THE 20th JULY 2017 (22:31 UTC) BODRUM/KOS EARTHQUAKE AND TSUNAMI; POST TSUNAMI FIELD SURVEY REPORT Ahmet Cevdet Yalçınera, Alessandro Annunziatob, Gerassimos Papadopoulosc, Gozde Guney Dogana, Hasan Gokhan Gulera, Tarık Eray Cakird, Ceren Ozer Sozdinlere, Ergin Ulutasf, Taro Arikawag, Lutfi Suzenh, Utku Kanoglui, Isikhan Gulera, Pamela Probstb, Costas Synolakisj, aMiddle East Technical University, Department of Civil Engineering, Ocean Engineering Research Center, Turkey bJoint Research Centre, European Commission, Ispra Site, Italy cNational Observatory of Athens, Institute of Geodynamics, Greece dTurkish Chamber of Civil Engineers, Bodrum Branch, Turkey eBogazici University, Department of Geophysics, Kandilli Observatory and Earthquake Research Institute, Turkey fKocaeli University, Department of Geophysical Engineering, Turkey gChuo University, Department of Civil and Environmental Engineering, Japan hMiddle East Technical University, Department of Geological Engineering, Turkey iMiddle East Technical University, Department of Aerospace Engineering, Turkey jUSC, LA, USA, Technical University of Crete, Greece Correspondence: [email protected], [email protected], [email protected] August 17, 2017 (new version) Update History Version 0.0 as preliminary report (containing quick survey results (performed on July 22- 24, 2017) has been publicized on July 28, 2017 which is available at http://users.metu.edu.tr/yalciner/july-21-2017-tsunami-report/Report-Field-Survey-of-tsunami- effects-at-S-of-Bodrum-Peninsula.docx Version 1.0 as complete report results (performed on July 28-August 03, 2017) has been publicized on August 10, 2017 which is available at http://users.metu.edu.tr/yalciner/july-21-2017-tsunami-report/Report-Field-Survey-of- July-20-2017-Bodrum-Kos-Tsunami-ver-01.pdf Version 2.01 as complete extended report (This report) has been publicized on August 17, 2017 which is available at http://users.metu.edu.tr/yalciner/july-21-2017-tsunami-report/Report-Field-Survey-of- July-20-2017-Bodrum-Kos-Tsunami.pdf In this version a new chapter (Chapter 8 prepared by Prof. Dr. Taro Arikava, Research Assistant Hasan Gokhan Guler and Prof. Dr. Ahmet Cevdet Yalciner) is added and a typo in a coordinate on page 20 is corrected. TABLE OF CONTENTS ABSTRACT ........................................................................................................................................................ 6 1. INTRODUCTION........................................................................................................................................ 7 2. EARTHQUAKE INFORMATION .................................................................................................................. 9 3. FIELD OBSERVATIONS ON TSUNAMI SUMMARY .................................................................................... 11 4. FIELD OBSERVATIONS IN BODRUM AND SURROUNDINGS ..................................................................... 15 4.1. Tsunami Information from Datça Peninsula.................................................................................... 34 5. FIELD OBSERVATIONS ON TSUNAMI AT SOUTH OF KARAADA (BLACK ISLAND) ...................................... 35 6. FIELD OBSERVATIONS ON TSUNAMI AT GOKOVA BAY (AKYAKA VILLAGE) ............................................. 39 7. FIELD OBSERVATIONS ON TSUNAMI AT KOS ISLAND ............................................................................. 42 7.1. North Coast (between 27.20733 / 36.89026 and 27.27983 / 36.91567) ........................................ 45 7.2. North Coast (between 27.27983 / 36.91567 and the port) ............................................................. 47 7.3. The Kos Port..................................................................................................................................... 50 7.4. Between Kos port and Louros Cape ................................................................................................. 68 7.5. Between Louros Cape and Agiou Foca ............................................................................................ 78 8. EVACUATION INVESTIGATION AGAINST KOS-BODRUM EARTHQUAKE AND TSUNAMI İN TURKEY · BODRUM ........................................................................................................................................................ 87 8.2. Outline of questionnaire survey ................................................................................................................ 88 9. DISCUSSIONS AND CONCLUSIONS .......................................................................................................... 93 10. ACKNOWLEDGEMENTS .......................................................................................................................... 