Manuscript Topics

Seismoacoustic profiling is very important in geological and geotechnical recognition of the upper parts of the sea and ocean floor. Seismoacoustic methods are very precise, but their range is not too big and amounts to several dozens to several hundred meters. These methods use different types of profiling apparatus of varying design and purpose. Depending on the purpose of the research, various methods of excitation of acoustic waves (different sources) are used. Seismoacoustic waves are damped in proportion to their length. Long low-frequency waves have a deeper range but lower resolution. Short high-frequency waves have high resolution but are limited in penetration depth and are usually absorbed faster. The seismoacoustic investigations conducted within the upper parts of the sea-bottoms’ sediments provides a basis for separation of certain seismostratigraphic units, which refer strictly to the separate litostratigraphic levels of the analyzed geological period. An important aspect of the interpretation of seismic records is to analyze the degree of the acoustic energy absorption through the different layers of Quaternary sediments along with characterization of the records' texture. An important element in the analysis of seismoacoustic registrations is also the tracking of the leading acoustic horizons and the analysis of angular discordance of individual reflectors.

The special issue will present seismoacoustic profiling and interpretation of their results from the area of the Baltic Sea, the North Sea, the Black Sea, and the Mediterranean. The role of seismoacoustic profiling in the geotechnical characterization of the sea-bottoms is also significant because, conducted on a large-area and with a set accuracy, these tests can determine the limits of occurrence of particular soils that have specific physical and mechanical properties. The determination of seismoacoustic wave velocity in specific geological strata indicates their  density as one of the geotechnical parameters of the soils. An important aspect of seismoacoustic profiling for the geotechnical characterization of the seabed is to specify the thickness of geological layers, which can become a selected substrate for the foundation of specific marine constructions.

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