The Etna MIROVA thermal anomaly data for 5 July 2018 through March 2019 showed a spike in thermal activity from lava flows and increased Strombolian activity in late August and during December 2018. Strombolian activity, with modest ash emissions, continued from the Bocca Nuova, NSEC, and NEC during the first three weeks of December.
Small collapses of portions of the lava field also produced minor plumes of ash. Black hatch lines outline the edge of the summit craters: BN = Bocca Nuova, with the north-western depression (BN-1) and the south-eastern depression (BN-2); VOR = Voragine; NEC = Northeast Crater; SEC = Southeast Crater; NSEC = New Southeast Crater.
Yellow circles are degassing vents, and red circles are vents with Strombolian activity and/or ash emissions.
The cooling lava field from the E vent scoria cone at NSEC is shown in yellow; the red flows were active on 17 December 2018.
Courtesy of INGV (Report 51/2018, ETNA, Bollettino Settimanale, 10/12/2018 - 16/12/2018, data emissione 18/12/2018).
Activity during 29 July-4 August consisted of a few episodes of ash emissions at Bocca Nuova Crater and NEC.