submitted to Geophys. J. Int. A reappraisal of active tectonics along the Fethiye-Burdur trend, southwestern Turkey Edwin Nissen1, Musavver Didem Cambaz2, Elyse´ Gaudreau1, Andrew Howell3;4, Ezgi Karasozen¨ 5;6, and Elena Savidge1;6 1 School of Earth and Ocean Sciences, University of Victoria, Victoria BC, Canada 2 Regional Earthquake Tsunami Monitoring Center, Kandilli Observatory and Earthquake Research Institute, Bogazic¸i˘ University, 34684 C¸engelkoy,¨ Istanbul,˙ Turkey 3 School of Earth and Environment, University of Canterbury, Christchurch 8140, New Zealand 4 GNS Science, Lower Hutt 5040, New Zealand 5 Alaska Earthquake Center, University of Alaska Fairbanks, Fairbanks, Alaska 99775, USA 6 Department of Geophysics, Colorado School of Mines, Golden, Colorado 80401, USA Received 2021 July 6; in original form 2021 July 6 This is a non-peer reviewed preprint posted to EarthArxiv. The manuscript was submitted to Geophysical Journal International on 6 July 2021, and subsequent versions may have slightly different content. The authors would welcome feedback, sent to
[email protected]. 2 E. Nissen et al. SUMMARY We investigate active tectonics in southwestern Turkey along the trend between Fethiye, near the eastern end of the Hellenic subduction zone, and Burdur, on the Anatolian plateau. Pre- viously, regional GPS velocity data have been used to propose either (1) a NE-trending zone of strike-slip faulting coined the Fethiye-Burdur Fault Zone, or (2) a mix of uniaxial and ra- dial extension accommodated by normal faults with diverse orientations. We test these mod- els against the available earthquake data, updated in light of recent earthquakes at Acıpayam (20 March 2019, Mw 5.6) and Bozkurt (8 August 2019, Mw 5.8) — the largest in this region in the last two decades — and at Arıcılar (24 November 2017, Mw 5.3).