Etna activity February - March 2013: 8 paroxysms from New SE crater
Etna calm, two recent small earthquake swarms
Update Sun 31 Mar 13:28
At the surface, Etna remains calm. The current seismic signal and tremor values at the moment don't suggest a new paroxysm from the New SE crater is be expected very soon (although some paroxysms have shown build-up phases of less than a few hours only).
Current view of Etna (INGV webcam)
Depth vs time of recent earthquakes under Etna
Location of recent earthquakes under Etna
Interestingly, two weak earthquake swarms have occurred two days ago under the flanks of the volcano at opposite sides of the mountain: the first, weaker one, was at depths around 25 km under Monte Spagnolo on the NW flank, the second occurred shortly after at depths around 15 km under the area of Milo on the SE flank. The largest quake was a magnitude 2 event.
(We don't think these small swarms mean much, however.)
Update Sat 30 Mar 10:20
A visit to the summit area and current tremor levels showed the volcano is currently calm. No explosive activity was heard or seen from any of the summit craters.
Etna today (the dark patch above the New SE crater is a camera artifact, probably a dirty spot on the lens).
The area of bomb impacts from the last New SE crater paroxysm on 16 March was impressive - the whole area between Torre del Filosofo, the 2002-03 craters and the area of Cisternazza NE of the Cono del Lago was littered with bombs of various sizes (20-50 cm mostly). The Belvedere was found totally covered with scoria and bombs.
Update Wed 27 Mar 12:2910 days since the last paroxysm, tremor is still low and doesn't suggest a new eruption is imminent. Bad weather mostly prevented observations during the past days. No glow could be seen last night from any of the summit craters.
Update Tue 19 Mar 09:48
Beautiful snow-clad Etna remains restless. While the wait is on for a new SE crater paroxysm (which is likely to occur anywhere between days or few weeks from now), a few pronounced tremor spikes show up on the tremor graph. These probably correspond to strombolian activity from one of the summit craters, likely the Voragine.
Etna with the fresh black lava flows below the New SE crater this morning seen from Valle del Bove
Tremor signal (ETFI station, INGV)