Georgios P. Tsoflias

For an electronic copy of a publication send an email request to tsoflias@ku.edu indicating the title or listing number of the article.

Publications

I) Major peer reviewed publications (* indicates student advisees)

1. Zeng C.*, Xia J., Miller R. D. and G. P. Tsoflias, Feasibility of Waveform Inversion of Rayleigh Waves for Shallow Shear-Wave Velocity Using Genetic Algorithm, Journal of Applied Geophysics (accepted for publication).

2. McGlashan M. A.*, Tsoflias G. P., Devlin J. F., P. C. Schillig* and J. A. Roberts, Field GPR Monitoring of Biostimulation in Saturated Porous Media, Special Issue on Techniques of Near-Surface Seismic and Ground-Penetrating Radar Imaging, Journal of Applied Geophysics, 10.1016/j.jappgeo.2011.08.006 (in press).

3. Zeng C.*, Xia J., Miller R. D. and G. P. Tsoflias, An Improved Vacuum Formulation for Finite-Difference Modeling of Rayleigh Waves Including Surface Topography and Internal Discontinuity, Geophysics (in press).

4. Devlin J. F, Schillig P. C., Bowen I., Critchley C. E., Rudolph D. L., Thomson N. R., Tsoflias G. P. and J. R. Roberts, Applications and Implications of Direct Groundwater Velocity Measurement at the Centimeter Scale, Journal of Contaminant Hydrology, CONHYD-02720, doi:10.1016/j.jconhyd.2011.06.007 (in press).

5. Zeng C.*, Xia J., Miller R. D. and G. P. Tsoflias (2011), Application of the Multiaxial Perfectly Matched Layer to Near-Surface Seismic Modeling with Rayleigh Waves, Geophysics, Vol. 76, No. 3, p. T43-T52, doi:10.1190/1. 3560019.

6. Schillig P. C.*, Devlin J. F., Roberts J. A., Tsoflias G. P. and M. A. McGlashan* (2011), Transient Heterogeneity in an Aquifer Undergoing Bioremediation of Hydrocarbons, Ground Water, Vol. 49, No 2, p. 184-196 doi: 10.1111/j.1745-6584.2010.00682.x.

7. Becker M. and G. P. Tsoflias (2010), Comparing Flux-Averaged and Resident Concentration in a Fractured Bedrock Using GPR, Water Resour. Res., 46, W09518, doi:10.1029/2009WR008260.

8. Schillig P. C.*, Tsoflias G. P., Roberts J. A., E.M. Patterson and J. F. Devlin (2010), Ground Penetrating Radar Observations of Enhanced Biological Activity in a Sandbox Reactor, J. Geophys. Res. - Biogeosciences, Special Issue on Biogeophysics, 115, G00G10, doi:10.1029/2009JG001151.

9. Sloan S. D., Tsoflias G. P. and D. W. Steeples (2010), Ultra-Shallow Seismic Imaging of the Top of the Saturated Zone, Geophys. Res. Lett., 37, L07405, doi:10.1029/2010GL043034.

10. Sloan S. D.*, Steeples D. W. and G. P. Tsoflias (2009), Ultra-Shallow Imaging Using 3D Seismic Reflection Methods, Near Surface Geophysics, Special Issue on Hydrogeophysics Methods and Processes, Vol. 7, No. 5, p. 307-314.

11. Devlin J. F., Tsoflias G., McGlashan M.* and P. Schillig* (2009), An Inexpensive Multilevel Array of Sensors for Direct Ground Water Velocity Measurement, Ground Water Monitoring and Remediation Vol. 29, No. 2, p. 73-77, doi:10.1111/j.1745-6592.2009.01233.x.

12. Christie M.*, Tsoflias G. P., Stockli D. and R. A. Black (2009), Assessing Off-Fault Deformation at an Extensional Tectonic Setting Using 3-D GPR Imaging, Journal of Applied Geophysics, Special Issue on Techniques of Near-Surface Seismic and Ground-Penetrating Radar Imaging, Vol. 68, No. 1, p. 9-16, doi:10.1016/j.jappgeo.2008.10.013.

13. Vincent P. D.*, Tsoflias G. P., Steeples D. W. and R. A. Black (2009), Evaluating the Effect of the Joining Platform to Seismic Data Acquired by Geophones Mounted to Rigid Media, Journal of Applied Geophysics, Vol. 68, No. 2, p. 146-150, doi:10.1016/j.jappgeo.2008.10.010.

