A small seismic crisis beneath the summit of Piton de la Fournaise lasted a little more than two and a half hours on 15 August. Deformation was also detected at the top of Dolomieu and, coupled with the increase in seismicity, prompted OVPDLF to raise the Alert level to 1. Public access to the summit was prohibited. On 18 August, the Alert Level was lowered because seismicity had decreased and deformation was no longer detected.
Source: Observatoire Volcanologique du Piton de la Fournaise (OVPDLF) – “Reports provided courtesy of the Smithsonian’s Global Volcanism Program and the US Geological Survey’s Volcano Hazards Program.”