Constraints on crustal and mantle structure of the oceanic plate south of Iceland from ocean bottom recorded Rayleigh waves

• Main Authors: Frederik J. Tilmann, Torsten Dahm
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2007
• Subjects: Mid-Atlantic Ridge; Iceland; North Atlantic; North East Atlantic
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.555.3449; http://bullard.esc.cam.ac.uk/~tilmann/tilmann08_tecto_author.pdf

From April to July 2002 we carried out a deployment of 6 ocean bottom seismometers and 4 ocean bottom hy-drophones in the North Atlantic south of Iceland. During the deployment period we recorded clear Rayleigh waves from 2 regional and 14 teleseismic earthquakes. This cor-responds to a Rayleigh wave detection rate of nearly 92% for events with MW ≥6.0 and epicentral distance less than 110◦, close to detection rate estimates based on noise level variability. We measured Rayleigh wave event-station group dispersion and inter-station phase dispersion for one Mid-Atlantic Ridge event. The group dispersion curve is sensitive to the structure of the North-East Atlantic with an average age of ∼39 Myr. The phase dispersion curve is sensitive to the structure just south of Iceland (average