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Earth of fire

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

actualites volcaniques

Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
Summit of Bulusan - photo archives USGS / C.Newhall

Summit of Bulusan - photo archives USGS / C.Newhall

After the phreatic explosions of 16 June 2015, the Bulusan resumed on Friday, June 19th at 14:55. This explosion was accompanied by an ash plume 1,500 meters high, which drifted WSW, said Phivolcs.

According to the National Disaster Risk Reduction and Management Council, the explosion of Friday would have affected 6,884 families (over 34,000 inhabitants) in the villages of Barcelona, ​​Bulusan, Irosin, Casiguran and Juban in the Sorsogon island.

On June 20, at 8 am, a low cloud, which can be due to a small pyroclastic flow, is indicated on the upper slopes NO, partially covered by clouds; this episode is followed by emission of a plume reaching 250 meters, moderately loaded inash and after of steam.

The Phivolcs inform of low energy emission of steam and ashes on June 21 at 13:15, accompanied by a small plume 150 m high and ash fall on the summit of Bulusan.
 


The Level 1 alert remains in force, indicating instability of the hydrothermal system that may lead to phreatic eruptions, and linked to a restricted area of ​​4 km radius.

 

Sources :

- PHIVOLCS rapports des 19 et 21.06.2015 - link

- National Disaster Risk Reduction and Management Council - 20.06.32015 - link

Bulusan  16.06.2015 - photo Nakuhanan ni YouScooper @SeekGoodLife ang pagputok ng Mt. Bulusan ngayong umaga

Bulusan 16.06.2015 - photo Nakuhanan ni YouScooper @SeekGoodLife ang pagputok ng Mt. Bulusan ngayong umaga

On the island of Sumatra, the Sinabung lava lobe still has collapsus, that are accompanied by avalanches of blocs and pyroclastic flows; in the course of the night, around 11:35 p.m., a flow traveled over 3,000 meters to the south-east, and on 1:13, about 4,000 meters, leaving after passing  burned materials.
 

Sinabung the 21.06.2015 / 11:35 p.m. - photo endrolew@

Sinabung the 21.06.2015 / 11:35 p.m. - photo endrolew@

Sinabung the 22.06.2015 / 1:13 - fires demonstrate the long travel of the morning flow - photo endrolew@

Sinabung the 22.06.2015 / 1:13 - fires demonstrate the long travel of the morning flow - photo endrolew@

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques

On Isabela Island in the Galapagos archipelago, the eruption of Wolf volcano continues.

In recent days, the site Mirova reports an high thermal anomaly, and Aqua MODIS satellite imagery of June 18 show that the eruption site is now located in the caldera, a few kilometers west of the original site.

No news of the eruption on the site of the Parque Nacional, except a retweet from Andes EN, signaling that the population of  endemic pink iguanas remains stable despite the eruption.

 

Volcan Wolf - Image Modis Aqua /TC4_Galapagos.2015169.aqua.721.250m of 06.18.2015 - the eruption site in the caldera (red dot)

Volcan Wolf - Image Modis Aqua /TC4_Galapagos.2015169.aqua.721.250m of 06.18.2015 - the eruption site in the caldera (red dot)

Volcan Wolf - high thermal anomaly reported by Mirova on 16 and 19.06.2015
Volcan Wolf - high thermal anomaly reported by Mirova on 16 and 19.06.2015Volcan Wolf - high thermal anomaly reported by Mirova on 16 and 19.06.2015

Volcan Wolf - high thermal anomaly reported by Mirova on 16 and 19.06.2015

In Sinabung / Sumatra, the pyroclastic flows have followed throughout the day of June 19th

Of those that were reported June 19, 2015:
- 8:12 - term casting 2,500 m - 500 m ash column. SE
- 9.50
- 11:38 / 11:42 - term casting 3,000m -Column ash 2,000m
- 11:51 - term casting 2,500 m -Column ash 1,000m
(Info via PVMBG / Twitter)

It is interesting to see the development of the pyroclastic flow of 11:40 to 11:42, in the pictures of endrolew @; James Reynolds, also on site, reports that while the east side of Sinabung was covered by pyroclastic flows on the morning of 19 June (Twitter)

 

Sinabung - development of the pyroclastic flow 06/19/2015 - 11:40 in the top, bottom at 11:42
Sinabung - development of the pyroclastic flow 06/19/2015 - 11:40 in the top, bottom at 11:42

Sinabung - development of the pyroclastic flow 06/19/2015 - 11:40 in the top, bottom at 11:42

Beautiful images of pyroclastic flows Sinabung by Guy de Saint Cyr / Apen Sitangang / Lumban Gaol Janter, filmed from 9 to 15 June 2015, which illustrate the power and the extreme danger they represent.

