August 07 , 2017. EN. Kilauea , Piton de la Fournaise , Sabancaya , Popocatepetl .

Home / blog georges Vitton / August 07 , 2017. EN. Kilauea , Piton de la Fournaise , Sabancaya , Popocatepetl .

August 07 , 2017. EN. Kilauea , Piton de la Fournaise , Sabancaya , Popocatepetl .

August 07 , 2017.


Kilauea , Hawai :

19°25’16 » N 155°17’13 » W,
Summit Elevation 4091 ft (1247 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Activity Summary:
Kīlauea Volcano continues to erupt within its summit caldera and from the Puʻu ʻŌʻō vent on its East Rift Zone. Webcam views show continued circulation and spattering within the summit lava lake, as well as fluctuations in lava lake surface level; overall, the lake surface level does not appear to have changed significantly since yesterday. Summit tiltmeters recorded gradual inflationary tilt through yesterday. The inflationary trend reversed early this morning and a small deflationary tilt has since been recorded at the summit. Active surface flows from episode 61g persist southeast of Puʻu ʻŌʻō on the shield above the pali. Active surface breakouts of lava continue on the coastal plain, as lava from the 61g flow continues to enter the ocean at Kamokuna. The surface lava flows pose no threat to nearby communities. There have been no significant changes in seismic activity across the volcano.


Summit Observations:
Webcam views show the circulation and spattering of the lake surface, as well as small fluctuations in lake surface level while summit tiltmeters recorded gradual inflationary tilt through the past day. Early this morning, a reversal in summit tilt appears to mark the onset of more summit DI (Deflationary/Inflationary) cycling. Low levels of seismic activity continue. Elevated sulfur dioxide emission rates persist. Webcam views of the lava lake do not reflect significant overall changes in lava lake surface level since yesterday.

L’image contient peut-être : ciel, nuage, plein air et nature

Puʻu ʻŌʻō Observations:
Webcam images continue to show persistent glow from long-term sources at Puʻu ʻŌʻō. Low levels of seismic activity and surface deformations continue through the past day. Puʻu ʻŌʻō tiltmeters reversed their trend yesterday morning and have since been recording small inflationary tilt. The sulfur dioxide emission rate from the East Rift Zone vents has been steady over the past several months and remains significantly lower than the summit emission rate.

Lava Flow Observations:
The episode 61g flow is active and entering the ocean at Kamokuna. Surface lava flow activity persists on the upper portion of the flow field above the pali. Webcam views show minor breakouts continuing on the coastal plain.


L’image contient peut-être : montagne, eau, plein air et nature

The Kamokuna ocean entry continues to add area to the new delta of land, but stress fractures continue to grow in width, and likely indicate a bench collapse in the near future.

Continued slow slumping of seaward portions of the delta have been noted, along with formation and widening of cracks extending parallel to the coast. One crack spans the entire width of the delta. As recently as the afternoon of July 28, a small slice of the delta slowly collapsed and fell piecemeal into the ocean. The potential for larger-scale delta collapses persists.


Source : HVO

Photos : David Ford , Bruce Omori.


Piton de la Fournaise , La Réunion :

Activity Bulletin of Sunday, August 6, 2017 at 3:30 pm (Local Time).

The eruption begun on July 14 at 00:50 local time continues. The volcanic tremor (indicator of surface eruptive intensity) continues its gradual decline (Figure 1).


Figure 1: Evolution of the RSAM (volcanic tremor and eruption intensity indicator) between 00:00 (20h UTC) on July 14th and 15h00 (11h00 UTC) on August 6th on the seismic station of RVL, located on the flank South of the volcano. (© OVPF / IPGP)

In the field, the activity essentially continues in lava tunnels with some visible surface resurgences on a small spatial extension. Nevertheless, in the late afternoon of August 5, a more substantial opening in the lava tunnel occurred. It was particularly visible from the OVPF and IRT webcams, feeding a lava flow over several hundred meters for several hours.

Gas emissions remain high.


L’image contient peut-être : montagne, nuage, ciel, plein air et nature

– No earthquakes have been recorded in the past 24 hours.
– The trend towards a slight recovery in inflation observed over the past few days on deformation sensors, in particular GPS, is confirmed.

Estimations carried out using satellite methods via the HOTVOLC platform (OPGC – Clermont Ferrand) report minimum flows between <1 and 2 m3 / s.

Source : OVPF

Photo : Christophe Chapelle


Sabancaya , Peru :

New explosion in Peru’s Volcán Sabancaya the ashes continue to fall .

4 AUGUST 2017. A new explosion rocked the Sabancaya volcano in the Arequipa region of Peru on Friday morning. At 8:49 the explosion produced a column of smoke and gases, which reached 3,000 meters above the base of the crater . But what has really concerned the risk management authorities is the ash fall.
According to the Technical-Scientific Committee for the Management of the Volcanic Risk of Arequipa, which issued the alert, the areas affected by this phenomenon will be the districts of Achoma, Yanque, Coporaque and Chivay, located in the province of Caylloma. In addition, it recorded that the radius of dispersion is calculated in more than 40 kilometers of distance and that the ashes are directed towards the southwest and northwest of the volcano, which is the second most active in the country.

The entity also recalled that, in addition to environmental problems, ash affects people’s health. That is why he recommended the use of masks to protect the airways, as well as lenses to keep the eyes safe. Authorities continue to assess the situation and presence of ash in water, soil and air. This is the second explosion in less than a week. On Wednesday, the volcano registered another outburst and also alerted on the dispersion of ashes.


L’image contient peut-être : nuage, montagne, ciel, plein air et nature

According the most recent weekly follow-up report , presented Monday by the Geophysical Institute of Peru and the Volcanological Observatory of the Geological, Mining and Metallurgical Institute, the explosive activity continued to increase from 24 to 30 July. On average, there were 40 bursts per day and eruptive columns of gases and ashes also grew compared to the previous week reaching a height of about 5,000 kilometers above the crater.

In addition, said the report, those that predominate are earthquakes associated with fluid movement (long period) and ash emission (tremor) continue. Because « eruptive activity is increasing, » the report says, it is likely that the trend will continue over the next few days. Hence he recommended not to approach a radius less than 12 kilometers from the crater and keep the doors and windows of houses closed.



Photo : IGP Peru.


Popocatepetl , Mexico :

6 August, 11.00 (6 August, 16.00 GMT)

Over the past 24 hours, the monitoring systems of the Popocatépetl volcano have identified 45 low-intensity emissions and a small explosion, accompanied by emissions of water vapor, gas and small amounts of ash, and That of two explosions on the 5th of August, at 12:26 and 15:08 h.
During the night, continuous steam and gas emissions were observed.


From this morning onwards, a slight emission of gas with a north-westerly direction is observed and, up to the time of this report, there is no continuous visibility due to cloud conditions.
CENAPRED exhorts not to approach the volcano and especially the crater.

The volcanic warning semaphore of the Popocatépetl volcano is located in Amarillo Phase 2.


Source : Cenapred.

Photo : Erik Gomes Tachimani.

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