Publication Date:
2017-04-04
Description:
This study concerns measurements of radon and thoron emissions from soil carried out in 2004 on the
eastern flank of Mt. Etna, in a zone characterized by the presence of numerous seismogenic and aseismic
faults. The statistical treatment of the geochemical data allowed recognizing anomaly thresholds for both
parameters and producing distribution maps that highlighted a significant spatial correlation between
soil gas anomalies and tectonic lineaments. The seismic activity occurring in and around the study area
during 2004 was analyzed, producing maps of hypocentral depth and released seismic energy. Both
radon and thoron anomalies were located in areas affected by relatively deep (5e10 km depth) seismic
activity, while less evident correlation was found between soil gas anomalies and the released seismic
energy. This study confirms that mapping the distribution of radon and thoron in soil gas can reveal
hidden faults buried by recent soil cover or faults that are not clearly visible at the surface. The correlation
between soil gas data and earthquakes depth and intensity can give some hints on the source of gas and/or on fault dynamics.
Description:
Published
Description:
863-870
Description:
1.2. TTC - Sorveglianza geochimica delle aree vulcaniche attive
Description:
1.4. TTC - Sorveglianza sismologica delle aree vulcaniche attive
Description:
3.1. Fisica dei terremoti
Description:
4.5. Studi sul degassamento naturale e sui gas petroliferi
Description:
JCR Journal
Description:
reserved
Keywords:
radon
;
fault
;
seismic hazard
;
Etna
;
03. Hydrosphere::03.04. Chemical and biological::03.04.05. Gases
;
03. Hydrosphere::03.04. Chemical and biological::03.04.07. Radioactivity and isotopes
;
03. Hydrosphere::03.04. Chemical and biological::03.04.08. Instruments and techniques
;
04. Solid Earth::04.01. Earth Interior::04.01.99. General or miscellaneous
;
04. Solid Earth::04.04. Geology::04.04.99. General or miscellaneous
;
04. Solid Earth::04.04. Geology::04.04.09. Structural geology
;
04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry
;
04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous
;
04. Solid Earth::04.07. Tectonophysics::04.07.99. General or miscellaneous
;
04. Solid Earth::04.08. Volcanology::04.08.99. General or miscellaneous
;
05. General::05.08. Risk::05.08.99. General or miscellaneous
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
Permalink