Processing seismic waves emanating from the ocean bottom
Iban Rodríguez Barbarin, a telecommunications engineer from Pamplona, has carried out a study on processing seismic waves emanating from the ocean’s floor. The study is the subject of his graduate thesis, ’Ocean Bottom Seismometers (OBS) processing with refraction seismology’.
The study was carried out within a wider research and development project by investigators at Navarre Public University, jointly with scientists from the Vilanova i la Geltru Centre for Technology, part of the Polytechnic University of Catalonia and the Sea Sciences Institute, which is part of the CSIC.
Acquisition of OBS
The project started a few years ago when the Barcelona-based Sea Sciences Institute acquired devices known as Ocean Bottom Seismometers, the purpose of which was to collect seismic signals from the ocean’s floor. The idea was to introduce into the peninsula submarine refraction seismic techniques, novel at the time in comparison with other seismological techniques, whether land or marine.
Due to rapid technological development, those OBS became obsolete, to which problem was added the considerable loss of the devices underwater. All this pointed to devising an alternative, custom-made technology for OBS.
This is where the project carried out by the Catalan research centres and the Navarre Public University came into play. Specifically, the Navarre research team has worked both on the reception and suitable processing of the signals collected as well as the processing of the information provided by them in order to facilitate their interpretation by seismologists and geologists.
The first steps were to find specific information on land and marine seismological activity in the widest possible manner. Then, the researchers involved themselves in adapting known tools and techniques to the problem, a labour that was developed in the graduate thesis.
In this way, signals were processed which facilitated the Catalan researchers to identify the various layers of the ocean bed, eliminating noise wherever possible.
During the processing phase two types of signals have to be taken into account: passive signals, which are produced naturally, and active ones, which are produced via stimuli. Researchers worked on the latter.
The last part of the project lays out the main conclusions on the various techniques developed: amongst others, signal detection, including OBS itself.
Iñaki Casado Redin
Nafarroako Unibertsitate Publikoa
(+34) 948 16 97 82
All news from this category: Communications Media
Engineering and research-driven innovations in the field of communications are addressed here, in addition to business developments in the field of media-wide communications.
innovations-report offers informative reports and articles related to interactive media, media management, digital television, E-business, online advertising and information and communications technologies.
For the first time, researchers visualize metabolic process at the single-cell level
Understanding cellular metabolism – how a cell uses energy- could be key to treating a wide array of diseases, including vascular diseases and cancer. While many techniques can measure these…
Tailored laser fields reveal properties of transparent crystals
Research team led by the University of Göttingen investigates surface magnetisation. The surface of a material often has properties that are very different from the properties within the material. For…