Rengin Gok

Staff Scientist
Atmospheric, Earth, and Energy Division
Email: gok1@llnl.gov
Phone: +19254231563

Program manager for Seismic Cooperation Program.

Expert in developing and improving seismic monitoring in the Middle East, Central Asia, Southeast Asia and the Caucasus region. Develops seismic hazard and risk assessment models.  Builds partner capacity for the Comprehensive Nuclear-Test-Ban Treaty implementation.  Lead Coda Calibration Tool (CCT) for reliable moment magnitudes of smaller size seismic events. Expert in modernizing seismic networks by supporting local monitoring center capability and equipment capacity. Other research interests are regional wave propagation and attenuation, velocity structure of lithosphere, seismic source behavior, earthquake scaling, velocity tomography, shear-wave splitting, earthquake legacy data.

Selected Publications

W. Abdulnaby, T. Onur, R. Gök et al. (2020) Probabilistic seismic hazard assessment for Iraq. J Seismol.  24, doi:10.1007/s10950-020-09919-2

T. Onur, R. Gök, T. Godoladze, I. Gunia, G. Boichenko, A. Buzaladze, N. Tumanova, M. Dzmanashvili, L. Sukhishvili, Z. Zavakhishvili, et al. (2020). Probabilistic seismic hazard assessment using legacy data in Georgia, Seismological Research Letters 91, doi:10.1785/0220190331.

W. R. Walter, S.-H. Yoo, K. Mayeda, and R. Gök (2017) Earthquake stress via event ratio levels: Application to the 2011 and 2016 Oklahoma seismic sequences, Geophysical Research Letters 44 (7): 3147–3155

T. Onur, R. Gök, Wathiq Abdulnaby, Hanan Mahdi, Nazar M. S. Numan, Haydar Al-Shukri, Ammar M. Shakir, Hussein K. Chlaib, Taher H. Ameen, and Najah A. Abd (2017) A comprehensive earthquake catalog for Iraq in terms of moment magnitude, Seismologica Research Letters 88 (3): 798–811

R. Gök, A. Kaviani, E. M. Matzel, M. E. Pasyanos, K. Mayeda, G. Yetirmishli, I. El-Hussain, A. Al-Amri, F. Al-Jeri, T. Godoladze, D. Kalafat, E. A. Sandvol, and W. R. Walter (2016) Moment Magnitudes of Local/Regional Events from 1D Coda Calibrations in the Broader Middle East Region, Bulletin of the Seismological Society of America 106 (5): 1926–1938

M. E. Pasyanos, R. Gök and W. R. Walter (2016) 2D Variations in Coda Amplitudes in the Middle East, Bulletin of the Seismological Society of America 106 (5): 1915–1925

A. Pitarka, R. Gök, G. Yetirmishli, S. Ismayilova, and R. Mellors (2016) Ground Motion Modeling in the Eastern Caucasus, Pure and Applied Geophysics 173 (8): 2791–2801

A. Kaviani, E. Sandvol, X. Bao, G. Ruempker, and R. Gök (2015) The structure of the crust in the Turkish-Iranian Plateau and Zagros using Lg Q and velocity, Geophysical Journal International 200 (2): 125–1266

R. J. Mellors, J. Jackson, S. Myers, R. Gök, K. Priestley, G. Yetirmishli, N. Turkelli, and T. Godoladze (2012) Deep Earthquakes beneath the Northern Caucasus: Evidence of Active or Recent Subduction in Western Asia (vol 102, pg 862, 2012), Bulletin of the Seismological Society of America 102 (3) 1288

S. Al-Hashmi, R. Gök, K. Al-Toubi, Y. Al-Shijbi, I. El-Hussain, and A. J. Rodgers (2011) Seismic velocity structure at the southeastern margin of the Arabian Peninsula, Geophysical Journal International 186 (2): 782–792

R. Gök, R. J. Mellors, E. Sandvol, M. Pasyanos, T. Hauk, R. Takedatsu, G. Yetirmishli, U. Teoman, N. Turkelli, T. Godoladze, and Z. Javakishvirli (2011) Lithospheric velocity structure of the Anatolian plateau-Caucasus-Caspian region, Journal of Geophysical Research-Solid Earth 116

J. Julia, A. A. Nyblade, R. Durrheim, L. Linzer, R. Gök, P. Dirks, and W. Walter (2009) Source Mechanisms of Mine-Related Seismicity, Savuka Mine, South Africa, Bulletin of the Seismological Society of America 99 (5): 2801–2814

R. Gök, L. Hutchings, K. Mayeda, and D. Kalafat (2009) Source Parameters for 1999 North Anatolian Fault Zone Aftershocks, Pure and Applied Geophysics 166 (4): 547–566

P. Morasca, K. Mayeda, R. Gök, W. S. Phillips, and L. Malagnini (2008) Coda and direct-wave attenuation tomography in northern Italy, Bulletin of the Seismological Society of America 98 (4): 1936–1946

R. Gök, H. Mahdi, H. Al-Shukri, and A. J. Rodgers (2008) Crustal structure of Iraq from receiver functions and surface wave dispersion: implications for understanding the deformation history of the Arabian-Eurasian collision, Geophysical Journal International 172 (3) 1179–1187

M. E. Pasyanos, H. Tkalcic, R. Gök, A. Al-Enezi, and A. J. Rodgers (2007) Seismic structure of Kuwait, Geophysical Journal International 170 (1) 299–312

R. Gök, M. E. Pasyanos, and E. Zor (2007) Lithospheric structure of the continent-continent collision zone: eastern Turkey, Geophysical Journal International 169 (3) 1079–1088

W. R. Walter, K. Mayeda, R. Gök, A. Hofstetter, R. Abercrombie, A. McGarr, G. DiToro, and H. Kanamori (2006) The scaling of seismic energy with moment: Simple models compared with observations, Earthquakes: Radiated Energy and the Physics of Faulting 170, 25–41

K. Mayeda, R. Gök, W. Walter, and A. Hofstetter (2005) Evidence for non-constant energy/moment scaling from coda-derived source spectra, Geophysical Research Letters 32 (10): MAY 21 2005

J. Xie, R. Gök, J. Ni, and Y. Aoki (2004) Lateral variations of crustal seismic attenuation along the INDEPTH profiles in Tibet from Lg Q inversion, Journal of Geophysical Research-Solid Earth 109, B10, OCT 21 2004

R. Gök, E. Sandvol, N. Turkelli, D. Seber, and M. Barazangi (2003) Sn attenuation in the Anatolian and Iranian plateau and surrounding regions, Geophysical Research Letters 30 (24)

R. Gök, J. Ni, M. West, E. Sandvol, D. Wilson, R. Aster, W. Baldridge, S. Grand, W. Gao, F. Tilmann, and S. Semken (2003) Shear wave splitting and mantle flow beneath LA RISTRA, Geophysical Research Letters 30

R. Gök, N. Turkelli, E. Sandvol, D. Seber, and M. Barazangi (2000) Regional wave propagation in Turkey and surrounding regions, Geophysical Research Letters 27 (3): 429–432