 

Pyroclastic flows of Sinabung by Guy de Saint Cyr / Apen Sitangang / Lumban Gaol Janter - via the Adventure and Volcanoes site.

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
Etna - preparatory work by a trekker - photo Turi Caggegi / iEtna

Etna - preparatory work by a trekker - photo Turi Caggegi / iEtna

Etna on Google Street View :

To celebrate the second anniversary of the integration of the volcano on the list of UNESCO World Heritage, Google mapped the slopes of Etna, and made available to all, for free, from June 18, the possibility to visit virtually the volcano, under the title "Basalto lavico dell'Etna".

In collaboration with the volcanologist of the Park, Salvo Caffo, and Orazio Distefano, guide, a trek has been made in recent months by the teams, including the ascent to the Sapienza refuge, the summit abyss, the descent on the northern slope towards the observatory Pizzi De Neri, the Silvestri craters, the Schiena dell'Asino and the Valle del Bove.

Note that other virtual volcano tours are scheduled: the Park of the volcanoes of Hawaii, Meteor Crater in Arizona, from the Japanese Aso and Konpira volcanoes to the Sunset crater National Monument, without forgetting the Crater Lake National Park.

Source: Turi Caggegi / iEtna.

 

Etna Street Vieuw - what you can see on your tablet or smartphone - doc iEtna

Etna Street Vieuw - what you can see on your tablet or smartphone - doc iEtna

The lake of Halema'uma'u is playing yoyo !

From 28 April, the level of the lava lake had reached the edge of the crater Overlook and then spilled over the floor of Halema'uma'u crater. In connection with a deflation phenomenon, its level then dived from 9 May to 60 meters under the edge of the Overlook.

A resurgence of inflation on June 16 did back 15 meters, and its level is on June 17 at 35-40 meters below the edge of the pit crater; its surface is marked by a vigorous spattering. On June 18, around 01 a.m., he plunged 45 m.under the new edge of the Overlook
.

Sources : HVO - link

Hawaii / Kilauea - lava lake in Halema'uma'u: above, the Overflow 29/04/2015 - photo below, the level at -60 m. the 09/06/2015; notice the new darker edge of the crater - photos HVO - USGS
Hawaii / Kilauea - lava lake in Halema'uma'u: above, the Overflow 29/04/2015 - photo below, the level at -60 m. the 09/06/2015; notice the new darker edge of the crater - photos HVO - USGS

Hawaii / Kilauea - lava lake in Halema'uma'u: above, the Overflow 29/04/2015 - photo below, the level at -60 m. the 09/06/2015; notice the new darker edge of the crater - photos HVO - USGS

Hawaii / Kilauea - lava lake in Halema'uma'u: Level Fluctuations between 8 and June 12, 2015 - a click to enlarge - photos HVO- USGS

Hawaii / Kilauea - lava lake in Halema'uma'u: Level Fluctuations between 8 and June 12, 2015 - a click to enlarge - photos HVO- USGS

In Sinabung, there was a pyroclastic flow on 19 June that traveled 3,000 meters to the south-east, accompanied by a plume amount to 2,000 m.

The dome-lobe seems increasingly unstable, but remains suspended at the time of writing this article.

 

Sinabung - pyroclastic flow of 06.19.2015 / 11:42 - photo above /Hasron David Ginting via Beidar Sinabung / Twitter - under / Endrolew@
Sinabung - pyroclastic flow of 06.19.2015 / 11:42 - photo above /Hasron David Ginting via Beidar Sinabung / Twitter - under / Endrolew@

Sinabung - pyroclastic flow of 06.19.2015 / 11:42 - photo above /Hasron David Ginting via Beidar Sinabung / Twitter - under / Endrolew@

The unstable dome Sinabung on 18.06.2015 / 2:16 p.m. - photo endrolew@

The unstable dome Sinabung on 18.06.2015 / 2:16 p.m. - photo endrolew@

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
Cotopaxi - photo Jose Luis Espinosa-Naranjo, 2015.

Cotopaxi - photo Jose Luis Espinosa-Naranjo, 2015.

Mess or uncertainty at Cotopaxi?

