Passive Seismic Experiment "13 BB Star" in the Margin of the East European Craton, Northern Poland

Monday, 15 December 2014
Marcin Polkowski1, Marek Grad1, Monika Wilde-Piórko1, Jerzy Suchcicki2 and Tadeusz Arant2, (1)University of Warsaw, Warsaw, Poland, (2)Institute of Geophysics Polish Academy of Sciences, Warsaw, Poland
Passive experiment "13 BB star" is dedicated to study deep structure of the Earth's interior in the marginal zone of the East European Craton in northern Poland. The seismic network consists of 13 broadband stations on the area of c. 120 km in diameter. The network is located in the area well recognized from the point of view velocities of sedimentary cover and crustal structure. Good records obtained since summer 2013, and expected during next 1.5 years long recording campaign, should yield images of detailed structure of the lithosphere-asthenosphere boundary (LAB), „410", "?520", and „660" km discontinuities, as well as mantle-core boundary and inner core. The LAB is investigated recently very effectively, mostly using seismic methods because their deep penetration and relatively good resolution. The nature of LAB is still debated, particularly under "cold" Precambrian shields and platforms. We show examples of local and teleseismic records, array transfer function of “13 BB star” network and preliminary noise analysis. National Science Centre Poland provided financial support for this work by NCN grant DEC- 2011/02/A/ST10/00284.