T-LIDAR imaging of active faults - Does fault-surface roughness reflect repeated coseismic slip events?
Final Report Abstract
The main aims of our investigations are to analyze the tectonic geomorphology, paleoseismology, paleostress and paleoevents of known active faults that display postglacial fault scarps with groundbased static laser-scanning techniques (t-LiDAR - terrestrial Light Detection And Ranging). This allows us to reconstruct the faulting history along surface-rupturing scarps, and to test the potential of selected locations to calibrate the roughness-index method for active faults. Furthermore the backscattered signals are used for extracting features which indicate rupture history and for supervised classification of fault plane characters. LiDAR techniques are used for surface evaluation of limestone bedrock scarps and roughness analysis of the scarp surfaces. As the footwall of a normal fault undergoes continued uplift, the development of fault scarps by repeated earthquakes forms a steep polished fault plane (free face) that is subject to differential weathering over time (degradation, karstification, bio-erosion). Therefore, the upper parts of scarps are usually characterized by more intense weathering in comparison to the base. Goals of the LiDAR investigations are to reveal the slip history of known and dated active faults and to establish a relative age estimations for the coseismic slip events along limestone fault scarps in the Mediterranean region (Greece). Corresponding modular approaches were established for this, which include the virtual 3-D evaluation of data gained from several LiDAR data recording processes.
Publications
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2009. Terrestrial laser scanning of an active fault in Greece: Kaparelli Fault. 1st INQUA-IGCP-567 International Workshop on Earthquake Archaeology and Pälaeoseismology, Baelo Claudia, Spain. ISBN: 978-84-7484-217-3
Wiatr, T., Reicherter, K. & Papanikolaou, I.
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2009. Untersuchung von Massenbewegungen und Störungsflächen mit terrestrischem Laserscanning. 8. Oldenburger 3D-Tage
Wiatr, T.
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Application of terrestrial laser scanning (t-LiDAR) to characterize the morphology and morphotectonics of bedrock fault scarps in Greece. XIX Congress of the Carpathian-Balkan Geological Association CBGA 2010, Thessaloniki
Wiatr, T., Reicherter, K., Fernandez-Steeger, T. & Papanikolaou, I.
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Searching for paleo-earthquakes in bed-rock fault scarps with terrestrial laser scanning. 5th international terrestrial laser scanning user meeting 2010. Prague
Wiatr, T., Reicherter, K., Papanikolaou, I. & Fernandez-Steeger, T.
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Searching palaeoearthquakes in fault bedrock scarps based on reflectivity, erosion features and surface ruptures with terrestrial laser scanning. EGU General Assembly 2010, Vienna, EGU 2010- 10323
Wiatr, T., Reicherter, K., Papanikolaou, I. & Fernandez-Steeger, T.
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2011: Störungsflächen: Zeugnisse vergangener Erdbeben. Publikationen der Deutschen Gesellschaft für Photogrammetrie, Fernerkundung und Geoinformation (DGPF), Band 20, ISSN 0942-2870
Wiatr, T., Reicherter, K., Papanikolaou, 1., D. & Femandez-Steeger, T.
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A terrestrial close range remote sensing view of the normal fault zone near Archanes (Heraklion basin, Crete). In: Grützner, C et al. (eds.): Proceedings 2nd INQUA-IGCP7, International Workshop on Active Tectonics, Earthquake Geology, Archaeology and Engineering 19-24 September 2011, Corinth (Greece), ISBN: 978-960-466-093-3, 272-275
Wiatr, T., Papanikolaou, I.D., Reicherter, K. & Fernandez-Steeger, T.
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From terrestrial remote sensing to morphotectonics: Hard rock scarps on the Island of Crete, Greece. XVIII INQUA Bern 2011, Switzerland
Wiatr, T., Reicherter, K., Fernandez-Steeger, T. & Papanikolaou, I.
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Morphotectonics on bedrock scarps on the Island of Crete, Greece. EGU General Assembly 2011, Vienna, EGU 2011-10887
Wiatr, T., Reicherter, K., Fernandez-Steeger, T. & Papanikolaou, I.
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The backscattered signal from terrestrial LiDAR on an active normal fault scarp: The influence of inclination, range, resolution and degradation. Proceedings of the Workshop on Remote Sensing Methods for Change Detection and Process Modelling, Kölner Geographische Arbeiten 92, 173, 2011 Cologne
Wiatr, T., Oberröhrmann, M. & Reicherter, K.
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The discontinuity of a continuous fault: Delphi (Greece) In: Grützner, C. et al.(eds.): Proceedings 2nd INQUA-IGCP7, International Woritshop on Active Tectonics, Earthquake Geology, Archaeology and Engineering 19-24 September 2011, Corinth (Greece), ISBN: 978-960-466- 093-3, 276-279
Wiatr, T., Reicherter, K., Papanikolaou, I.D. & Fernandez-Steeger, T.