Despite an increase in seismicity, inflation of the northeastern flank, a larger degassing plume and sulfur dioxide emissions five times higher than the base level, the level of alert Cotopaxi has not was increased by IGEPN; Institute put on a going activity in the coming weeks.

Secretary of risk management, Ms. Cornejo, assures the support of the Meteorological Institute with the problem that could pose potential lahars; Population training meetings are held on this risk in the province of Cotopaxi.

Sources:

- IGEPN rapport du 11.06 - link

- El Comercio : Geofísico descarta erupción súbita del Volcán Cotopaxi; alerta blanca se mantiene.17.06.2015 - link

Kuchierabujima - 5 月 29 日 10 時 03 分, 口 永良 部 島 金 岳 小 中 学校 の 校 庭 で 撮 影 - http // Kuchi-erabu.orgfunka.html / 29.05.2015

Kuchierabujima - 5 月 29 日 10 時 03 分, 口 永良 部 島 金 岳 小 中 学校 の 校 庭 で 撮 影 - http // Kuchi-erabu.orgfunka.html / 29.05.2015

The JMA has identified a new eruption of Shindake cone / Kuchinoerabujima around 12:20 local on 18 June; it could not be observed directly because of the weather, but by seismographs.

The alert level remains maximum, and the inhabitants, evacuated in late May, can not return to their island.

Source : JMA - link

Sinabung 06.18.2015 / 1:05 a.m. - dome-lobe always in place and avalanche of blocks- photo endrolew@

Sinabung 06.18.2015 / 1:05 a.m. - dome-lobe always in place and avalanche of blocks- photo endrolew@

In Sinabung, the volcano has forced new preventive evacuations: the partial collapse form pyroclastic flows that run 2-3000 meters; the main risk remaining a total collapse of the huge summital dome-lobe, 1,200 people were displaced yesterday, and 2,500 more are expected to be soon.
 

Sinabung the 06.17.2015 / 10:26 p.m. avalanche of blocks and traces of the previous pyroclastic flows - photo endrolew@

Sinabung the 06.17.2015 / 10:26 p.m. avalanche of blocks and traces of the previous pyroclastic flows - photo endrolew@

  Sinabung the 06.17.2015 / 14h - pyroclastic flow - photo endrolew@

Sinabung the 06.17.2015 / 14h - pyroclastic flow - photo endrolew@

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
  Bulusan - phreatic eruption and ash and gas plume on 06/16/2015 - photo Twitter / via Ruel Saldico

Bulusan - phreatic eruption and ash and gas plume on 06/16/2015 - photo Twitter / via Ruel Saldico

The Bulusan volcano, located in Sorsogon Island in the archipelago of the Philippines presented this June 16, 2015 two explosions of phreatic nature, respectively at 11:02 & 11:20 LT. The plume of ash and gas rose to 300-500 m.

This activity follows five volcanic earthquakes detected in the last 24 hours, as well  low vapor emissions.

The director of Phivolcs, Solidum Reynato, confirms the phreatic nature of this activity, which is the third phreatic explosion since May. He suggests that such events are likely to recur and that the permanent danger zone of 4 km. around the crater should be strictly respected.

Sources :

- PHIVOLCS 

- médias :  GMA News / InterAksyon

Asama-yama. - Photo dated from 11.06, the cloud coverage of today did not allow a direct observation. - Doc. Japan News

Asama-yama. - Photo dated from 11.06, the cloud coverage of today did not allow a direct observation. - Doc. Japan News

A small phreatic eruption shook the ground of Asama-yama volcano that on June 16, about 9 am local, following a short phase of increased seismic activity. The absence of deformation do not let fear of larger eruption. Small ash falls were reported at 4 km north of the volcano.

Sources :

- Japanese Meteorological Agency

- NHK News / via Volcanodiscovery

Ambrym caldera safety map - doc VGO./ bulletin 6 16.06.2015

Ambrym caldera safety map - doc VGO./ bulletin 6 16.06.2015

The Vanuatu Geo-Hazards Observatory / VGO recalls the risks linked with the activity of Ambrym volcano. The alert level is maintained at 2 and the danger remains in the caldera Benbow and Marum around the craters, including Maben-Mbwelesu, Niri-Mbwelesu and Mbwelesu and in areas under the wind and exposed to volcanic gases ans ashes.

It recommends the view of the volcano from outside the Permanent Danger Zone - see map Vanuatu Geo-Hazards Observatory / VGO. - to avoid any accident.

