Piton de la Fournaise volcano (La Réunion): sudden drop in tremor / lava effusion - possible end of eruption
So, 18. Okt 2015, 08:3608:36 AM | VON: T
Images of lava bubbles from the main vent on 12 Oct (OVPF)
After a the eruption had intensified considerably during the past week, tremor suddenly dropped this morning at 08:02 local time and only showed sporadic pulses. The lava effusion seemed to have stopped as well. Aerial surveys this morning showed no more lava inside the vent.
Tremor evolution up until yesterday (OVPF)
Whether this is a temporary pause or a rather sudden (but not uncommon) end of the eruption will be clearer in the near future.
Up until yesterday (17 Oct), the eruption had been increasing, and generated again lava fountains from the main vent up to 40 m tall. The main vent itself had increased to reach approx. 100 m diameter, containing a lava lake which released large bubbles of gas (SO2), generating spectacular lava bubble ejections (images).
Fr, 16. Okt 2015, 05:54
The current, remarkably long-lived eruption continues with no signs of weakening. On the contrary, a significant increase in tremor and lava effusion was noted starting 12 Oct, reaching high values comparable to the start of the eruption. The observatory estimated the effusion rate to have risen from 9 to 13.5 cubic meters per second. Read all
Mi, 14. Okt 2015, 06:00
Piton de la Fournaise volcano (Reunion Island, France) - Smithsonian / USGS Weekly Volcanic Activity Report for 14 October-20 October 2015 (Continuing Activity)
OVPDLF reported that on 12 October there was a strong increase in tremor intensity at Piton de la Fournaise, with values reaching or exceeding those detected during the first few hours of the beginning of the eruption (24 August). A strong increase in sulfur dioxide emissions was also detected by a ground-based DOAS (Differential Optical Absorption Spectrometer); values on 2 October were 205 tonnes per day (t/d) and values on 12 October were 1,990 t/d. A satellite-based sensor recorded 1,138 t/d during 13-14 October which was twice the amount measured on 24 August. ... Read all