Stress-induced changes in hydrothermal gas discharges along active faults near Mt. Etna volcano (Sicily, Italy)

Sortino, Francesco; Giammanco, Salvatore; Bonfanti, P; Bottari, Carla

doi:10.1016/j.tecto.2022.229388

Cited by 3 publications

(6 citation statements)

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“…Its role is crucial in addressing gaps within historical seismic catalogs and in verifying or enhancing existing seismic historical records. Furthermore, it can also incorporate local site effects and geochemical analysis, as shown in the flowchart represented in [11,15,25]. As previously mentioned, local site effects provide insights into variations in ground shaking due to geological conditions specific to a given site.…”

Section: Discussionmentioning

confidence: 99%

“…During these events, CH 4 concentrations exceeded 20%, and H 2 S concentrations reached up to 993 ppm. CO 2 values remained elevated but relatively stable (see Figure 5) [25].…”

Section: Santa Venera Al Pozzo Case Studymentioning

confidence: 95%

“…In the field of geochemistry, these techniques find essential applications in the monitoring of gases in thermal sites. By examining the composition and flux of gases like carbon dioxide, sulfur compounds, and noble gases in geothermal areas, geochemists gain valuable insights into the subsurface dynamics of these thermal sites [24,25]. Continuous gas monitoring allows for the detection of changes in gas emissions, which can serve as early indicators of potential volcanic or geothermal activity.…”

Section: Geochemical Tecniquesmentioning

confidence: 99%

“…Initially, we conducted surveys of soil CO 2 emissions using the accumulation chamber method in the archaeological area and its vicinity over a two-year period to detect CO 2 emissions on a large scale along known or hidden faults [24]. Subsequently, from December 2017 to April 2019, we performed continuous monitoring of gas emissions (CO 2 , CH 4 , and H 2 S) through a microG-C at the site along with a water temperature survey at the Santa Venera al Pozzo thermal springs [25].…”

Section: Santa Venera Al Pozzo Case Studymentioning

confidence: 99%

“…Geophysical techniques, such as microzonation, ground motion modeling, and numerical analysis, characterize the seismic behavior of the site [21][22][23]. Additionally, geochemical analysis involves sampling and laboratory examination of fault-related indicators [24,25]. Integrating these disciplines enables archaeoseismologists to unveil the seismic source, enhancing the understanding of past seismic events and their impact on archaeological sites.…”

Section: Introductionmentioning

confidence: 99%

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Unraveling the Seismic Source in Archaeoseismology: A Combined Approach on Local Site Effects and Geochemical Data Integration

Bottari,

Capizzi,

Sortino

2024

Heritage

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Archaeoseismological research often deals with two unresolved questions: the magnitude and level of damage caused by past earthquakes, and the precise location of the seismic source. We propose a comprehensive review of an integrated approach that combines site effects with the analysis of geochemical data in the field of archaeoseismology. This approach aims to identify active buried faults potentially related to the causative seismic source and provide insights into earthquake parameters. For each integrated method, we report the foundational principles, delineation of theoretical field procedures, and exemplification through two case studies. Site effects analysis in archaeoseismology assumes a pivotal role in unraveling historical seismic occurrences. It enables estimating the earthquake magnitude, assessing the seismotectonic patterns, and determining the resulting damage level. Valuable data related to earthquake parameters can be extracted by analyzing vibration frequencies and acceleration measurements from structures within archaeological sites. This information is instrumental in characterizing seismic events, evaluating their impact on ancient structures, and enhancing our understanding of earthquake hazards within the archaeological context. Geochemical investigations supply indispensable tools for identifying buried active faults. The analysis of fluids and gases vented in proximity to faults yields valuable insights into their nature, activity, and underlying mechanisms. Faults often manifest distinctive geochemical imprints, enabling the differentiation between tectonically active and volcanically related fault systems. The presence of specific gases can further serve as indicators of the environmental conditions surrounding these fault networks. Integrating site effects analysis and geochemical investigations within archaeoseismological research is crucial to improving our understanding of unknown past earthquakes. Moreover, it enhances the seismic hazard assessment of the region under study.

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Section: Discussionmentioning

confidence: 99%

“…During these events, CH 4 concentrations exceeded 20%, and H 2 S concentrations reached up to 993 ppm. CO 2 values remained elevated but relatively stable (see Figure 5) [25].…”

Section: Santa Venera Al Pozzo Case Studymentioning

confidence: 95%

Section: Geochemical Tecniquesmentioning

confidence: 99%

Section: Santa Venera Al Pozzo Case Studymentioning

confidence: 99%