TY  - GEN
A1  - Park, J.
A1  - Lühr, H.
A1  - Stolle, Claudia
A1  - Malhotra, G.
A1  - Baker, J. B. H.
A1  - Buchert, Stephan
A1  - Gill, R.
T1  - Estimating along-track plasma drift speed from electron density measurements by the three Swarm satellites
T2  - Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
N2  - Plasma convection in the high-latitude ionosphere provides important information about magnetosphere-ionosphere-thermosphere coupling. In this study we estimate the along-track component of plasma convection within and around the polar cap, using electron density profiles measured by the three Swarm satellites. The velocity values estimated from the two different satellite pairs agree with each other. In both hemispheres the estimated velocity is generally anti-sunward, especially for higher speeds. The obtained velocity is in qualitative agreement with Super Dual Auroral Radar Network data. Our method can supplement currently available instruments for ionospheric plasma velocity measurements, especially in cases where these traditional instruments suffer from their inherent limitations. Also, the method can be generalized to other satellite constellations carrying electron density probes.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 503 
KW  - ionosphere
KW  - plasma convection
Y1  - 2019
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-408417
SN  - 1866-8372
IS  - 503
ER  - 
TY  - JOUR
A1  - Kinscher, Jannes
A1  - Krüger, Frank
A1  - Woith, H.
A1  - Lühr, B. G.
A1  - Hintersberger, E.
A1  - Irmak, T. Serkan
A1  - Baris, S.
T1  - Seismotectonics of the Armutlu peninsula (Marmara Sea, NW Turkey) from geological field observation and regional moment tensor inversion
JF  - Tectonophysics : international journal of geotectonics and the geology and physics of the interior of the earth
N2  - The Armutlu peninsula, located in the eastern Marmara Sea, coincides with the western end of the rupture of the 17 August 1999, Izmit M-W 7.6 earthquake which is the penultimate event of an apparently westward migrating series of strong and disastrous earthquakes along the NAFZ during the past century. We present new seismotectonic data of this key region in order to evaluate previous seismotectonic models and their implications for seismic hazard assessment in the eastern Marmara Sea. Long term kinematics were investigated by performing paleo strain reconstruction from geological field investigations by morphotectonic and kinematic analysis of exposed brittle faults. Short term kinematics were investigated by inverting for the moment tensor of 13 small to moderate recent earthquakes using surface wave amplitude spectra. Our results confirm previous models interpreting the eastern Marmara Sea Region as an active transtensional pull-apart environment associated with significant NNE-SSW extension and vertical displacement. At the northern peninsula, long term deformation pattern did not change significantly since Pliocene times contradicting regional tectonic models which postulate a newly formed single dextral strike slip fault in the Marmara Sea Region. This area is interpreted as a horsetail splay fault structure associated with a major normal fault segment that we call the Waterfall Fault. Apart from the Waterfall Fault, the stress strain relation appears complex associated with a complicated internal fault geometry, strain partitioning, and reactivation of pre-existing plane structures. At the southern peninsula, recent deformation indicates active pull-apart tectonics constituted by NE-SW trending dextral strike slip faults. Earthquakes generated by stress release along large rupture zones seem to be less probable at the northern, but more probable at the southern peninsula. Additionally, regional seismicity appears predominantly driven by plate boundary stresses as transtensional faulting is consistent with the southwest directed far field deformation of the Anatolian plate. (C) 2013 Elsevier B.V. All rights reserved.
KW  - Seismotectonics
KW  - Moment tensor inversion
KW  - Brittle fault analysis
KW  - Morphotectonics
KW  - North Anatolian Fault Zone (NAFZ)
KW  - Marmara Sea
Y1  - 2013
U6  - https://doi.org/10.1016/j.tecto.2013.07.016
SN  - 0040-1951
SN  - 1879-3266
VL  - 608
IS  - 46
SP  - 980
EP  - 995
PB  - Elsevier
CY  - Amsterdam
ER  -