Monitoring of gas and seismic energy release by multiparametric benthic observatory along the North Anatolian Fault in the Sea of Marmara (NW Turkey)

Embriaco, Davide; Marinaro, G.; Frugoni, F.; Monna, S.; Etiope, Giuseppe; Gasperini, Luca; Polonia, Alina; Bianco, Fabrizio Del; Ćaǧatay, M. Namık; Ülgen, Umut Barış; Favali, P.

doi:10.1093/gji/ggt436

Cited by 30 publications

(34 citation statements)

References 40 publications

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“…[] and Embriaco et al . []). In general, all these events have duration up to 1 or 2 s in the frequency range from 4 to 30 Hz with eventually one or two frequency peaks, highly variable amplitudes, and impulsive onset.…”

Section: Discussionmentioning

confidence: 99%

Character of seismic motion at a location of a gas hydrate‐bearing mud volcano on the SW Barents Sea margin

et al. 2014

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The Håkon Mosby mud volcano (HMMV) at 1270 m water depth on the SW Barents Sea slope has been intensively studied since its discovery in 1989. A variety of sensors monitored morphological, hydrological, geochemical, and biological parameters in the HMMV area. An ocean bottom seismometer deployment allowed us to register seismic motion for 2 years, from October 2008 to October 2010. The analysis of seismic records documents two types of seismic signals. The first type are harmonic tremors with frequency peaks around 4-5 and 8-10 Hz that occur in swarms. Their origin could be from fluid flow circulation or resonant vibrations of gas bubbles or from delayed movement of fluid-rich sediments in the conduit or in a deeper pseudo-mud chamber of the HMMV. Because swarms occur with a periodicity of~6 h, tide-related effects are suspected to influence the mechanism originating the tremors. The second type of signals are regional earthquakes that were in 15 cases recognized in seismic records. The activity of harmonic tremors was not significantly affected by earthquakes.

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Section: Discussionmentioning

confidence: 99%

Character of seismic motion at a location of a gas hydrate‐bearing mud volcano on the SW Barents Sea margin

et al. 2014

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“…Microevents, defined as short-duration events, have been also recorded by ocean bottom seismometers (OBS) deployed over soft sediments in the western part of the Sea of Marmara (Turkey). These microevents, characterized by durations of less than 0.8 s, were studied by Tary et al (2012) and were interpreted as generated by a source very close to the sensor and associated to episodes of gas discharge from the seabed (Embriaco et al, 2014), moving inside the soft sediments. These mechanisms seem similar to those active in the hydrothermal area of Pisciarelli and suggest that the anomalous seismicity of 1 December 2018 should be interpreted as an increase in the boiling activity of the mud pool.…”

Section: 1029/2019gc008610mentioning

confidence: 99%

Insight Into Campi Flegrei Caldera Unrest Through Seismic Tremor Measurements at Pisciarelli Fumarolic Field

Giudicepietro

Chiodini

Caliro

et al. 2019

Geochem Geophys Geosyst

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Within a general volcanic unrest in the densely urbanized area of Campi Flegrei caldera (Italy) an increase in the activity of Pisciarelli hydrothermal area is occurring. The seismic amplitude of Pisciarelli fumarolic tremor is a proxy for the fluid emission rate of the entire Solfatara‐Pisciarelli hydrothermal system. The long‐term analysis indicates a significant increase, by a factor of ~3 of the fumarolic tremor amplitude since May 2017. This increment matches with the trend of geochemical and seismic parameters observed in Campi Flegrei, therefore highlighting that Pisciarelli is a key site to monitor the volcanic unrest underway in this high‐risk caldera. The analysis of data from three closely spaced seismic stations provided new clues about the source mechanism of the tremor. Analyzing the fumarolic tremor amplitude we could also identify an episode of enlargement of the emission area close to the main fumarole of Pisciarelli. We propose a monitoring system based on the fumarolic tremor analysis, which provides real‐time information on the Pisciarelli hydrothermal activity and therefore on the current unrest in Campi Flegrei caldera.

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“…Such instruments are typically employed in the marine environment, in vertical casts, in horizontal profilers, or in benthic platforms (e.g., Marinaro et al 2006;Camilli and Duryea 2007;Newman et al 2008;Krabbenhoeft et al 2010;Gasperini et al 2012;Embriaco et al 2014). A review of the present technology is provided in Boulart et al (2010).…”

Section: Dissolved Gasmentioning

confidence: 99%

“…The occurrence of radionuclides, such as uranium and radium, in hydrocarbons is widely documented within the petroleum geochemistry literature (e.g., Durrance 1986;Hunt 1996). Radionuclides accumulate in petroleum deposits due to anoxic environments and chelation by organic molecules.…”

Section: Radiometric Surveysmentioning

confidence: 99%

Detecting and Measuring Gas Seepage

Etiope

2015

Natural Gas Seepage

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This chapter provides a representative overview of current methodologies for detection of gas seepage on Earth's surface, both on land and in aquatic environments (rivers, lakes, oceans). Most of the techniques described can be utilised to discover gas seepage independent of the study objective (i.e. whether for petroleum exploration, geo-hazards, or environmental studies). Most of these techniques can also be used to measure anthropogenic gas leaks, such as fugitive emissions from petroleum production and distribution facilities. Applications to petroleum exploration, as well as related interpretative tools and limits, with references to microseepage detection, are discussed in Chap. 5.The goal of this chapter is not (and cannot be) an exhaustive manual or review for all of the currently available surface seepage prospecting methods. As outlined in the sections below, several traditional techniques have been described in review papers. Here, a synthetic and synoptic picture for several currently available methodologies is provided, including the latest techniques and capabilities offered by new generation instruments. The discussion provided here focuses on direct gas detection methods. The use of gas seepage in petroleum exploration is outlined in Chap. 5. Indirect methods, including geophysical techniques and measurements of chemical, physical, or microbiological parameters in soils, water, rocks, or vegetation, modified by the presence of hydrocarbons, are briefly illustrated. Specific references, as well as a few case histories, are provided for those interested in a deeper reading of the technical details of sensing principles and instrumentation design. The detection of oil is not the objective of this book. Gas Detection MethodsAs illustrated in Fig. 4.1, gas seepage can be detected above the ground (atmospheric measurements), in the ground (soils and well head-space), and in water bodies (shallow aquifers, springs, rivers, bogs, lakes, and seas). Several of the methodologies are visually reviewed in the tree diagram shown in Fig. 4.2.

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Monitoring of gas and seismic energy release by multiparametric benthic observatory along the North Anatolian Fault in the Sea of Marmara (NW Turkey)

Cited by 30 publications

References 40 publications

Character of seismic motion at a location of a gas hydrate‐bearing mud volcano on the SW Barents Sea margin

Character of seismic motion at a location of a gas hydrate‐bearing mud volcano on the SW Barents Sea margin

Insight Into Campi Flegrei Caldera Unrest Through Seismic Tremor Measurements at Pisciarelli Fumarolic Field

Detecting and Measuring Gas Seepage

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