94 APPENDIX A: List of Measurements at Bodrum .............................................................................................. 96 APPENDIX B: IDSL Test in Bodrum .................................................................................................................. 98 APPENDIX C: List of Measurements done at Kos ......................................................................................... 101 APPENDIX D: Field Reporting Tools ............................................................................................................. 103 APPENDIX E: Reference Material Questionnaire.......................................................................................... 107 LIST OF FIGURES AND TABLES Figure 1.1: A bathymetric map around Kos and Bodrum ........................................................................................ 8 Figure 2.1: Fault mechanisms of main shock and aftershocks by KOERI ................................................................ 9 Figure 2.2: Earthquake Intensity Map produced by ELER (KOERI) (M6.6) (Source: ELER-v3.1: http://www.koeri.boun.edu.tr/Haberler/NERIES%20ELER%20V3.1_6_176.depmuh) ......................................... 10 Figure 2.3: Sea Level in Bodrum ............................................................................................................................ 11 i Figure 4.1: The motion of tsunami at eastern end of Gumbet Bay (Municipality café is at 27.408503E 37.029732N). .............................................................................................................................................................................. 16 Figure 4.2: View of sea withdrawal in Gumbet Bay about three hours after the earthquake .............................. 17 Figure 4.3: Penetration of the waves through the dried stream bed near Ayaz Hotel ......................................... 18 Figure 4.4: Observer showing the flow depth by his foot (37.031412N 27.406703E) .......................................... 18 Figure 4.5: View of the stream bed that the tsunami inundated (27.407821E 37.029761N) ............................... 19 Figure 4.6: View of damaged boats and coastline of Gumbet Bay ....................................................................... 21 Figure 4.7: Damaged minibus and advertisement board ...................................................................................... 21 Figure 4.8: Big hole appeared at Yaliciftlik Bay after the earthquake (27.527908E 36.992786N) ........................ 22 Figure 4.9: Boundary of the tsunami observation at the western end of the Southern Coastline of Bodrum Peninsula according to eyewitnesses (27.264562E 36.964772N) ......................................................................... 24 Figure 4.10: View of inundation line at Meteor Beach (27.278796E 36.966191N) .............................................. 24 Figure 4.11: Schematic view of wave motion in Akyarlar Bay (27.290930E 36.967359N).................................... 26 Figure 4.12: Wave traces in the stream bed, Karaincir Bay (27.300718E 36.973574N) ....................................... 27 Figure 4.13: Wave trace on the sidewalls of the road, Karaincir Bay (27.300718E 36.973574N) ......................... 28 Figure 4.14: Debris material accumulated, Karaincir Bay (27.30041E, 36.97433N) ............................................. 28 Figure 4.15: Maximum inundation distance in Karaincir Bay along the streambed ............................................. 29 Figure 4.16: Schematic view of the inundation at Karaincir Bay (27.300496E 36.972961N) ................................ 30 Figure 4.17: Water level sign observed at La Brezza Beach, western part of Karaincir Bay (27.300179E, 36.969923N) .......................................................................................................................................................... 31 Figure 4.18: Damaged Pier in Aspat Bay (27.312356E 36.979592N) .................................................................... 32 Figure 4.19: Schematic view of wave inundation at Bitez Bay (27.383582E 37.025615N) ................................... 33 Figure 4.20: Inundation at Bitez Beach (27.366069E 37.02439N) ........................................................................ 34 Figure 5.1: Kucukpoyraz Gravel Beach at Karaada (Black Island) a) view from the shore b) view from the beach .............................................................................................................................................................................. 37 Figure 5.2: Small gravels found in the gaps between the rock surfaces at Kucukpoyraz Beach, Karaada (Black Island)