Journal of Geophysical Research : Solid Earth Testing the inference of creep on the northern Rodgers Creek fault , California , using ascending and descending persistent scatterer InSAR data

Author(s): Jin, L; Funning, GJ | Abstract: ©2017. American Geophysical Union. All Rights Reserved. We revisit the question of whether the Rodgers Creek fault in northern California is creeping, a question with implications for seismic hazard. Using imagery acquired by Envisat between 2003 and 2010, we process two persistent scatterer interferometric synthetic aperture radar (InSAR) data sets, one from an ascending track and the other from a descending track, covering the northernmost segment of the Rodgers Creek fault between the cities of Santa Rosa and Healdsburg. The two different viewing geometries provided by the two different tracks allow us to distinguish vertical velocities, which may reflect nontectonic deformation processes, from fault-parallel velocities, which can be used to identify creep. By measuring offsets in InSAR line-of-sight velocity from 12 fault-perpendicular profiles through both data sets, we identify seven locations where we have a high degree of confidence that creep is occurring (estimated creep rate is more than two standard deviations above zero). The preferred creep rates at these locations are in the range 1.9–6.7 mm/yr, consistent within uncertainty with alignment array measurements. Creep is probable (P≥0.70) at another three locations, defining a creeping zone ∼20 km long in total, extending northwest from Santa Rosa. We also estimate the map patterns of fault-parallel and vertical velocities in the region covered by both data sets; these suggest that the Rodgers Creek fault immediately southeast of Santa Rosa remains locked.

[1]  Walter H. F. Smith,et al.  New, improved version of generic mapping tools released , 1998 .

[2]  James Jackson,et al.  Surface displacements and source parameters of the 2003 Bam (Iran) earthquake from Envisat advanced synthetic aperture radar imagery , 2005 .

[3]  H. Zebker,et al.  Persistent scatterer interferometric synthetic aperture radar for crustal deformation analysis, with application to Volcán Alcedo, Galápagos , 2007 .

[4]  R. Bürgmann,et al.  Surface creep along the Longitudinal Valley fault, Taiwan from InSAR measurements , 2006 .

[5]  Marie-Pierre Doin,et al.  Spatio-temporal evolution of aseismic slip along the Haiyuan fault, China: Implications for fault frictional properties , 2013 .

[6]  A. Ruina.  Slip instability and state variable friction laws , 1983 .

[7]  H. Zebker,et al.  A new method for measuring deformation on volcanoes and other natural terrains using InSAR persistent scatterers , 2004 .

[8]  D. Lockner,et al.  Chemical controls on fault behavior: Weakening of serpentinite sheared against quartz‐bearing rocks and its significance for fault creep in the San Andreas system , 2013 .

[9]  Semih Ergintav,et al.  Creeping along the Ismetpasa section of the North Anatolian fault (Western Turkey): Rate and extent from InSAR , 2005 .

[10]  C. Kyriakopoulos,et al.  Structural asperity focusing locking and earthquake slip along the Nicoya megathrust, Costa Rica , 2016 .

[11]  E. Fielding,et al.  Coseismic and Postseismic Slip of the 2004 Parkfield Earthquake from GPS and InSAR data , 2005 .

[12]  L. Cluff,et al.  Hayward fault slippage in the Irvington-Niles districts of Fremont, California , 1966 .

[13]  C. Whitten,et al.  Creep on the San Andreas fault , 1960 .

[14]  B. E. Shaw,et al.  Uniform California Earthquake Rupture Forecast, Version 3 (UCERF3)—The Time‐Independent Model , 2014 .

[15]  V. E. Levin,et al.  Interseismic coupling and asperity distribution along the Kamchatka subduction zone , 2005 .

[16]  R. Bilham,et al.  California Creepmeters , 2004 .

[17]  R. Simpson,et al.  Creep Response of the Hayward Fault to Stress Changes Caused by the Loma Prieta Earthquake , 1997 .

[18]  A. Hooper,et al.  Recent advances in SAR interferometry time series analysis for measuring crustal deformation , 2012 .

[19]  S. Hartzell,et al.  Basin Structure beneath the Santa Rosa Plain, Northern California: Implications for Damage Caused by the 1969 Santa Rosa and 1906 San Francisco Earthquakes , 2007 .

[20]  N. N. Ambraseys,et al.  Some characteristic features of the Anatolian fault zone , 1970 .

[21]  A. Ferretti,et al.  InSAR permanent scatterer analysis reveals ups and downs in San Francisco Bay Area , 2004 .

[22]  E. Brabb,et al.  Geologic map of the San Francisco Bay region , 2006 .

[23]  Stephen B. DeLong,et al.  Afterslip Behavior following the 2014 M 6.0 South Napa Earthquake with Implications for Afterslip Forecasting on Other Seismogenic Faults , 2016 .

[24]  James J. Lienkaemper,et al.  Data from theodolite measurements of creep rates on San Francisco Bay region faults, California: 1979-2007 , 2007 .

[25]  James J. Lienkaemper,et al.  Digital Database of Recently Active Traces of the Hayward Fault, California , 2006 .

[26]  N. Sleep,et al.  Creep, compaction and the weak rheology of major faults , 1992, Nature.

