Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/3720
DC Field | Value | Language |
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dc.contributor.authorall | Currenti, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia | en |
dc.contributor.authorall | Del Negro, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia | en |
dc.contributor.authorall | Johnston, M.; U.S. Geological Survey, Menlo Park, California, USA. | en |
dc.contributor.authorall | Sasai, Y.; Disaster Prevention Division, Tokyo Metropolitan Government, Tokyo, Japan. | en |
dc.date.accessioned | 2008-04-02T06:33:06Z | en |
dc.date.available | 2008-04-02T06:33:06Z | en |
dc.date.issued | 2007 | en |
dc.identifier.uri | http://hdl.handle.net/2122/3720 | en |
dc.description.abstract | The early stages of the 2002–2003 lateral eruption at Mount Etna were accompanied by slow changes (over some hours) and some rapid step offsets in the local magnetic field. At five monitoring locations, the total magnetic field intensity has been measured using continuously operating Overhauser magnetometers at a sampling rate of 10 s. The very unique aspect of these observations is the close temporal correspondence between magnetic field offsets and earthquakes that occurred in the upper northern flank of the volcano on 27 October 2002 prior to a primary eruption. Rapid coseismic changes of the magnetic field were clearly identified for three of the most energetic earthquakes, which were concentrated along the Northeast Rift at a depth of about 1 km below sea level. Coseismic magnetic signals, with amplitudes from 0.5 to 2.5 nT, have been detected for three of the largest seismic events located roughly midway between the magnetic stations. We quantitatively examine possible geophysical mechanisms, which could cause the magnetic anomalies. The comparison between magnetic data, seismicity and surface phenomena implies that piezomagnetic effects are the primary physical mechanism responsible for the observed magnetic anomalies although the detailed cause of the rapid high stress change required is not clear. The modeling of the observed coseismic magnetic changes in terms of piezomagnetic mechanism provides further evidence of the complex interaction between volcanic and tectonic processes during dike propagation along the Northeast Rift. | en |
dc.language.iso | English | en |
dc.publisher.name | AGU | en |
dc.relation.ispartof | Journal of Geophysical Research | en |
dc.relation.ispartofseries | /112 (2007) | en |
dc.subject | piezomagnetism | en |
dc.subject | earthquakes | en |
dc.title | Close temporal correspondence between geomagnetic anomalies and earthquakes during the 2002–2003 eruption of Etna volcano | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | B09103 | en |
dc.subject.INGV | 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring | en |
dc.identifier.doi | 10.1029/2007JB005029 | en |
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Kaneda (2004), 3-D finiteelement modelling of deformation and stress associated with faulting: Effect of inhomogeneous crustal structures, Geophys. J. Int., 157, 629– 644, doi:10.1111/j.1365-246X.2004.02200.x. Zlotnicki, J., and J. L. Le Mouel (1990), Possible electrokinetic origin of large magnetic variations at La Fournaise volcano, Nature, 343, 633– 635. Zlotnicki, J., and Y. Nishida (2003), Review on morphological insights of self-potential anomalies on volcanoes, Surv. Geophys., 24, 291–338. | en |
dc.description.obiettivoSpecifico | 3.6. Fisica del vulcanismo | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | reserved | en |
dc.contributor.author | Currenti, G. | en |
dc.contributor.author | Del Negro, C. | en |
dc.contributor.author | Johnston, M. | en |
dc.contributor.author | Sasai, Y. | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | en |
dc.contributor.department | U.S. Geological Survey, Menlo Park, California, USA. | en |
dc.contributor.department | Disaster Prevention Division, Tokyo Metropolitan Government, Tokyo, Japan. | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | restricted | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | - |
crisitem.author.dept | US Geological Survey, Menlo Park, CA, U.S.A. | - |
crisitem.author.dept | Earthquake Research Institute, University of Tokyo, Japan | - |
crisitem.author.orcid | 0000-0001-8650-5613 | - |
crisitem.author.orcid | 0000-0001-5734-9025 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
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