14 p.m. - right, webcam Piton basalts at 3:56 p.m. - a click to enlarge - source OVPFLa Fournaise  - The first visible signs of the eruption of 02.04.2015 on webcams: left, webcam Piton de Bert, glow to the top left corner at 2:14 p.m. - right, webcam Piton basalts at 3:56 p.m. - a click to enlarge - source OVPF

La Fournaise - The first visible signs of the eruption of 02.04.2015 on webcams: left, webcam Piton de Bert, glow to the top left corner at 2:14 p.m. - right, webcam Piton basalts at 3:56 p.m. - a click to enlarge - source OVPF

An interview with Nicolas Villeneuve in L’Info.re allows to specify the conditions of the eruption, the volcano being under surveillance since September. "The tremor is not very high at the moment. We have a seismic crisis that was relatively short and highly placed in the foundation. It looks a lot like what we saw in the years following the Great eruption of 2007. These are eruptions that prevent late and do not last very long, unfortunately for the general public. I just hope I'm wrong and that a deep magma source allows the rash lasts over time ".

Three people left to the eruption site, where there is bad weather.

Around 15 hours, " lava projections reached ten meters high, which is relatively small compared to other eruptions we known " has said Philippe Kowalski, deputy director of the OVPF in RTL Meeting. " Compared to the beginning of the eruption, the activity was almost divided by four and so far the level of the eruption appears stable at a low level " he added. (
Imazpress)

The Clicanoo edition of 
7:47 p.m. offers the first aerial photos of the eruption of La Fournaise, taken by the photographer Hervé Douris, during a thinning - Clicanoo lien to the photos.

A lava flow down the slopes of the volcano, subdivided into several arms.

La Fournaise - the eruptive fissure and lava flow view at a thinning - photo Hervé Douris / #gotoreunion / Twitter

La Fournaise - the eruptive fissure and lava flow view at a thinning - photo Hervé Douris / #gotoreunion / Twitter

La Fournaise  - 02.04.2015 - the eruptive fissure and the start of the lava flow - photo Sylvain G. / via Réunion 1°.

La Fournaise - 02.04.2015 - the eruptive fissure and the start of the lava flow - photo Sylvain G. / via Réunion 1°.

Over the past decade, La Fournaise experienced any twelve eruptions.

Details of OVPF February 5 8am loc. on the eruption site:

- The eruptive fissure opened to the south over a length of about 500m, starting from a point located at a hundred meters outside and west of the Bory crater.
- Following the opening of the crack, eruptive activity was concentrated mainly on the point the southernmost of the crack (about 2500 m).
- The lava flow rapidly down towards the crater Rivals (south - southwest direction). Lowest, the flow was divided into several branches, spreading across an area between the south and southeast of the crater Rivals.
- By late afternoon, the southernmost arm of the flow exceeded the "
Cornu crater ". The most eastern arms (direction craters " quatre gueules ") was less active.

 

Sources :

Institut de Physique du Globe Paris – OVPF – link

Global Volcanism Program – Piton de La Fournaise - link

Médias Réunionnais : Clicanoo – linfo.re - Imazpress

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Piton de La Fournaise / La Réunion - parking of Bellecombe, acces point to the caldera

Piton de La Fournaise / La Réunion - parking of Bellecombe, acces point to the caldera

Activity bulletin of Piton de la Fournaise of February 4, 2014 9:00 local - OVPF

Since since this morning 4H loc. (0h UT) we recorded 180 summital earthquakes including 5 magnitude greater than 2.
Currently, there is no deformation or emission of gas detected.
But the trend is clearly to the increased activity of the volcano and our JERK system is an experimental protocol suggests an intrusion sign.
We recommend a transition to Phase Vigilance. (She had already been activated from 1 to 30 November and 4 December 2014 to 15 January 2015)
Currently stored earthquakes are located high up in the building, the situation can change very quickly.

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Etna - Strombolian activity and lava flow on 02/01/2015 - photo Roberto Fichera

Etna - Strombolian activity and lava flow on 02/01/2015 - photo Roberto Fichera

More details about the eruptive episode of 31 January / 2 February by the INGV Catania:

Improved visibility on the evening of 1 February made locate the strombolian activity at a vent located on the saddle between the two southeast cones of Etna. Explosions at an intervals of a few seconds projected bombs to 200 meters in height, which impact on the southern flank of the Southeast Crater.

 

Etna - Strombolian activity and lava flow on 02/01/2015 - photo Davide Gentile / Etna Walk

Etna - Strombolian activity and lava flow on 02/01/2015 - photo Davide Gentile / Etna Walk

At the same time, an effusive mouth located at the southern base of the southeast cone at a location corresponding to the lowest part of the southwest eruptive fracture of December 28, issued a lava flow that followed a path, identical to the casting of 28 December.

After crossing the "crater del Piano", the flow went to the west of Monte Frumento Supino and headed to an area between Milia and Galvarina, before dividing into two branches that reached on the morning of February 2 the quota 2,000 meters.

Etna summit craters - photo Marco Neri 01.14.2015 / INGV Catania - at the forefront, we distinguish the southeast crater, and left the eruptive fracture of December 28th, from the bottom level of the saddle between the old SEC and the NSEC, in foreground.

Etna summit craters - photo Marco Neri 01.14.2015 / INGV Catania - at the forefront, we distinguish the southeast crater, and left the eruptive fracture of December 28th, from the bottom level of the saddle between the old SEC and the NSEC, in foreground.

At dawn on February 2, the strombolian activity of the southeastern cone produces a dense volcanic ash cloud, driven by the winds to the east.

Around 6:50 UTC, the ash emission stopped, at the same time that the amplitude of tremor showed a sharp decline.

Etna - the emission of ash 02.02.2015 / 6:52 - webcam Etnatrekking

Etna - the emission of ash 02.02.2015 / 6:52 - webcam Etnatrekking

Etna - Tremor chart at 02.02.2015 / to 9:49  - Doc. INGV Catania

Etna - Tremor chart at 02.02.2015 / to 9:49 - Doc. INGV Catania

Sources :

Rapport de l'INGV Catania du 02.02.2014 / 9h30

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