14. Tsoflias G. P.** (2008), GPR Imaging of Dual-Porosity Rocks: Insights to Fluid Flow, The Leading Edge, November 2008 Special Issue on Near-Surface Geophysics, Vol. 27, No. 11, p. 1436-1445.

15. Tsoflias G. P. and M. Becker (2008), Ground Penetrating Radar Response to Fracture Fluid Salinity: Why Lower Frequencies are Favorable for Resolving Salinity Changes, Geophysics, Vol. 73, No. 5, p. J25-J30, doi:10.1190/1.2957893.

16. Eslick R.*, Tsoflias G. P. and D. W. Steeples (2008), Field Investigation of Love Waves in Near-Surface Seismology, Geophysics, Vol. 73, No. 3, p. G1-G6, doi:10.1190/1.2901215.

17. Horgan H. J., Anandakrishnan S., Alley R. B., Peters L. E., Tsoflias G. P., Voigt D. E., and J. P Winberry (2008), Complex Fabric Development Revealed by Englacial Seismic Reflectivity: Jakobshavn Isbræ, Greenland, Geophys. Res. Lett., 35, L10501, doi:10.1029/2008GL033712.

18. Sloan S. D.*, Tsoflias G. P. and D. W. Steeples (2007), Shallow Seismic AVO Variations Related to Partial Water Saturation During a Pumping Test, Geophys. Res. Lett., 34, L22405, doi:10.1029/2007GL031556.

19. Sloan S. D.*, Tsoflias G. P., Steeples D. W. and P. D. Vincent* (2007), High-Resolution Ultra-Shallow Subsurface Imaging by Integrating Near-Surface Seismic Reflection and Ground-Penetrating Radar Data in the Depth Domain, Journal of Applied Geophysics, Vol. 62, No. 3, p. 281-286 doi:10.1016/j.jappgeo.2007.01.001.

20. Tsoflias G. P. and A. Hoch* (2006), Investigating Multi-Polarization GPR Wave Transmission Through Thin Layers: Implications for Vertical Fracture Characterization, Geophys. Res. Lett., 33, L20401, doi:10.1029/2006GL027788.

21. Tsoflias G. P., Steeples D. W., Czarnecki G.*, Sloan S. D.* and R. C. Eslick* (2006), Automatic Deployment of a 2-D Geophone Array for Efficient Ultra-Shallow Seismic Imaging, Geophys. Res. Lett., 33, L09301, doi:10.1029/2006GL025902.

22. Vincent P. D.*, Tsoflias G. P., Steeples D. W. and S. D. Sloan* (2006), Fixed-Source and Fixed-Receiver Walkaway Seismic Noise Tests: A field Comparison, Geophysics, Vol. 71, No. 6, p. W41-W44.

23. Tsoflias G. P., Van Gestel J. P., Stoffa P., Blankenship D. and M. Sen, (2004) Vertical Fracture Detection by Exploiting the Polarization Properties of GPR Signal, Geophysics, Vol. 69, No. 3, p. 803-810.

24. Tsoflias G. P., Halihan T. and J. M. Sharp, Jr. (2001), Monitoring Pumping Test Response in a Fractured Aquifer Using Ground Penetrating Radar, Water Resour. Res., Vol. 37, No. 5, p.1221-1229.

25. Wilson C. R., Tsoflias G. P., Bartelmann M. and J. Phillips (1997), A High Precision Aeromagnetic Survey Near the Glen Hummel Field in Texas; Identification of Cultural and Sedimentary Anomaly Sources, The Leading Edge, Vol. 16, No. 1, p. 37-42.

26. Tsoflias G. P., Bollinger G. A. and J. K. Costain (1995), Common Cyclicities in the Seismicity and Water Level Fluctuations at the Charlevoix Seismic Zone of the St. Lawrence River, Quebec, Canada, Journal of Geodynamics, Vol. 19, No. 2, p. 117-139, doi:10.1016/0264-3707(94)00008-J.

27. Tsoflias G. P. (1991), A Note on the Goochland County, Virginia, Earthquake of March 15, 1991, Seismological Research Letters, Vol. 62, No. 3-4, p. 225-231.

II) Minor publications and refereed conference transactions

28. Tsoflias G. P.** and D. W. Steeples (2011), High Resolution Characterization of the Near Surface: GPR and Seismic Reflection Methods, 73^rd EAGE Conference Workshop, Vienna, Austria, May 22-26, 2011 (3 pages).

29. Hoch. A. M.*, Velez, J. A.*, Tsoflias G. P., Stearns L. A. and C. J. van der Veen (2011), Multi-Channel Coherent Radar Depth Sounding of Jakobshavn Isbræ and its Catchment, 2011 IEEE Radar Conference, Kansas City, Missouri, May 23-27, 2011, p 1135-1137.

