Overblog
Suivre ce blog
Editer la page Administration Créer mon blog

Earth of fire

Actualité volcanique, Article de fond sur étude de volcan, tectonique, récits et photos de voyage

Publié par Bernard Duyck
Publié dans : #Actualités volcaniques

Following a high level of explosive activity at the NE and NO crater, and a strong degassing of the central crater of Stromboli, Emergency Preparedness has closed the access to the summit on August 5.

Between 9:13 and 17:23, on August 5, deformation of the outer flanks of the northeast crater has been detected ... the location is important for the following events.

 

Stromboli - lava flow 06/08/2014 - photo Dolcevitagroup / pic.twitter.com-SfOpQ2w7gl

Stromboli - lava flow 06/08/2014 - photo Dolcevitagroup / pic.twitter.com-SfOpQ2w7gl

On August 6, a new lava flow began with an overflow between the N1 and N2 vents / crater northeast. The beginning of the lava flow coincides with collapses between 2:06 p.m. and  2:51 p.m.. The emission of lava is made in several successive castings, who joined the coast line. The effusive activity continued overnight juqu'aux early hours on August 7.
 

   Stromboli -  seismicity, between 4am and 7am loc. , with an increase to 5:15 - Doc INGV

Stromboli - seismicity, between 4am and 7am loc. , with an increase to 5:15 - Doc INGV

On August 7, a significant collapse accompanied the opening of a new effusive mouth, to 5h 18, at the northern base of the NE crater. A rising tremor confirmed the schedule (see above).

Stromboli - thermal anomaly from 5:30 am to 5:36 loc - doc Webcam therm. INGV / via VolcanodiscoveryStromboli - thermal anomaly from 5:30 am to 5:36 loc - doc Webcam therm. INGV / via Volcanodiscovery

Stromboli - thermal anomaly from 5:30 am to 5:36 loc - doc Webcam therm. INGV / via Volcanodiscovery

Stromboli - 07.08.2014 / 6:23 local - three lava streams enter the sea and others will get there - Doc. INGV Catania - camera SCT

Stromboli - 07.08.2014 / 6:23 local - three lava streams enter the sea and others will get there - Doc. INGV Catania - camera SCT

A large thermal anomaly marked the slope at the base of the NE crater, indicating a new flood of lava. It had to cross the ledge, created in 2002-2003, which separates the cone northern from the rim of Sciara del Fuoco, then plunged into the sea.

The effusion ratio is high, and much higher than those characterizing the overflows of previous years; in a short time, the flow is separated into various arms of lava, accompanied by landslides. The arrival of the flow at sea generated significant plumes of steam.
The thermal anomaly was still clearly visible on the local thermal webcam 16h.

Stromboli - Time-lapse video of the overflow of August 6 and 7 - Doc. Volcanodiscovery

Stromboli - lava flow and blocks reaching the sea by the Sciara del Fuoco, 08/07/2014 - photo Mike Schuler

Stromboli - lava flow and blocks reaching the sea by the Sciara del Fuoco, 08/07/2014 - photo Mike Schuler

Stromboli - 07/08/2014 - lots of lava entries in the sea generate steam plumes - photo website Meteoweb

Stromboli - 07/08/2014 - lots of lava entries in the sea generate steam plumes - photo website Meteoweb

Stromboli - thermal anomaly at 6:36 a.m and 1:48 p.m. - Doc. webcam therm. INGVStromboli - thermal anomaly at 6:36 a.m and 1:48 p.m. - Doc. webcam therm. INGV

Stromboli - thermal anomaly at 6:36 a.m and 1:48 p.m. - Doc. webcam therm. INGV

Sources :

- INGV Catania

- Volcanodiscovery news

- You reporter.it

 

To Etnathe eruption of subterminal type that marks the NE crater continues a month after its beginning.

Boris Behncke describes the activity during a field visit on August 6: it varies between powerful Strombolian explosions, the "flashing arcs" ,and "almost silent" ash and bombs emissions
.

 

Etna - explosion to the Northeast crater 06/08/2014 - photo EtnaWalk

Etna - explosion to the Northeast crater 06/08/2014 - photo EtnaWalk

 Etna - lava flow from the activity at the NEC 08/06/2014 - photo Boris Behncke

Etna - lava flow from the activity at the NEC 08/06/2014 - photo Boris Behncke

.  Etna - smoke ring on 08/06/2014 - photo turi Caggegi / iEtna

. Etna - smoke ring on 08/06/2014 - photo turi Caggegi / iEtna

Sources :

- Boris Behncke / Facebook & You Tube

- EtnaWalk / Facebook

- Turi Caggegi / iEtna

Articles récents

Hébergé par Overblog