August 28 , 2017. EN.  Aira ( Sakurajima) , Dukono , Bogoslof , Piton de la Fournaise .

Home / aira / August 28 , 2017. EN.  Aira ( Sakurajima) , Dukono , Bogoslof , Piton de la Fournaise .

August 28 , 2017. EN.  Aira ( Sakurajima) , Dukono , Bogoslof , Piton de la Fournaise .

August 28 , 2017.

 
Aira , Kyushu , Japan :

31.593°N, 130.657°E
Elevation 1117 m

JMA reported 26 events at Showa Crater (at Aira Caldera’s Sakurajima volcano) during 18-21 August, one of which was explosive. Material was ejected as high and as far as 500 m. Ash plumes rose as high as 1.7 km above the crater rim. The Alert Level remained at 3 (on a 5-level scale).

The Sakurajima presents on the morning of 23 August a strombolian-type activity, with continuous projections several tens of meters high, at the Showa crater.
According to the JMA, between August 10 and 14, 44 eruptive episodes marked the Showa crater, one of which was described as explosive; It was accompanied by an ejection of materials at a height of 500 meters, and a plume rising to 1,800 meters above the crater.
The alert level remains at 3, on a scale of 5.

The Aira caldera in the northern half of Kagoshima Bay contains the post-caldera Sakurajima volcano, one of Japan’s most active. Eruption of the voluminous Ito pyroclastic flow accompanied formation of the 17 x 23 km caldera about 22,000 years ago. The smaller Wakamiko caldera was formed during the early Holocene in the NE corner of the Aira caldera, along with several post-caldera cones. The construction of Sakurajima began about 13,000 years ago on the southern rim of Aira caldera and built an island that was finally joined to the Osumi Peninsula during the major explosive and effusive eruption of 1914. Activity at the Kitadake summit cone ended abo

Source: Japan Meteorological Agency (JMA) , GVP , B Duick.

Photos : Koki Arima.

 

Dukono , Indonesia :

VOLCANO OBSERVATORY NOTICE FOR AVIATION – VONA

Issued :20170827/2147Z
Volcano : Dukono (268010)
Current Aviation Colour Code : ORANGE
Previous Aviation Colour Code : orange
Source :Dukono Volcano Observatory
Notice Number : 2017DUK233
Volcano Location : N 01 deg 41 min 35 sec E 127 deg 53 min 38 sec
Area : North Maluku, Indonesia
Summit Elevation : 3933 FT (1229 M)

Volcanic Activity Summary :
Eruption with volcanic ash cloud at 2142 UTC (0642 local).

Volcanic Cloud Height :
Best estimate of ash-cloud top is around 4893 FT (1529 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer.

Other Volcanic Cloud Information :
Ash cloud moving to West.

Remarks :
Eruption and ash emission is continuing.

Source : VSI/Magma

 

Bogoslof , Alaska :

53°55’38 » N 168°2’4″ W,
Summit Elevation 492 ft (150 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Following the short duration explosive eruption that occurred at 23:08 UTC (15:08 AKDT) August 27 and lasted about 2 minutes, satellite images show a small eruption cloud to about 26,000 ft above sea level drifting southeast. Since this event, seismicity and infrasound as detected on neighboring islands has been quiet and no lightning has been detected.

The National Weather Service Alaska Aviation Weather Unit issued a SIGMET for this eruption. Status of the ash cloud forecast can be found at the AAWU website at http://aawu.arh.noaa.gov/.

Source : AVO

 

Piton de la Fournaise , La Réunion :

Activity Report for Sunday, August 27, 2017 at 3:00 pm (local time).

The eruption that began on July 14 at 00:50 local time continues. The volcanic tremor (indicator of surface eruptive intensity) has decreased markedly in the last 24 hours (factor 2 about the RVL station).

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 27th on the RVL seismic station, located on the flank South of the volcano. (OVPF / IPGP)

– Thirteen volcano-tectonic earthquakes were recorded under the southeast area of the pen during yesterday’s day.
– No distortion is noticeable on the last days.

The low flows observed did not allow reliable estimates of the flow of lava through the use of satellites.

Source : OVPF
Photo : OVPF

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