30. Tsoflias G. P. (2010), Use of Surface and Borehole Ground Penetrating Radar in Geologic and Engineering Investigations of Transportation Projects, Kansas Dept. of Transportation Report No. K-TRAN: KU-06-8, pages 87.

31. Tsoflias G. P. and R. Henthorne (2010), Borehole GPR Detection of Subsurface Voids at Kansas Highway 69 Pittsburg Bypass, Symposium on Kansas Geophysics in the 21^st Century, Wichita, Kansas USA, October 27-29, 2010 (4 pages).

32. Miller B.*, Tsoflias G. P. and D. Steeples (2010), New Innovations in Near-Surface 3-D Acquisition, Symposium on Kansas Geophysics in the 21^st Century, Wichita, Kansas USA, October 27-29, 2010 (4 pages).

33. Knoph K.*, Tsoflias G, Franseen E and R. Goldstein (2010), Ground-Penetrating Radar Imaging of Facies Distribution in a Carbonate Reservoir Analog, Symposium on Kansas Geophysics in the 21^st Century, Wichita, Kansas USA, October 27-29, 2010 (4 pages).

34. Miller B.*, Tsoflias G. P. and D. Steeples (2010), 3-D Design for a Near-Surface Seismic Reflection Investigation, Society of Exploration Geophysicists 80^th Annual Meeting Transactions p. 1993-1998.

35. Sloan S. D., Tsoflias G. P., Steeples D. W. and J. R. McKenna (2010), Ultra Shallow Seismic Imaging of the Top of the Saturated Zone, Society of Exploration Geophysicists 80^th Annual Meeting Transactions p. 1960-1964.

36. Godio A., Tsoflias G. P., Piatti C., Rege R. and V. Socco (2010), Joint Use of Seismic Surface Waves and Multioffset GPR for Sandy Soil Characterization, Society of Exploration Geophysicists 80^th Annual Meeting Transactions p. 1887-1891.

37. Zahm C. and G. Tsoflias (2010), Interwell Calculation of Permeability in Vuggy Pores Using Ground-Penetrating Radar and Cross-Hole Tomography within Albian Carbonates Reservoir Analogs, Pipe Creek, Texas, Gulf Coast Association of Geological Societies Transactions v. 60, p. 853.

38. Miller B.*, Tsoflias G. P. and D. Steeples (2010), Advancements in Near-Surface Seismic Reflection Acquisition, PhD Students and Young Scientists Conference, Warsaw, Poland, September 13-16, 2010 (5 pages).

39. Cheng K.*, Leuschen C. and G. Tsoflias (2010), Investigation of Radar Subsurface Sounding Through Seasonal Cycles Collected by Mars Shallow Radar (SHARAD) in the South Polar Area, IEEE 30^th International Geoscience and Remote Sensing Symposium (IGARSS), Honolulu, Hawaii, USA, July 25-30, 2010 (4 pages).

40. Devlin J. F, Schillig P. C., Bowen I., Rudolph D. L., Thomson N. R., Tsoflias G. P. and J. R. Roberts (2010), Applications and Implications of Direct Groundwater Velocity Measurement at the Centimeter Scale, GQ10: Groundwater Quality Management in a Rapidly Changing World, Proc. 7^th International Groundwater Quality Conference, Zurich, Switzerland, June 13-18, 2010, p. 50-53.

41. Miller B.*, Tsoflias G. P. and D. W. Steeples (2009), Automated Geophone Deployment on Pavement for High Resolution Seismic Reflection Investigations in Support of Transportation Infrastructure Projects, Society of Exploration Geophysicists 79^th Annual Meeting Transactions, p. 1430-1434.

42. Zeng C.*, Xia J., Miller R. D. and G. P. Tsoflias (2009), Modeling Results on Detectability of Shallow Tunnels Using Rayleigh Wave Diffraction, Society of Exploration Geophysicists 79^th Annual Meeting Transactions, p. 1425-1429.

43. Sloan S. D., Steeples D. W. and G. P. Tsoflias (2009), Automating the Acquisition of 3D Near-Surface Seismic Reflection Data, Society of Exploration Geophysicists 79^th Annual Meeting Transactions, p. 1315-1319.

44. Ivanov J., Tsoflias G. P., Miller R. M, and J. Xia (2009), Practical Aspects of MASW Inversion Using Varying Density, 22^nd Symposium on the Application of Geophysics to Engineering and Environmental Problems Transactions, p. 171-177.

