4.-11. March 2007: Phreatic Explosions at the Lava Delta
The high flow rates of the 2007 Stromboli's effusive eruption caused phreatic explosions and steam jets from the sea. All times are local (GMT + 1hr). Focal length of the lenses used on a digicam is given (to be multiplied by 1.5 to obtain the equivalent focal length on 24x36 film).
6 March, 16h, f=300mm. 50m high jet of sea-water steam erupts dark blocks which, a few seconds later, plunge in the sea (right).
6 March, 16h, f=300mm. Often big explosions at sea level eject hot bombs which leave a characteristic steam trail (note small ones at right).
10 March, 5h40m-6h00m, f=300mm. Explosions of incandescent bombs at a lava entry in the sea. After 20 minutes the explosions stopped.
10 March, 6h20, f=300mm. 20 minutes later, explosions started again: note steam rising from boiling water at right.
4 March, 16h, f=135mm. A steam fountain, 50m tall, ejecting incandescent bombs which leave a steam trail. Photos taken 2 seconds apart.
11 March, 17h, f=300mm. Steam columns rise higher and higher from the sea and take on the strangest shapes.
11 March, 17h, f=300mm. The lava flow (incadescent blocks at left) continues to enter the sea, causing a steam jet. Note seagull for scale.
11 March, 18h, f=300mm. The same jet of sea-water steam seen during twilight: note bombs plunging in the sea at right.
|Copyright: M. Fulle.