Source : VGO - bulletin n°6 Tuesday, June 16th 2015

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
Sinabung on 13.06.2015, respectively at 13h56, 14h13 (left to right) and 14:15 loc (below) -.. Photo endrolew@Sinabung on 13.06.2015, respectively at 13h56, 14h13 (left to right) and 14:15 loc (below) -.. Photo endrolew@
Sinabung on 13.06.2015, respectively at 13h56, 14h13 (left to right) and 14:15 loc (below) -.. Photo endrolew@

Sinabung on 13.06.2015, respectively at 13h56, 14h13 (left to right) and 14:15 loc (below) -.. Photo endrolew@

The Sinabung had another eruptive crisis Saturday, June 13, that I could not tell because a meeting of the Nord-Pas de Calais-Picatrdie sectionof LAVE association.

According to AFP, pyroclastic flows descended the southeastern flank of 3,000 meters. A total of 11 avalanches were recorded, along with plumes rising up to 2,000 m. No casualties are reported, and more than 2,700 people in the area of ​​7 km. were evacuated.

 

Sinabung 13.06.2015 at 17h02 & 17h03 - photos Sadrah Peranginangin
Sinabung 13.06.2015 at 17h02 & 17h03 - photos Sadrah Peranginangin

Sinabung 13.06.2015 at 17h02 & 17h03 - photos Sadrah Peranginangin

On June 14, ten pyroclastic flows were reported on the southern slopes, reaching 3,500 meters, and to the southeast, where they traveled 2500 m. The casting of 5h 12 Loc. is considered as the most important of these last days.
 

Sinabung on 06/14/2015 at 15:37 loc.;  left of the ash plume is seen that the dome has preserved an impressive volume - photo endrolew@

Sinabung on 06/14/2015 at 15:37 loc.; left of the ash plume is seen that the dome has preserved an impressive volume - photo endrolew@

According Alhidavat Deri, an official with the PVMBG in an interview Sunday to Jakarta Post, "  In today’s eruption, Sinabung’s hot clouds simultaneously moved to the south and southeast. The hot cloud releases to the south reached 3,500 meters, or farther than the ones in the southeast, which reached 2,500 meters. From the latest data, the volume of Mt. Sinabung’s lava dome has reached 3.3 million cubic meters. Eruptions previously occurred have not yet fully abolished its lava dome; thus, there is still a potential for massive eruptions "

Sources:

- Jakarta post 15.06.2015 - link

- Mbah Lewa and Sadrah Peranginangin on social networks.

Santiaguito - le14.06.2015 / 6:13 -photo Insivimeh / OVSAN

Santiaguito - le14.06.2015 / 6:13 -photo Insivimeh / OVSAN

In Santiaguito, Guatemala, INSIVUMEH reported explosions accompanied by small plume of ash and gas amount to 2800-3000 m asl, then moving to the West and the Northwest, with possible falls of ashes over Llanos del Pinal and Quetzaltenango.

In Fuego, explosions are low to moderate, with plumes rising to 4,300 m asl 4600., Moving the O and NO, with ash fall on La Soledad, Acatenango and Sacatepequez. From the night, glow was observed.

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
Asama - high gaseous emissions and  level of alert raised - photo Japan News

Asama - high gaseous emissions and level of alert raised - photo Japan News

Asama - alert level 2 - photo Mainichi

Asama - alert level 2 - photo Mainichi

The JMA raised the level of Asama volcano at 2 out of 5, on 11 June, which establishes a no-go zone of 2 km around the crater. Sulphur dioxide levels have increased from 500 to 1700 tons / day.

Sources:

- Japanese médias : Japan News et the Mainichi.

- JMA - link

Sinabung - the avalanche of incandescent blocks 10.06.2015 / 7:35 p.m. - photo endrolew@

Sinabung - the avalanche of incandescent blocks 10.06.2015 / 7:35 p.m. - photo endrolew@

In Sinabung, partial collapse of the dome-lobe in continued growth generate pyroclastic flows on the south-southeast area of the volcano. Since Wednesday, more than 50 episodes of ash emissions were counted (Tech Times). The number of earthquakes associated with the collapses ("guguran" on the diagram of the VSI) is growing and they are more energetic.

In relation with rainfall conditions, residents near rivers should remain in alert to the risks of lahars. Recommendations on wearing masks, securing of drinking water, and cleaning of roofs are recalled.