45. Tsoflias G. P., Ivanov J., Anandakrishnan S. and R. M. Miller (2008), Use of Active Source Seismic Surface Waves in Glaciology, 21^st Symposium on the Application of Geophysics to Engineering and Environmental Problems Transactions, p. 1240-1243.

46. Ivanov J., Miller R. M., and G. P. Tsoflias (2008), Some Practical Aspects of MASW Analysis and Processing, 21^st Symposium on the Application of Geophysics to Engineering and Environmental Problems Transactions, p. 1186-1198.

47. Sloan S. D.*, Steeples D. W., and G. P. Tsoflias (2008), Imaging a Shallow Paleo-Channel Using 3D Ultra-Shallow Seismic Reflection Methods, 21^st Symposium on the Application of Geophysics to Engineering and Environmental Problems Transactions, p. 568-576.

48. Tsoflias G. P. and Becker M. W. (2007), Multi-frequency Investigation of GPR Amplitude and Phase Response to Fracture Fluid Salinity, Society of Exploration Geophysicists 77^th Annual Meeting Transactions, p. 1157-1160.

49. Eslick R.*, Tsoflias G. P. and Steeples D. W. (2007), Field investigation of Love waves in near-surface seismology, Society of Exploration Geophysicists 77^th Annual Meeting Transactions, p. 1217-1221.

50. Sloan S. D.*, Tsoflias G. P. and Steeples D. W. (2007), Seismic AVO variations related to partial water saturation during a pumping test, Society of Exploration Geophysicists 77^th Annual Meeting Transactions, p. 1212-1216.

51. McGlashan M. A.*, Tsoflias, G. P.†, Schillig, P. C.* and J. F. Devlin (2006), Estimating Groundwater Flow Velocity Using Borehole GPR and Point Velocity Probes, Proceedings of the Eleventh International Conference on Ground Penetrating Radar, June 19-22, 2006, Columbus Ohio. HYD.3, p. 1-5.

52. Czarnecki G. P.*, Tsoflias G. P., Steeples D. W., Sloan S. D.* and R. C. Eslick* (2006), An Example of Automated 3D Ultra-Shallow Seismic Acquisition, Society of Exploration Geophysicists 76^th Annual Meeting Transactions, p. 1461-1465.

53. Sloan S. D.*, Tsoflias G. P. and Steeples D. W., (2006), Frequency Effects of the Partially Water-Saturated Zone Thickness on Shallow Seismic Reflection Data, Society of Exploration Geophysicists 76^th Annual Meeting Transactions, p. 1362-1366.

54. Tsoflias G. P. and A. Hoch* (2005), Relating GPR Signal Response to Simulated Vertical Fracture Properties, Society of Exploration Geophysicists 75^th Annual Meeting Transactions, p. 1168-1171.

55. Tsoflias G. P., Steeples D, and R. Black (2005), Hydrogeophysics research at the University of Kansas: EEGS Publication, Fast Times, Vol. 10, No. 1, p. 27.

56. Miller R. D., Xia J., Steeples D., Black R., and G. P. Tsoflias (2005), Applied research in high-resolution seismic reflection at KU: EEGS Publication, Fast Times, Vol. 10, No. 1, p. 26-27.

57. Healey J. M., Tsoflias G. P., Steeples D. W., Vincent P.*, Sloan S. D.*, and C. D. McElwee (2005), Geophysical Techniques Applied to a Stream-Aquifer System, Kansas Geological Survey Open-File Report, No. 2005-11.

58. Sloan S. D.*, Vincent P. D.*, Tsoflias G. P. and D. W. Steeples (2005), Combining Near-Surface Seismic Reflection and Ground-Penetrating Radar in the Depth Domain, Society of Exploration Geophysicists 75^th Annual Meeting Transactions, p. 1208-1211.

59. Vincent P. D.*, Steeples D. W., Tsoflias G. P. and S. D. Sloan* (2005), Two Approaches to Noise Tests, Society of Exploration Geophysicists 75th Annual Meeting Transactions, p. 1180-1183.

60. Rademacker T., Miller R., Xia J., Black R. and G. Tsoflias (2005), Enhancing the Vibroseis Technique Through Equipment Noise Reduction and Optimizing the Weighted Sum Signal, Society of Exploration Geophysicists 75^th Annual Meeting Transactions, p. 33-36.

61. Tsoflias G. P., Halihan T. and M. A. Muldoon (2004), Fracture Fluid Flow Properties Investigation Using GPR and Hydraulic Testing Methods, Proceedings of the Tenth International Conference on Ground Penetrating Radar, June 21-24, 2004, Delft, The Netherlands, E. Slob et al. (eds), Vol. II, p. 521-524.

