December 2005/ January 2006
|After the short eruption of November 29th 2005, the summit area inflated and the sismicity had the Volcanologic Observatory to deduce an upcoming eruption before the end of the year 2005. On December 26th, early afternoon, a sismic crisis alerts the volcanologists of an imminent eruption. Around 4pm, the sismic activity moved towards the Nez Coupé de Sainte-Rose, and a 150 meters long break opened arouns 5:15pm,close to the crater Faujas, at 2040 m of altitude. A few minutes after the beginning of the eruption, we arrived on site with Alain Gerente . This stage of the eruption stopped its activity around 8pm after 2h45, but the sismic|
|crisis goes on in the area of the Nez Coupé de Sainte-Rose.
Around 11pm, a second break opens at 1600meters of altitude in the rampart of Bois-Blanc situated down the Nez Coupé de Sainte-Rose, in the heights of the Osmunds Plain. The fountains of lava were particularly spectacular this night, creating a big redding cloud that could be seen till Mauritius Island, 200 kms from here.
On site at 5:30 am the day after, we noticed that several exit points were still active. Under the gas pressure, a fountain of lava of 70 m high was coming out of the most active exit point.
The very fluid lava flows kept their activity until the afternoon of December 28th, when the front of the flow reached 450 meters of altitude, 2,7 kilometers from the National Road.
The activity weakened during the following days. Small projections from the forming crater, have been observed, as well as some lava flows mostly under 1 km long.
A revival of the activity appeared on January 6th, and more between the 8th and 10th: the increase of the lava flow allowed the 4 to 5 km long flows to reach again the Grand Brûlé at 400 m high.
The activity suddenly slows down during the night of the 10th to the 11th.
The crater collapsed on itself and only a few samll flows couls be observed.
This type of residual avtivity lasted until the afternoon of january 18th, tha day the tremor stopped its activity announcing the end of the eruption.