The level is set by the VSI to Awas / IV since 02/06/2015

 

On the left, Sinabung parameters Diagram between January and June 10 - right, risk map and prohibited areas - Doc. VSI - a click to enlargeOn the left, Sinabung parameters Diagram between January and June 10 - right, risk map and prohibited areas - Doc. VSI - a click to enlarge

On the left, Sinabung parameters Diagram between January and June 10 - right, risk map and prohibited areas - Doc. VSI - a click to enlarge

Sinabung - plume of ash and gas and small collapse on the southeast side the 06.11.2015 / 6:30 loc. - Photo S@drah ps

Sinabung - plume of ash and gas and small collapse on the southeast side the 06.11.2015 / 6:30 loc. - Photo S@drah ps

Sinabung - ash emissions on 06.11.2015 / 12:55 loc. to the left and to the right, emission of ash and pyroclastic flow on 12.06.2015 / 10:46 loc. - Photos endrolew@ Sinabung - ash emissions on 06.11.2015 / 12:55 loc. to the left and to the right, emission of ash and pyroclastic flow on 12.06.2015 / 10:46 loc. - Photos endrolew@

Sinabung - ash emissions on 06.11.2015 / 12:55 loc. to the left and to the right, emission of ash and pyroclastic flow on 12.06.2015 / 10:46 loc. - Photos endrolew@

Sinabung summit - 11.06.2015 / 16h46 loc. - photo endrolew@

Sinabung summit - 11.06.2015 / 16h46 loc. - photo endrolew@

In Karangetang, on Siau Island / North Sulawesi continued an outpouring of lava at the summit vent and incandescent avalanches. The thermal anomaly is noted by Mirova on 9 and 11 June.

As a reminder, strombolian activity from early May and viscous lava emission was caused of collapses of blocs, accompanied by pyroclastic flows that destroyed houses in the village of Kora Kora and inundated with ash the northern flank of the volcano

Sources:
VolcanoDiscovery and Mirova



 

Karangetang - On the left, thermal anomalies of June by Mirova  - right, location of the volcano.Karangetang - On the left, thermal anomalies of June by Mirova  - right, location of the volcano.

Karangetang - On the left, thermal anomalies of June by Mirova - right, location of the volcano.

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
Fuego / Guatemala - 05.06.2015 - photo INSIVUMEH / ovfgo / ivm-fund

Fuego / Guatemala - 05.06.2015 - photo INSIVUMEH / ovfgo / ivm-fund

After remaining at a high level of activity during the past week, Fuego volcano / Guatemala produced on June 4 two lava flows, long of 400 to 700 meters.

On June 5, at 4:25 local, Fuego was rocked by an explosion accompanied by a rising ash plume 5,000 meters asl, before moving to a large south and west sector. Civil aviation is warned of possible risks associated with ashes.

An effusive eruption began, and powered two lava flows: the first towards the barranca Trinidad, south, 1,300 meters long, the second to the north-west and the barranca Santa Teresa, 600 m long  (05.06 / locale 9:10).

 

Fuego / Guatemala - 05.06.2015 - photo CONRED

Fuego / Guatemala - 05.06.2015 - photo CONRED

Note that a lahar accompanied by a strong smell of sulfur was recorded on 4.06 in the barranca Trinidad (Conred / Armando Vásquez.)
 

Fuego - lahar in the barranca Trinidad - photo 04.06.2015 CONRED

Fuego - lahar in the barranca Trinidad - photo 04.06.2015 CONRED

The activity is accompanied by a locomotive like noise, audible over 7 km.

The alert level is kept at Amarillo, and classified as moderate, but the situation can change with probability of pyroclastic flows in the ravines.

Sources :

- INSIVUMEH - DEPARTAMENTO DE INVESTIGACION Y SERVICIOS GEOFISICOS
BOLETIN VULCANOLOGICO ESPECIAL # 33-050615 & # 34-2015

- CONRED

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
Ubinas - the 03.06.2015 / 3:45 p.m. loc. - Photo webcam OVI-INGEMMET

Ubinas - the 03.06.2015 / 3:45 p.m. loc. - Photo webcam OVI-INGEMMET

The activity of the Ubinas in Peru has increased with ash emissions.

On June 2, at 7:20 am local, an ash plume rose to 700 meters above the crater. On June 3, at about 15 pm, a new issue and ash plume has reached 1,200 meters above the summit.