62. Vincent P. D.*, Blair J. D., Steeples D. W., and G. P. Tsoflias (2004), Effect of Orientation of Hollow-Bar-Mounted Geophones on Airwave Coherency, Society of Exploration Geophysicists 74^th Annual Meeting Transactions, p. 1345-1348.

63. Tsoflias G.P. (2003), Investigating Fluid Flow Properties of Fractured Formations Using Ground-Penetrating Radar, Society of Exploration Geophysicists 73^rd Annual Meeting Transactions, p. 1166-1169.

64. Sharp J. M., Jr., Halihan T., Uliana M. M, Tsoflias G. P., Landrum M. T. and R. Marrett (2000), Predicting Fractured Rock Hydrogeological Parameters from Field and Laboratory Data, Proceedings of the XXX IAH Congress on Groundwater: Past Achievements and Future Challenges, Cape Town, South Africa, Nov 26-Dec 1, 2000 , O. Sililo et al. (eds), A.A. Balkema, Rotterdam, p. 319-324.

65. Tsoflias G. P., Van Gestel J. P., Stoffa P. and M. Sen, (1999) Detection of Vertical Fractures in Geologic Formations Using the Polarization Properties of Ground-Penetrating Radar Signal, Society of Exploration Geophysicists 69^th Annual Meeting Transactions, p. 566-570.

66. Tsoflias G. P. and J. M. Sharp, Jr. (1998), Three-Dimensional Hydrogeologic Characterization of Fractured Carbonate Aquifers Using Ground-Penetrating Radar, Gulf Coast Association of Geological Societies Transactions, v XL VIII 1998, p. 439-447.

III) Conference abstracts

67. Tsoflias G. P., Baker M.* and M. W. Becker (2011), Assessing GPR Signal Polarization for 3D Imaging of Fracture Flow Channels, Abstract NS------, Fall AGU Meeting, San Francisco, Calif., 5-9 Dec (submitted).

68. Hoch A. M.*, Velez J. A.*, Tsoflias G. P., Stearns L. A. and C. J. Van der Veen (2011), Improved Characterization of the Jakobshavn Isbræ Catchment Region through Analysis of Radar Depth Sounder Data, Abstract C------, Fall AGU Meeting, San Francisco, Calif., 5-9 Dec (submitted).

69. Arntsen A. E.*, Godaire T. P.*, Tsoflias G. P., Stearns L. A., Van der Veen C. J. and A. M. Hoch* (2011), Internal Ice layer Mapping and Geophysical Analysis of Jakobshavn Glacier, Greenland, Abstract C------, Fall AGU Meeting, San Francisco, Calif., 5-9 Dec (submitted).

70. Tsoflias G. P., Becker M. W. and M. Baker* (2011), Monitoring of Flow in Fractured Rock Using Ground Penetrating Radar, National Ground Water Association Focus Conference on Fractured Rock and Eastern Groundwater Regional Issues, Burlington, Vermont, September 26-27, 2011.

71. Tsoflias G. P. and M. W. Becker (2011), GPR Imaging of Channeled Flow in Fractured Bedrock, DOE Subsurface Biogeochemical Research 6^th Annual PI Meeting, Washington D.C., April 26-28, 2011.

72. Godio A., Franco D., Basiricò S., Crosta G. B., Frattini P., Villa A. and G. Tsoflias (2011) Hydrogeophysical Characterization of a Complex Aquifer in Calcareous and Gypsum Formations, Geophysical Research Abstracts Vol. 13, EGU2011-10358-1, 2011, EGU General Assembly 2011.

73. Zeng C.*, Xia J., Miller R. D. and G. P. Tsoflias (2011), Application of the Multiaxial Perfectly Matched Layer to Near-Surface Seismic Modeling with Rayleigh waves, 24^th Symposium on the Application of Geophysics to Engineering and Environmental Problems (SAGEEP), Charleston, South Carolina, April 10-14, 2011.

74. Godio A.**, Tsoflias G. P., Socco V., Piatti C., Rege R. and A. Arato (2011), Seismic Surface Waves and Multioffset GPR for Sandy Soil Characterization, 24^th Symposium on the Application of Geophysics to Engineering and Environmental Problems (SAGEEP), Charleston, South Carolina, April 10-14, 2011 [invited presentation of the 2010 SEG talk].

