Activity Bulletin Monday, October 19, 2015 at 10:00 am (local time)
On october 18 at 8:02, the Tremor disappeared in a very brutal way.
The Tremor is a geophysical sign of surfacing and / or sub-surface magmatic fluids, the stop of this signal shows the end of the feed of lava.
Subsequently, however, we probably recorded sporadic signals in connection with the arrival of “puffs” of surface fluids (probably only gaseous). At present we still note the presence of background noise (tremor) on the Bory station.
The abrupt end of the supply is not an exceptional fact, this has already been observed in the past by the OVPF (in August 2003 for example).
Since Sunday the seismic activity picked up in the volcano also under the level of the sea.
Under these conditions, the Prefect of La Réunion decided the transition on phase SAFEGUARD of the specific device ORSEC on the Volcano Piton de la Fournaise, as of 8:00 this Tuesday, October 20, 2015.
Despite the termination of activity on the geo-physical point of view and the stop of the magma supply, an eruption is not excluded in the days or weeks ahead. Consequently, the prohibition of access to the top of the Enclos and helicopter landing in the volcano area remain in force until further notice.
During the safeguard phase, site investigations will be conducted to define the post-eruption dangerous areas and study the terms of a return in phase of vigilance.
21/10/2015. Piton de la Fournaise, La Réunion :
Source : OVPF, Fournaise info.
Photo: Fournaise info / Mamz’l Ha