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 Earth Surface And Interior (329A): People
Zhen  Liu's Picture
Jet Propulsion Laboratory
M/S 300-233
4800 Oak Grove Drive
Pasadena, CA 91109
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Zhen Liu

  • B.S. in Geophysics, University of Science & Technology of China (1994)
  • M.S. in Solid Earth Geophysics, Graduate School of Chinese Academy of Sciences (1997)
  • PhD in Geophysics and Space Physics, University of California at Los Angeles (2003)

Research Interests
  • Investigating crustal deformation in southern California and Japan at different spatial and temporal scales using GPS and InSAR
  • Understanding neotectonics and lithosphere dynamics at convergent plate boundaries through the combination of numerical modeling approaches with data from seismology, geodesy, and geology
  • Estimating seismic hazard from tectonics and understanding earthquake dynamics


ARIA is a collaborative project between JPL and Caltech to develop data systems and data products based on radar, GPS, and seismic observations for hazard science and response.

NASA-ISRO Synthetic Aperture Radar, or NISAR, is a satellite radar mission run jointly by NASA and the Indian Space Research Organization (ISRO) that will survey Earth’s changing ecosystems, dynamic surface, and ice masses.

UAVSAR, is a reconfigurable, polarimetric L-band synthetic aperture radar (SAR), is specifically designed to acquire airborne repeat track SAR data for differential interferometric measurements.

Selected Awards
  • NASA Group Achievement Award (2014)
  • AGU Outstanding Student Paper, Tectonophysics Section (2003)
  • UCLA Graduate Fellowship, University of California at Los Angeles (2002)
  • Dean's list of the Best Graduate, Chinese Academy of Sciences (1997)