75. Knoph K.*, Franseen E., Goldstein R., Tsoflias G. P. and Z. Li (2011), GPR Constraints on 3D Stratigraphic Architecture and Porosity in Microbialite-Oolite Sequences, Upper Miocene, SE Spain, American Association of Petroleum Geologists Annual Convention Transactions, Houston, Texas, April 10-13 ¸ 2011.

76. Tsoflias G. P. (2011), Ground Penetrating Radar High Resolution 3-D Imaging of Dual Porosity - Permeability Systems: Imaging Carbonate Lithofacies, Flow Units and Flow Conduits, 2011 Annual Review Meeting of the Kansas Interdisciplinary Carbonate Consortium, Lawrence, Kansas, March 29-31¸ 2011 (4 pages).

77. Tsoflias G. P. (2011), Imaging Fluid Flow and Transport in Discrete Fractures using Ground Penetrating Radar, 2011 Annual Review Meeting of the Kansas Interdisciplinary Carbonate Consortium, Lawrence, Kansas, March 29-31¸ 2011 (4 pages).

78. Knoph K.*, Tsoflias G. P., Franseen E. and R. Goldstein (2011), Integrating Ground-Penetrating Radar and Field Relationships to Evaluate Porosity and Stratigraphic Models in Upper Miocene Microbial-Oolitic Carbonates, SE Spain, 2011 Annual Review Meeting of the Kansas Interdisciplinary Carbonate Consortium, Lawrence, Kansas, March 29-31¸ 2011 (4 pages).

79. Tsoflias G. P., Schillig P. C.*, McGlashan M. A., Roberts J. A. and J. F. Devlin (2010), Elucidating GPR Response to Biological Activity: Field and Laboratory Experiments, Abstract NS33A-04 presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec.

80. Cherukupally A, Freund F. T; Vanderbilt V. C, Tsoflias G. P. and R. Dahlgren (2010), Stress-Activated Electromagnetic Emission and Reflection from Gabbro and Gabbro-Diorite, Abstract NH31A-1335 presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec.

81. Tsoflias G. P.**, Schillig P. C.*, McGlashan M. A., Roberts J. A. and J. F. Devlin (2010), Field and Laboratory GPR Monitoring of Biological Activity in Saturated Porous Media, Geophysical Research Abstracts Vol. 12, EGU2010-6415-1, 2010, EGU General Assembly 2010.

82. Tsoflias G. P., Ivanov J., Anandakrishnan S., Horgan H. and L. Peters (2010), Lateral Variability in Firn Properties Revealed by Active Source Seismic Surface Waves, Geophysical Research Abstracts Vol. 12, EGU2010-6445, 2010, EGU General Assembly 2010.

83. Dahlgren R., Williams C., Freund F. T., Vanderbilt V. C., Bleier T. and G. Tsoflias (2010), Measurement of Electromagnetic and RADAR Effects During Large-Scale Rock Stress/Fracture Experiments (2010), Workshop on Electromagnetic Signals associated with Earthquakes & Volcanoes, Chapman University, Orange, CA, October 3-6, 2010

84. Velez J. A.*, Tsoflias G. P., and S. Anandakrishnan (2010), Evaluating Ice Basal Conditions at Jakobshavn Glacier Using Seismic AVO Methods, SACNAS National Conference, Anaheim, California, USA, Sept. 30 – Oct. 3, 2010.

85. Devlin J. F., Schillig P.C.*, Bowen I., Tsoflias G. P., Rudolph D. L., Thomson N. R., and E. Patterson (2010) Advances in Tools for Detailed Aquifer Characterization, Hydrocarbon Summit, University of Waterloo, Waterloo, Ontario, Canada, July 20 2010.

86. Becker M. and G. P. Tsoflias (2010), What Does Resident Concentration Mean at the Field Scale?, presented at “Thirty years of stochastic subsurface hydrology: Where do we stand and what are the emerging challenges?” Centro Stefano Franscini Conference, Monte Verità, Ascona, Switzerland, June 27 - July 2, 2010.

87. Becker M. and G. P. Tsoflias (2010), Hydrogeophysical Characterization and Monitoring of Fractured Bedrock (2010), Groundwater Resources Association of California Symposium on Geophysics at the Beach, Santa Anna, California, May 25, 2010.

88. Tsoflias G. P.** (2010), GPR Imaging of Flow in Discrete Fractures: Implications to Geothermal Resources Development, Symposium on Geothermal Energy for Sustainable Development: The Necessity of a Multidisciplinary Approach, Turin, Italy, February 9, 2010.

