Since the 80s , the activity of Etna is characterized by frequent paroxysmal qualified episodes, traditionally made of three phases: a prelude and an increased level of activity, the
climax itself, the decline and cessation of eruptive activity . Each " peak " is different and characterized by its violence, its
duration, the point(s) of origin of the activity.
The year 2013 has been marked so
far by 20 paroxysmal episodes at the southeast crater of Etna. Browsing this episodes, no in details ...
what has been done in the course of the year, you can remove certain features or characteristics.
- 1. February 19 :
You can see a pyroclastic
flow during the climax phase of activity
- 2. February 20
- 3. February 20 :
Three paroxysmal episodes are recorded in
less than 36 hours , including two on the same day , which had not be seen since 2000.
Tremor peaks of 19 and 20 February 2013 - INGV Catania doc
Etna 20/02/2013 - doc. infalse-color NASA Ali swir
- 4. February 21
- 5. February 23 : the latter event is
marked by the smaller volume of lava emitted , but also abundant and localized pyroclastic materials falls. Near Linguaglossa, 15 km from the crater, there is slag of more than 20 cm.
Large
scoria found by Boris Behncke to Monte Baracca , the 02/25/2013 - photo B.Behncke / INGV
Etna - the climax of 23.02.2013 - Photo Sicilia turismo.it
- 6. February 27 to 28 : the 28.02, a fissure opens in the saddle between the old and
the new southeast cone.
Etna - the new mouth in the saddle between the two
south-east cones- Photo by Boris Behncke in early March .
Etna - lava flows of the last peak in February - Photo by
Boris Behncke, in early March
A beautiful series of 6 episodes for the month of
February !
- 7. March 5 and 6 : a fallout with slag
of size between 5 and 30 cm. on the Monti Sartorius .
Etna -
the Monti Sartorius covered by scoria - photo Boris Behncke / INGV 8 mars2013
- 8. March 16: a lot of scoria on
Zafferana Etnea, Santa Venerina and Acireale .
Etna - some webcam pictures of paroxysms of 05.03 and 16.03 - doc
. INGV
Etna - April 3, 2013 / 4:59 p.m. - webcam Etnatrekking
- 9. April 3
- 10. April 11 to 12
Etna 12.04 2013 - a spring plume - photo Turi Caggegi / Republica
- 11. April 18
- 12. April 20
- 13. 27-28 April
Etna - Map of the lava flows from
NSEC between February-March and 27 April 2013 - doc . INGV
Apart a small strombolian
activity on 3 and 6 September, was an interruption of the paroxysmal activity for about six months.
- 14. October 26 : where two craters are
active simultaneously, emitting plumes more or less loaded : the southeast crater (SEC) and the northeast crater (NEC)
Etna 26/10/2013 - left the plume NSEC - right , the NEC - photo Boris Behncke / NASA Earth Observatory
Etna 10/26/2013 - lighter gas plumes ( NSEC ) drifting towards the African coast, and ash-laden plume at different heights - Image Nasa / Oli
Note also the destruction of the remnants of
refuge and cottages of Torre del Fikosofo - article on this
blog
Etna - 26/10/2013 - Torre
del Filosofo coverd by the lava flows - photo Marco Nerri / via INGV
- 15. On 11 -12 November, with a phase of maximum
intensity of 7.5 hours.
Etna
- map of the lava flows of 11.11.2013 - and altitudes reached by the lava fronts - INGV
Etna -
the layout of the 11/13/2013 flows - photo Turi Caggegi
- 16. November 16 to 17
Etna - curve of tremor from 11 to
17/11/2013 , including two paroxysms - doc . INGV
Etna - changing of the topography of the NSEC between 13.01
and 11.17.2013 - photos by Boris Behncke
- 17. November 23 : Strombolian
activity is rapidly moving towards the stage of fountaining
Etna - the plume seen from Zafferana - photo Etna il Vulcano / Twitter / Facebook
- 18. November 28
Etna 11/28/2013 - photo Salvo Landro / via Etna Walk
- 19. On 2 - 3 december : a climax during which
there is more effusion .
Etna - 02.12.2013 / 23h - The different lava flows - photo Boris Behncke
- 20.
December 14 to 17 : the peak is characterized by a long total of 23 hours between the first explosion and the end of emission of ash, and a tremor that is slow to return to its original level ...
the comments are waiting from the observatory.
Etna - characterizing
curve of the tremor of the last peak - doc . INGV
Etna 16.12.2013 - strombolian activity and lava
flows - photo Turi Caggegi
Sources :
- divers rapports et photos de l'INGV Catania - link
- photos de Boris Behncke, Turi Caggegi et EtnaWalk