Selected Publications
  1. Yue, H., Z. Ross, C. Liang, S. Michel, H. Fattahi, E. Fielding, A. Moore, Z. Liu, B. Jia, 2017, The 2016 Kumamoto Mw = 7.0 earthquake: A significant event in a fault-volcano system. J. Geophys. Res.: Solid Earth, 122, 9166-9183. 2017JB014525.
  2. Y. Jiang, Z. Liu, E. Davis, S. Schwartz, T. Dixon, N. Voss, R. Malservisi, M. Protti, 2017, Strain release at trench during shallow slow slip: The example of Nicoya Peninsula, Costa Rica, Geophysical Research Letter, 44, doi:10.1002/2017GL072803.
  3. Crowell, B., Y. Bock, Z. Liu, 2016, Single-station automated detection of transient deformation in GPS time series with the relative strength index: A case study of Cascadian slow-slip, J. Geophys. Res., 121, doi:10.1002/2016JB013542.
  4. Daout, S., S. Barbot, G. Peltzer, M. P. Doin, Z. Liu, R. Jolivet, 2016, Constraining the kinematics of metropolitan Los Angeles faults with a slip-partitioning model, Geophysical Research Letter, 43, 11,192-11,201, doi:10.1002/2016GL071061.
  5. Liu, Z., A. Moore, S. Owen, 2015, Recurrent slow slip event reveals the interaction with seismic slow earthquakes and disruption from large earthquake, Geophys. J. Int., 202, 1555-1565, doi: 10.1093/gji/ggv238.
  6. Fu, Y., Z. Liu, J. Freymueller, 2015, Spatiotemporal variations of the slow slip event between 2008 and 2013 in the southcentral Alaska subduction zone, Geochemistry, Geophysics, Geosystems, 2450-2461, doi: 10.1002/2015GC005904.
  7. Xue, L., S. Schwartz, Z. Liu, and L. Feng, 2015, Interseismic megathrust coupling beneath the Nicoya Peninsula, Costa Rica, from the joint inversion of InSAR and GPS data, J. Geophys. Res. Solid Earth, 120, doi:10.1002/2014JB011844.
  8. Farr, T., Z. Liu, 2015, Monitoring Groundwater in the Central Valley of California with Interferometric Radar, AGU Chapman Monograph for remote sensing, 397-406, doi:10.1002/9781118872086.ch24.
  9. Liu, Z., S. Owen, A. Moore, 2014, Rapid estimate and modeling of permanent coseismic displacements for large earthquakes using high-rate GPS data, Seism. Res. Lett., 85(2), 284-294, doi:10.1785/0220130174.
  10. Liu, Z., H. S. Jung, Z. Lu, 2014, Joint correction of ionosphere noise and orbital error in L-band SAR interferometry of interseismic deformation in southern California, IEEE Transactions on Geosciences and Remote Sensing, 52(6), 3421-3427, doi: 10.1109/TGRS.2013.2272791.
  11. Lundgren, P., M. Poland, A. Miklius, T. Orr, S.-H. Yun, E. Fielding, Z. Liu, A. Tanaka, W. Szeliga, S. Hensley, and S. Owen (2013), Evolution of dike opening during the March 2011 Kamoamoa fissure eruption, Kılauea Volcano, Hawaii, J.  Geophys. Res. Solid Earth, 118, 897–914, doi:10.1002/jgrb.50108
  12. Liu, Z., D. Dong, P. Lundgren, 2011, Constraints on time-dependent volcanic source models at Long Valley Caldera from 1996 to 2009 using InSAR and geodetic measurements, Geophys. J. Int., doi: 10.1111/j.1365-246X.2011.05214.x.
  13. Liu, Z., S. Owen, D. Dong, P. Lundgren, F. Webb, E. Hetland, and M. Simons, 2010, Integration of transient strain events with models of plate coupling and areas of great earthquakes in southwest Japan, 181, 1292-1312, Geophys. J. Int., doi:10.1111/j.1365-246X.2010.04599.x.
  14. Liu, Z., S. Owen, D. Dong, P. Lundgren, F. Webb, E. Hetland, and M. Simons, 2010, Estimation of interplate coupling in the Nankai trough, Japan using GPS data from 1996 to 2006, Geophys. J. Int., 181, 1313-1328, doi: 10.1111/j.1365-246X.2010.04600.x.
  15. Lundgren, P., E. Hetland, Z. Liu, and E. J. Fielding, 2009, Southern San Andreas-San Jacinto fault system slip rates estimated from earthquake cycle models constrained by GPS and interferometric synthetic aperture radar observations, J. Geophys. Res., 114, B02403, doi:10.1029/2008JB005996.
  16. Bird, P., Z. Liu, and W. K. Rucker, 2008, Stresses that drive the plates from below: Definitions, computational path, model optimization, and error analysis, J. Geophys. Res., 113, B11406, doi:10.1029/2007JB005460.
  17. Liu, Z. , and P. Bird, 2008, Kinematic modeling of the neotectonics of the Persia-Tibet-Burma Orogen, Geophys. J. Int., 172(2), 779-797, doi: 10.1111/j.1365-246X.2007.03640.x.
  18. Bird, P., and Z. Liu, 2007, Seismic hazard inferred from tectonics: California, Seismological Research Letter, 78(1), 37-48.
  19. N.E. King, D. Argus, J. Langbein, D.C. Agnew, G. Bawden, R.S. Dollar, Z. Liu, D. Galloway, E. Reichard, A. Yong, F.H. Webb, Y. Bock, K. Stark, and D. Barseghian, 2007, Space geodetic observation of expansion of the San Gabriel Valley, California, aquifer system, during heavy rainfall in winter 2004-2005, Journal of Geophysical Research, 112, B03409, doi:10.1029/2006JB004448, 2007.
  20. Liu, Z. , and P. Bird, 2006, 2-D and 3-D finite element modeling of mantle processes beneath the central South Island, New Zealand, Geophysical Journal of International, 165, 1003-1028 doi: 10.1111/j.1365-246X.2006.02930.x.
  21. Kagan, Y. Y., D. D. Jackson, and Z. Liu, 2005, Stress and earthquakes in southern California, 1850-2004, Journal of Geophysical Research, 110(5), B05S14, doi:10.1029/2004JB003313.
  22. A. Jin, Kei Aki, Z. Liu, V. Keilis-Borok, 2004, Seismological evidence for the brittle-ductile interaction hypothesis on earthquake loading, Earth, Planets and Space, 56, 823-830.
  23. Zaliapin, I., A. Jin, Z. Liu, K. Aki, and V.Keilis-Borok, 2004, Temporal (un)correlations between coda Q and seismicity - multiscale trend analysis, Pure and Applied Geophysics, 162, 827-841.
  24. Liu, Z. , and P. Bird, 2002b, North America plate is driven westward by lower mantle flow, Geophysical Research Letters, 29(24), 2164, doi: 10.1029/2002GL016002.
  25. Liu, Z. , and P. Bird, 2002a, Finite element modeling of neotectonics in New Zealand, Journal of Geophysical Research, 107(B12), 2328, doi:10.1029/2001JB001075.
  26. Zaliapin, I., Z. Liu, G. Zöller, V. Keilis-Borok, and D. Turcotte, 2002, On increase of earthquake correlation length prior to large earthquakes in California, Computational Seismology and Geodynamics, 33, 141-161.
  27. Gao, Y., Z. L. Wu, Z. Liu, H. L. Zhou, 2000, Seismic source characteristics of nine strong earthquakes from 1988 to 1990 and earthquake activity since 1970 in the Sichuan-Qinghai-Xizang (Tibet) zone of China, Pure and Applied Geophysics, 157, 1423-1443.
  28. Bird, P., and Z. Liu, 1999, Global finite-element model makes a small contribution to intraplate seismic hazard estimation, Bulletin of Seismological Society of America, 89, 6, 1642-1647.

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