[27]  Pietro Milillo,et al.  An aseismic slip transient on the North Anatolian Fault , 2016 .

[28]  Laura M. Wallace,et al.  Subduction zone coupling and tectonic block rotations in the North Island, New Zealand , 2004 .

[29]  Michael J. Rymer,et al.  Talc-bearing serpentinite and the creeping section of the San Andreas fault , 2007, Nature.

[30]  C. W. Roberts,et al.  Preliminary isostatic gravity map of the Sonoma volcanic field and vicinity, Sonoma and Napa Counties, California , 2006 .

[31]  F. Amelung,et al.  InSAR observations of strain accumulation and fault creep along the Chaman Fault system, Pakistan and Afghanistan , 2016 .

[32]  T. J. Powers,et al.  The Most Recent Large Earthquake on the Rodgers Creek Fault, San Francisco Bay Area , 2005 .

[33]  Yngvar Larsen,et al.  Spatial variations in fault friction related to lithology from rupture and afterslip of the 2014 South Napa, California, earthquake , 2016 .

[34]  Howard A. Zebker,et al.  ScanSAR-to-Stripmap Mode Interferometry Processing Using ENVISAT/ASAR Data , 2007, IEEE Transactions on Geoscience and Remote Sensing.

[35]  S. Hickman,et al.  Low strength of deep San Andreas fault gouge from SAFOD core , 2011, Nature.

[36]  C. Thurber,et al.  Geophysical images of the creeping segment of the San Andreas fault: implications for the role of crustal fluids in the earthquake process , 2004 .

[37]  M. Lisowski,et al.  Historic creep rate and potential for seismic slip along the Hayward Fault, California , 1991 .

[38]  T. Farr,et al.  Shuttle radar topography mission produces a wealth of data , 2000 .

[39]  C. R. Allen,et al.  Fault slip in southern California , 1985 .

[40]  Fabrizio Novali,et al.  Creep on the Rodgers Creek fault, northern San Francisco Bay area from a 10 year PS‐InSAR dataset , 2007 .

[41]  Fabio Rocca,et al.  Permanent scatterers in SAR interferometry , 1999, Remote Sensing.

[42]  J. Dieterich.  Time-dependent friction and the mechanics of stick-slip , 1978 .

[43]  D. P. Schwartz,et al.  Slip rate, earthquake recurrence, and seismogenic potential of the Rodgers Creek fault zone, northern California: Initial results , 1991 .

[44]  Jean Taboury,et al.  Measuring ground displacements from SAR amplitude images: Application to the Landers Earthquake , 1999 .

[45]  R. V. Morris,et al.  Acid sulfate alteration of fluorapatite, basaltic glass and olivine by hydrothermal vapors and fluids: Implications for fumarolic activity and secondary phosphate phases in sulfate‐rich Paso Robles soil at Gusev Crater, Mars , 2013 .

[46]  Yngvar Larsen,et al.  Rupture and afterslip of the 2014 South Napa earthquake reveal spatial variations in fault friction related to lithology , 2016 .

[47]  H. Zebker,et al.  Fault Slip Distribution of the 1999 Mw 7.1 Hector Mine, California, Earthquake, Estimated from Satellite Radar and GPS Measurements , 2002 .

[48]  Eric J. Fielding,et al.  Coseismic and Postseismic Slip of the 2004 Parkfield Earthquake from Space-Geodetic Data , 2006 .

[49]  Deformation across the Pacific-North America plate boundary near San Francisco, California , 2001 .

[50]  Marie-Pierre Doin,et al.  Shallow creep on the Haiyuan Fault (Gansu, China) revealed by SAR Interferometry , 2012 .

[51]  Peltzer,et al.  Evidence of Nonlinear Elasticity of the Crust from the Mw7.6 Manyi (Tibet) Earthquake. , 1999, Science.

[52]  M. A. D'Alessio,et al.  Slicing up the San Francisco Bay Area : Block kinematics and fault slip rates from GPS-derived surface velocities , 2005 .

[53]  Z. Çakır,et al.  Surface creep on the North Anatolian Fault at Ismetpasa, Turkey, 1944–2016 , 2016 .

[54]  D. Wells,et al.  New empirical relationships among magnitude, rupture length, rupture width, rupture area, and surface displacement , 1994, Bulletin of the Seismological Society of America.

[55]  Robert A. Williams,et al.  Detailed Mapping and Rupture Implications of the 1 km Releasing Bend in the Rodgers Creek Fault at Santa Rosa, Northern California , 2016 .

[56]  J. Lienkaemper,et al.  Inferences Drawn from Two Decades of Alinement Array Measurements of Creep on Faults in the San Francisco Bay Region , 2003 .

[57]  Gianfranco Fornaro,et al.  A new algorithm for surface deformation monitoring based on small baseline differential SAR interferograms , 2002, IEEE Trans. Geosci. Remote. Sens..

[58]  J. Langbein,et al.  Slip on the San Andreas Fault at Parkfield, California, over Two Earthquake Cycles, and the Implications for Seismic Hazard , 2006 .

[59]  J. Murray,et al.  Dynamic rupture models of earthquakes on the Bartlett Springs Fault, Northern California , 2014 .