Get our newsletter!
Check out our volcano tours on VolcanoAdventures.com!
Volcanoes & Earthquakes - new app for Android
Volcanoes & Earthquakes - app for iPhone & iPad

Guaranteed tours:
2-17 May 2019: From Krakatau to Bali - Java (Indonesia)
4-11(12) May 2019: Fascination Volcano - Santorini Island, Greece
4-12 May 2019: From Stromboli to Etna - Eolian Islands + Etna volcano (Italy)
18-26 May 2019: From Stromboli to Etna - Eolian Islands + Etna volcano (Italy)
25 May - 1 Jun 2019: Etna Discovery - Etna volcano (Italy)
7-12 Jun 2019: Adventure Volcano - Yasur Volcano Travel - Tanna Island (Vanuatu)
15-30 Jun 2019: From Krakatau to Bali - Java (Indonesia)
8-23 Jul 2019: From Krakatau to Bali - Java (Indonesia)
3-18 Sep 2019: From Krakatau to Bali - Java (Indonesia)
12-20 Oct 2019: From Stromboli to Etna - Eolian Islands + Etna volcano (Italy)
: ruimten beschikbaar / : gegarandeerd / : enkele spaties links / : geboekt uit
Willekeurige foto 's

Stromboli eruption 2007: a new propagating fracture opening on the Sciara del Fuoco?

9 March: At around 15:30, the summit activity ceases and a new effusive vents opens on the Sciara at about 500 m elevation, feeding a vicous lava flow (see previous photo page).
During the following hour, a strange phenomenon is observed about 8-10 times: streaks of rolling clouds of white vapour and brown dust clouds appear on the Sciara along a straight line beneath the new vent. These clouds move steadily downslope for hundreds of meters. Each is more intense than the preceding one and propagates further downslope, almost reaching the shore.  Lacking a video camera, we've put together several still pictures taken at 0.2 second distance during several such episodes. Is this mark a new fracture cutting across the Sciara del Fuoco caused by the instrusion of new lava or a movement of a large block of the Sciara itself?
This phenomenon lasted for about 1 hour only, but became more and more vigorous. Towards the end of this period, we also observed another, inquieting thing: brown clouds of dust were whirled up by something happening on the Sciara in the sector hidden behing the crest of the Sciara at our side and next to the other lava flow. Was this a parallel fracture opening up here as well, thus cutting a huge slice into the Sciara? We can only guess... Later on, rockfalls from the front of the new lava flow, as well as seemingly movements along what we believe might be a a new opening fracture turned loose material into small pyroclastic flows (see next photo page). After about 6:30pm, both pyroclastic flows and the appearance of these white and brown steam and dust clouds ceased.



Coulds of vapour and dust whirled up from a line below the flow front, perhaps by a propagation of the fracture downhill.
Coulds of vapour and dust whirled up from a line below the flow front, perhaps by a propagation of the fracture downhill.
Propagating steam and dust cloud (1)
Propagating steam and dust cloud (1)
Propagating steam and dust cloud (2)
Propagating steam and dust cloud (2)
Propagating steam and dust cloud (3)
Propagating steam and dust cloud (3)
The Sciara with the new flow is quiet between two pulses of fracture opening
The Sciara with the new flow is quiet between two pulses of fracture opening

Low-res gif animations from still pictures

Opening fracture on the Sciara - Sequence 1 (10 still pictures covering 2 seconds)
Opening fracture on the Sciara - Sequence 1 (10 still pictures covering 2 seconds)
Opening fracture on the Sciara - Sequence 2 (13 still pictures covering 2.5 seconds)
Opening fracture on the Sciara - Sequence 2 (13 still pictures covering 2.5 seconds)
 

Meer op VolcanoDiscovery:

Copyrights: VolcanoDiscovery en andere bronnen zoals.
Materiaalgebruik: Tekst en afbeeldingen op deze website zijn auteursrechtelijk beschermd. Verdere reproductie en gebruik zonder toestemming is niet ingestemd. Als u licentierechten voor foto's, bijvoorbeeld voor publicaties en commercieel gebruik, neem dan contact met ons op.