August 01 , 2017. EN. Piton de la Fournaise , Cleveland , Sabancaya , Sinabung .

Home / Alaska / August 01 , 2017. EN. Piton de la Fournaise , Cleveland , Sabancaya , Sinabung .

August 01 , 2017. EN. Piton de la Fournaise , Cleveland , Sabancaya , Sinabung .

August 01 , 2017.


Piton de la Fournaise , La Réunion :

Activity bulletin of Monday 31 July 2017 at 16h15 (Local time).

The eruption begun on July 14 at 00:50 local time continues. The intensity of the volcanic tremor (indicator of surface eruptive intensity) has remained stable since July 28th, equivalent to about 50% of the observed value at the beginning of the eruption (Figure 1).


Figure 1: Evolution of the RSAM (volcanic tremor and eruption intensity indicator) between 00:00 (20h UTC) on July 14th and 16h00 (12h00 UTC) on July 31st on the RVL seismic station, located on the flank South of the volcano. (© OVPF / IPGP)

– No earthquakes have been recorded in the past 24 hours.
– The trend observed on deformation sensors, in particular GPS, seems to stabilize or reverse (to deflation). This parameter will be followed in the next few days.


L’image contient peut-être : nuit et ciel

Estimates carried out by satellite methods via the HOTVOLC platform (OPGC – Clermont Ferrand) show a minimum flow rate of 1-2 m3 / s.

Source : OVPF

Photo : Frederic Leveneur.


Cleveland , Alaska :

52°49’20 » N 169°56’42 » W,
Summit Elevation 5676 ft (1730 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Elevated surface temperatures were observed in satellite images over the past day, consistent with either slow growth of the lava dome or cooling of recently erupted lava. Clear web-camera views from yesterday showed persistent steaming from the summit crater. No activity was detected in seismic or infrasound data from Cleveland in the past 24 hours.


AVO Image

Cleveland volcano is monitored with a limited real-time seismic network, which inhibits AVO’s ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data.

Source : AVO

Photo : Lyons, John; Schmitt, Joe , 04 /08/ 2015 , 12:00


Sabancaya , Peru :

Explosive activity continues to increase. During this period, an average of 40 explosions / day was recorded with maximum displacement values of 75 cm2. Earthquakes associated with the uplift of magmatic (hybrid) materials have
Decreased while earthquakes associated with fluid movements (long period) and ash emissions (Tremor) continue to predominate.

Résultat de recherche d'images pour "sabancaya"

Eruptive gas and ash columns increased in number during the previous week, reaching an altitude of about 5000 m above the crater, and then dispersed within a radius of more than 50 km, mainly in the direction Northwest and South East.
The GPS station, located to the south-east of the volcano, showed no significant changes related to the possible deformation of the volcano.
The flow of volcanic gas (SO2), recorded on July 28, reached a maximum value of 2530 tons / day.
The Mirova satellite system detected 9 thermal anomalies, with VRP values (radiated volcanic power) of 1 MW to 16 MW.

On the whole, eruptive activity increased. This trend could be maintained over the next few days.


Source : IGP

Photo : Photovolcanica.


Sinabung , Indonesia :

Volcano Observatory Notice for Aviation (VONA):

Last Issued: August 01 , 2017
Current Aviation Color Code:ORANGE

Volcanic Activity Summary:
Hot clouds at 00:45 UTC (07:45 local time). The event lasted for 176 seconds.
Volcanic Cloud Height:
Best estimate of ash-cloud top is around 14272 FT (4460 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer.
Other Volcanic Cloud Information:
East – northeast
Seismic activity is characterized by the Deep Volcanic Earthquake, Low Frequency Earthquake, and Hybrid Earthquake. Rock avalanche (Incandescent lava) is not identified


Kegempaan Sinabung


G.Sinabung’s level of activity remains at Level IV (Awas)

Community and visitors / tourists should not operate within a radius of 3 km around the summit, 7 km in the South – East sector, 6 km in the East – South – East sector, and At a distance of 4 km in the north-east sector of Sinabung. And the people who live near the rivers that spill from Sinabung must remain vigilant about the potential dangers of lahars.


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

The materials formed a dam upstream on the Laborus River. People who live and move around the watershed downstream must maintain vigilance because these dams can collapse at any time, resulting in downstream lahar / flooding. BPBDs Tanah Karo will immediately disaster or flood threat for people who live and move downstream along and around the Laborus River.

Source : VSI , Magma .

Photo : Sadrah Peranginangin

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