Shallow marine seismic surveys commonly rely on portable seismic sources such as small air-gun and high-frequency sparker sources, each characterized by distinct frequency content and imaging capabilities. While air-guns provide superior penetration depth and structural continuity, sparkers offer high vertical resolution for shallow subsurface imaging. Integrating these complementary datasets to obtain broadband seismic respon...

In this study, the spatial variations in total organic carbon (TOC), stable carbon isotopes (δ¹³Corg), C/N ratios, and nitrogen isotopes (δ¹⁵Norg) in East Sea sediments are examined to elucidate the sources, preservation, and diagenetic processes of organic matter. To this end, surface sediment samples were collected from the coastal regions of the East Sea using a box corer and analyzed for TOC, TON, stable isotopes (δ¹³C, δ¹...

Recently, the seabed classification method based on back-scattering data of multi-beam echo-sounder (MBES) is widely used to analyze the distribution of seabed sediment. Although various analysis methods for seabed classification using multi-spectral MBES have been developed, they are limited in securing penetration depth to consider the characteristics of the shallow subsurface structure. In this study, the seabed and ultra-s...