Blar i forfatter "Domel, Przemyslaw"

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    • Event recognition in marine seismological data using Random Forest machine learning classifier 

      Domel, Przemyslaw; Hibert, Clément; Schlindwein, Vera; Plaza-Faverola, Andreia (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-16)
      Automatic detection of seismic events in ocean bottom seismometer (OBS) data is difficult due to elevated levels of noise compared to the recordings from land. Popular deep-learning approaches that work well with earthquakes recorded on land perform poorly in a marine setting. Their adaptation to OBS data requires catalogues containing hundreds of thousands of labelled event examples that currently ...

    • Local Seismicity and Sediment Deformation in the West Svalbard Margin: Implications of Neotectonics for Seafloor Seepage 

      Domel, Przemyslaw; Plaza Faverola, Andreia Aletia; Schlindwein, Vera; Bünz, Stefan (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-12-12)
      In the Fram Strait, mid-ocean ridge spreading is represented by the ultra-slow system of the Molloy Ridge, the Molloy Transform Fault and the Knipovich Ridge. Sediments on oceanic and continental crust are gas charged and there are several locations with documented seafloor seepage. Sedimentary faulting shows recent stress release in the sub-surface, but the drivers of stress change and its influence ...

    • Origin and Periodic Behavior of Short Duration Signals Recorded by Seismometers at Vestnesa Ridge, an Active Seepage Site on the West-Svalbard Continental Margin 

      Domel, Przemyslaw; Singhroha, Sunny; Plaza-Faverola, Andreia; Schlindwein, Vera; Ramachandran, Hariharan; Bünz, Stefan (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-02)
      Short duration events (SDEs) are reported worldwide from ocean-bottom seismometers (OBSs). Due to their high frequency (4–30 Hz) and short duration, they are commonly attributed to aseismic sources, such as fluid migration related processes from cold seeps, biological signals, or noise. We present the results of a passive seismic experiment that deployed an OBS network for 10-month (October 2015–July ...

    • Seismicity of the western-Svalbard margin and its relationship with near surface fluid flow and seepage systems - A study using ocean bottom seismometers 

      Domel, Przemyslaw (Doctoral thesis; Doktorgradsavhandling, 2023-09-28)
      Methane, a high potential greenhouse gas, travels as a fluid and releases as a gas in large quantities from the seafloor. This seepage impacts marine ecosystems and in specific cases, it has potential to reach the atmosphere, and therefore affect the climate. Gas seepage is documented worldwide, but there are still large unknowns regarding seepage dynamics, faulting/fracturing of the sediments and ...

    • Stress Constraints From Shear-Wave Analysis in Shallow Sediments at an Actively Seeping Pockmark on the W-Svalbard Margin 

      Singhroha, Sunny; Schramm, Bettina; Plaza Faverola, Andreia Aletia; Domel, Przemyslaw; Dannowski, Anke; Cooke, Frances Ann; Bünz, Stefan (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-28)
      Mechanisms related to sub-seabed fluid flow processes are complex and inadequately understood. Petrophysical properties, availability of gases, topography, stress directions, and various geological parameters determine the location and intensity of leakage which change over time. From tens of seafloor pockmarks mapped along Vestnesa Ridge on the west-Svalbard margin, only six show persistent present-day ...