Wearing mask and glasses
, and protection of food and water supplies are recommended for the regions of Moquegua and Arequipa. The alert level remains at orange, since 17 April 2015.
 

Ubinas: on the left, 04.06.2015 / 1:14 p.m. loc - photo OVI-INGEMMET - right, scattering of ashes near the volcano - Doc. SENAMHI - a click to enlargeUbinas: on the left, 04.06.2015 / 1:14 p.m. loc - photo OVI-INGEMMET - right, scattering of ashes near the volcano - Doc. SENAMHI - a click to enlarge

Ubinas: on the left, 04.06.2015 / 1:14 p.m. loc - photo OVI-INGEMMET - right, scattering of ashes near the volcano - Doc. SENAMHI - a click to enlarge

At Sinabung, the expectation of a major collapse becomes stressful ... on June 5, in the late morning, a small pyroclastic flow traveled 1,500 meters on the south side.

More news later in the day.

Source: Beidar Sinabung

 

Sinabung - the top, the spines and the lava lobe - photo 03.06.2015 / Beidar Sinabung

Sinabung - the top, the spines and the lava lobe - photo 03.06.2015 / Beidar Sinabung

Sinabung: small pyroclastic flow on 5 june 2015 / 11h loc - photo Beidar Sinabung

Sinabung: small pyroclastic flow on 5 june 2015 / 11h loc - photo Beidar Sinabung

At Mount Hakone, near the Japanese capital, vapor emissions are described as weak by the JMA on Thursday; the number of volcanic earthquakes is also decreasing, from more than 400 daily earthquakes mid-May to only 4 on Thursday ... the first report showing a decline in activity since the beginning of last month.

However, the deformation continues, and because of the potential hazards for tourists, the alert level is maintained.

Source: Japan Times.

 

Hakone - the Owakudani Valley, 06/05/2015 - Reuters / Kyodo Photo

Hakone - the Owakudani Valley, 06/05/2015 - Reuters / Kyodo Photo

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Publié le par Bernard Duyck
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 Sinabung - the 03.06.2015 / 9:11 - photo endrolew@

Sinabung - the 03.06.2015 / 9:11 - photo endrolew@

The BNPB reported a sharp rise in activity level of Sinabung volcano. The constantly increasing volume of lava dome reaches more than 3 million cubic meters, and is weakened.

Because of the risk of pyroclastic flows, the prohibited area of 5 km remains in force, to 7 km. on the south and southeast slopes.

The alert level was recovered to IV / Awas

Carte des risques pour le Sinabung - doc. PVMBG

Carte des risques pour le Sinabung - doc. PVMBG

The summit of Cotopaxi - photo Jose Luis Espinosa-Naranjo 2015

The summit of Cotopaxi - photo Jose Luis Espinosa-Naranjo 2015

In Ecuador, the Cotopaxi recorded since mid-April an increase of seismicity, particularly of earthquakes associated with fluid flow within the building.

The IGEPN relates significant variations in sulfur dioxide levels, perceived by mountaineers. The deformation of the sides remains without major changes.

Cotopaxi - left, sulfur dioxide emissions in 2015 - right, the VLPs earthquakes from January to May 2015 - Doc. IGEPNCotopaxi - left, sulfur dioxide emissions in 2015 - right, the VLPs earthquakes from January to May 2015 - Doc. IGEPN

Cotopaxi - left, sulfur dioxide emissions in 2015 - right, the VLPs earthquakes from January to May 2015 - Doc. IGEPN

An overview of Wolf volcano on May 29 confirms decreased activity.

A plume of gas, ash (white) overcomes of 2-3 km the volcano before heading north-west. The active lava flows relate flanks East and Southeast, the East flow reaching the Pacific ..

Concentrations of sulfur dioxide in the atmosphere are declining, associated with lower outgassing. (OMI satellite measurements, GOME-2, OMP, and local mini-DOAS)

This decline was confirmed by a decrease in the thermal alerts (Mirova, Modvolc, Modis, etc.)

 
Volcan Wolf - gas plume observed in overvieuw on 05/29/2015 - photos : B. Bernard, IGEPN

Volcan Wolf - gas plume observed in overvieuw on 05/29/2015 - photos : B. Bernard, IGEPN

 Wolf - location of the eruptive fissure and lava flows - in blue, path of the overview - Doc. IGEPN

Wolf - location of the eruptive fissure and lava flows - in blue, path of the overview - Doc. IGEPN

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