Earth-prints repository, logo   DSpace

About DSpace Software
|earth-prints home page | roma library | bologna library | catania library | milano library | napoli library | palermo library
Please use this identifier to cite or link to this item:

Authors: Sgroi, T.*
Monna, S.*
Embriaco, D.*
Giovanetti, G.*
Marinaro, G.*
Favali, P.*
Title: Geohazards in the Western Ionian Sea: Insights from non-earthquake signals recorded by the NEMO-SN1 seafloor observatory
Title of journal: Oceanography
Series/Report no.: 2/27 (2014)
Publisher: The Oceanography Society
Issue Date: Jun-2014
DOI: 10.5670/oceanog.2014.51
Keywords: Undersea natural hazards
Seafloor instability
tectonic and volcanism
multidisciplinary data
non-earthquake signals
Mt. Etna and Western Ionian sea
Abstract: Seafloor instability resulting from both tectonics and volcanism affects the Western Ionian Sea. The NEutrino Mediterranean Observatory-Submarine Network 1 (NEMO-SN1), deployed 25 km offshore eastern Sicily at 2,100 m water depth, records a variety of signals for geophysical and environmental long-term monitoring, including non-earthquake seismic signals that provide insights into the area’s geohazards. The signals analyzed for this paper are: (1) seismic signals associated with submarine landslides, (2) volcanic tremor, and (3) short duration events (SDEs). These seismic signals are analyzed together with pressure and hydrophone data to help identify their origins. Tectonic shifts can lead to submarine landslides. Volcanic tremor is the result of sustained pressure fluctuations, probably related to stress variations induced by magma movement. Increased tremor amplitudes recorded at NEMO-SN1 during lava fountain episodes from February to April 2013 suggest the presence of an east-southeast offshore location of the roots of Mt. Etna’s magma feeding system. SDEs are thought to result from hydrofracturing of carbonate outcroppings at the base of the Malta Escarpment that is possibly induced by changes in the stress field associated with magma movement.
Appears in Collections:04.06.08. Volcano seismology
Papers Published / Papers in press

Files in This Item:

File Description SizeFormatVisibility
27-2_sgroi_Oceanography_2014.pdfMain article2.54 MBAdobe PDFonly authorized users View/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Share this record




Stumble it!



Valid XHTML 1.0! ICT Support, development & maintenance are provided by CINECA. Powered on DSpace Software. CINECA