89. Becker M. and G. P. Tsoflias (2010), Measuring Channeled Flow in Fractured Bedrock: Application of Harmonic Hydraulic Interference Testing, DOE ERSP 5^th Annual PI Meeting, Washington D.C., March 29-31, 2010.

90. Velez J. A.*, Tsoflias G. P. and S. Anandakrishnan (2009), Using Seismic Anisotropy to Detect Mean Ice Crystal Orientation in the Jakobshavn Glacier, Fall AGU Meeting EOS Trans. AGU, 90(52), Fall Meet. Suppl., Abstract C23C-0517.

91. Hoch A.*, Velez J. A.*, Nardone A.*, Stearns L. and G. P. Tsoflias (2009), Three-dimensional Visualization of the Jakobshavn Isbrae Catchment Region, Fall AGU Meeting EOS Trans. AGU, 90(52), Fall Meet. Suppl., Abstract C31C-0458.

92. Williams C., Tsoflias G., Cyr G., Dahlgren R. and F. Freund (2009), Radar Reflectivity Changes of Rock Surfaces due to Heat-Activated Charge Carriers: Contributing to the Understanding of the Magellan Venus Radar Reflectivity Data, EOS Trans. AGU, 90(52), Fall Meet. Suppl., Abstract P33A-1277.

93. Velez J. A.*, Tsoflias G. P., Anandakrishnan S., Horgan H., Peters L., Voigt D. and P. Winberry (2009), Determining Glacier Ice Crystal Orientation Using Seismic Anisotropy, SACNAS National Conference, Dallas, Texas USA, October 15-18, 2009.

94. Freund F., Williams C., Tsoflias G., Dahlgren R., McMillan M. and J. Keefner (2009), Non-Thermal IR Signature Prior to Earthquakes and When Volcanoes Wake Up, HyspIRI (Hyperspectral Infrared Imager) Workshop, Pasadena CA USA, August 11-13, 2009.

95. Zahm C., Tsoflias G., Peterson K.* and X. Janson (2009), Shallow Water Injection Monitoring in Vuggy Pores Using Ground-Penetrating Radar and Cross-Hole Tomography, Pipe Creek, Texas, American Association of Petroleum Geologists Annual Convention Transactions, Denver, Colorado, June 7-10 ¸ 2009.

96. Lipinski C. J., Goldstein R. H., Franseen E. K. and G. P. Tsoflias (2009), Oolite-Microbialite-Coral Reef 3-D Reservoir Analog Model of the Miocene Terminal Carbonate Complex, SE Spain, American Association of Petroleum Geologists Annual Convention Transactions, Denver, Colorado, June 7-10, 2009.

97. Tsoflias G. P., Ivanov J., Anandakrishnan S., Horgan H., Peters L., Voigt D. and P. Winberry (2008), Firn and Shallow Ice Profiling at Jakobshavn Glacier Using Dispersed Seismic Surface Waves, EOS Trans. AGU, 89(53), Fall Meet. Suppl., Abstract C11D-0528.

98. Velez J. A.*, Tsoflias G. P., Anandakrishnan S., Horgan H., Peters L., Voigt D. and P. Winberry (2008), Evidence of Seismic Anisotropy Detected on Jakobshavn Glacier, EOS Trans. AGU, 89(53), Fall Meet. Suppl., Abstract C11D-0540.

99. Peters L., Anandakrishnan S., Horgan H., Winberry P., Voigt D. and G. Tsoflias, (2008), Constraint on Basal Conditions in the Onset Region of Jakobshavn Isbrae, Greenland, through Seismic Amplitude Variation with Offset (AVO) Analysis, EOS Trans. AGU, 89(53), Fall Meet. Suppl., Abstract C11A-0474.

100. Becker M. and G. P. Tsoflias (2008), GPR-Measured Tracer Breakthrough in a Sandstone Bedding-Plane Fracture, EOS Trans. AGU, 89(53), Fall Meet. Suppl., Abstract NS41A-08.

101. Schillig P. C.*, Devlin J. F., Roberts J. A. and G. P. Tsoflias (2008), The Effects of Microbial Activity on the Hydrogeology of a Biostimulated Aquifer, 7th International Symposium for Subsurface Microbiology, Shizuoka, Japan, November 16-21.

102. Schillig P. C.*, Tsoflias G. P., Roberts J. A., Devlin J. F. and E. M. Patterson (2008), Time-lapse GPR Monitoring of Enhanced Biological Activity in a Sandbox Reactor, AGU Chapman Conference on Biogeophysics, Portland, Maine USA, October 13-16.

