October 26, 2015. EN. Rinjani, Taal, Piton de la Fournaise .

Home / blog georges Vitton / October 26, 2015. EN. Rinjani, Taal, Piton de la Fournaise .

October 26, 2015. EN. Rinjani, Taal, Piton de la Fournaise .

October 26, 2015.



Rinjani, île de Lombok  , Indonésie :


The West Nusa Tenggara authorities closed to the public the Rinjani National Park following an eruption of Mount Barujari to 10:45 (local time) on Sunday morning, with projections of materials up to 200 meters high. Hundreds of hikers and Hindu devotees coming to participate in a religious ceremony at the lake had to be evacuated.
The Barujari is in the same volcanic system than the the Rinjani caldera and contains a lake 230 meters deep. Its crescent shape is the result of the growth of Barujari in the eastern part of the caldera. In 1994, an eruption has further grow the volcano that now culminates at an altitude of 2300 meters above the level of the sea.

No significant seismic activity seems to have accompanied the explosion. The ash emission was too small to be detected on satellite data. The aviation alert level of the volcano was raised to Orange (VAAC Darwin).


« Be advised that there has been a small eruption of Rinjani at 10:45am this morning 25th October, 2015.

Those at the lake and trekking are being evacuated as a precaution.
Rinjani has been closed for all trekking until further notice. This also includes all hiking trails through the Rinjani National Park – either through Sembulan and Timbanuh, East Lombok, and Senaru and North Lombok – basically anywhere around the volcano is currently closed as a precaution. »


Rinjani volcano on the island of Lombok rises to 3726 m, second in height among Indonesian volcanoes only to Sumatra’s Kerinci volcano. Rinjani has a steep-sided conical profile when viewed from the east, but the west side of the compound volcano is truncated by the 6 x 8.5 km, oval-shaped Segara Anak (Samalas) caldera. The caldera formed during one of the largest Holocene eruptions globally in 1257 CE, which truncated Samalas stratovolcano. The western half of the caldera contains a 230-m-deep lake whose crescentic form results from growth of the post-caldera cone Barujari at the east end of the caldera. Historical eruptions dating back to 1847 have been restricted to Barujari cone and consist of moderate explosive activity and occasional lava flows that have entered Segara Anak lake.

Source : C Grandpey ( infolave) , The Gilis, Gili  air , GVP.

Photo : The Gilis – Gili Air, Gili Meno and Gili Trawangan , upside-art.com


Taal, Philippines:

October 26,  2015 , 08h00 :

Taal Volcano’s seismic monitoring network recorded three (3) volcanic earthquakes during the past 24 hours. Field measurements conducted on 22 October 2015 at the western sector of the Main Crater Lake yielded a decrease in water temperature of 33.2°C from 33.7°C, an increase in water level of 0.75 from 0.71 meter, and increase in acidity of pH 3.00 from 3.12. taal

Ground deformation measurements through precise leveling surveys on September 21 to October 1, 2015 indicated very slight deflation of the edifice compared to May-June 2015, consistent with slight deflation recorded by continuous GPS since September 2015. Both consistently show a general inflationary trend since January 2015. Carbon dioxide (CO2) emission at the Main Crater Lake decreased to 1566 tonnes/day in October 2015 from 2300 tonnes/day in July 2015.

Alert Level 1 remains in effect over Taal Volcano.

Source : Phivolcs .


Piton de la Fournaise :


Hardly the second phase of the eruption of August 24 completed, the Piton de la Fournaise snorts again. Since the cessation of activity on Saturday to 15 pm, the volcano observatory began recording again signs that might indicate that the volcano does not stop there: its sensors monitoring network recorded a « very slight seismicity « , indicated yesterday in the evening Philippe Kowalski, deputy director. This is mostly superficial events (slightly above the sea level), with some collapse in the Dolomieu crater. But a deep earthquake (- 6 km below the sea level) was also located.

A situation somewhat similar to that which then followed the end of the first phase of the eruption on Sunday one week ago. A plume rose intermittently yesterday still above the cone éruptif.La second phase of the eruption lasted less than forty-eight hours between 20 pm Thursday and Saturday around 15 hours. It ended almost as abruptly as the first, in minutes.

The volcano alert Orsec device (current eruption in the pen) was still in force last night. Access to the enclosure is prohibited, as is access to trails leading into the peak area of Bert, due to the fire caused by the cast in the wall and that affected the top. The Volcano Observatory facilities were affected and should be checked on Monday.

Source : Clicanoo.

Photo : FMA

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