103. Devlin, J. F., Schillig P.*, Tsoflias G., McGlashan M.* and J. Roberts (2008), A new Tool for Groundwater Velocity Measurement and its Applications. Invited for presentation at the 2008 North American Environmental Field Conference and Exposition: Advances in Environmental Site Characterization Sampling and Monitoring Technology, Tampa, Florida, Jan. 14-16.

104. Tsoflias G. P.**, Stockli D. F., Christie M. W.* and R. A. Black (2007), Assessing Off-Fault Deformation at an Extensional Tectonic Setting Using 3-D GPR, Geophysical Research Abstracts, Vol. 9, 08915, 2007 SRef-ID: 1607-7962/gra/EGU2007-A-08915.

105. Tsoflias G. P.**, Hoch A.*, Gifford C. M.*, Agah A., Ivanov J., Anandakrishnan S., Horgan H., Peters L., Voigt D. and P. Winberry (2007), Advancing Active Source Seismic Methods for Exploration of the Cryosphere, EOS Trans. AGU, 88(52), Fall Meet. Suppl., Abstract NS14A-03.

106. Tsoflias G. P., Becker M. W. and S. R. Bourque (2007), Relating GPR Signal Response to Fracture Fluid Salinity, EOS Trans. AGU, 88(52), Fall Meet. Suppl., Abstract H44A-05.

107. Schillig P. C.*, Devlin J.F., Tsoflias G. P., Patterson E. M., Roberts J. A. and M. A. McGlashan* (2007), Field and Laboratory Investigations of Enhanced Biological Activity Influencing Groundwater Velocity and Electromagnetic Wave Propagation, EOS Trans. AGU, 88(52), Fall Meet. Suppl., Abstract NS11B-0497.

108. Patterson E. M., Schillig P. C.*, Tsoflias G. P., Devlin J.F. and J.A. Roberts (2007), A Laboratory Tank Experiment to Investigate the Effects of Microbial Growth on Water Flow and GPR Wave Propagation, EOS Trans. AGU, 88(52), Fall Meet. Suppl., Abstract NS11B-0496.

109. Black R. A., Christie M. W.*, Tsoflias G. P. and D. F. Stockli (2007), Near-Surface Seismic Reflection and GPR Imaging of the Active Emigrant Peak Fault, Fish Lake Valley, NV, EOS Trans. AGU, 88(52), Fall Meet. Suppl., Abstract NS23A-01.

110. Hoch A.*, Martinez A.* and G. Tsoflias (2007), Three-Dimensional Mapping and Visualization of Airborne Polar Radar Data, EOS Trans. AGU 88(23), Jt. Assem. Suppl., Abstract GC23A-07.

111. Devlin J. F., Schillig P. C.*, McGlashan M. A.*, Tsoflias G. P. and J. A. Roberts (2007), Investigating Transient Heterogeneity in a Bioactive Plume Using GPR and PVPs, EOS Trans. AGU 88(23), Jt. Assem. Suppl., Abstract NS44A-03.

112. Schillig P. C.*, McGlashan M. A.*, Devlin J. F., Tsoflias G. P. and J. A. Roberts (2007), Using Groundwater Point Velocity Probes and Ground Penetrating Radar to Investigate Microbially Mediated Changes in Flow Properties of a Contaminated Aquifer, EOS Trans. AGU 88(23), Jt. Assem. Suppl., Abstract NS51A-02.

113. Devlin J. F., Schillig P. C.*, McGlashan M. A.*, Tsoflias G. P and D. M. Mackay (2007), Transient Heterogeneity Below the Water Table and Effects on Contaminant Plumes, 2007 Ground Water Summit, National Ground Water Association, Albuquerque, New Mexico, April 29-May 3.

114. Schillig P. C.*, Devlin J. F., N. Kinnebrew, McGlashan M. A.* and G. P. Tsoflias (2007), Development and Field Application of a Tool to Directly Measure Centimeter-Scale Groundwater Velocities with Implications for Transient Heterogeneity in Contaminated Aquifers, 2007 Ground Water Summit, National Ground Water Association, Albuquerque, New Mexico, April 29-May 3.

115. Tsoflias G. P., Devlin J. F., Roberts J., McGlashan M. A.*, Schillig P. C.*, Barker J. F., Naas C., Endres A. and S. Piggott (2006), Hydrogeophysical Monitoring of a Homogeneous Aquifer Response to a Modern Gasoline Fuel Contaminant Plume: Preliminary Observations, Society of Exploration Geophysicists 2006 Hydrogeophysics Workshop, 31 July – 2 August, Vancouver, BC Canada.

116. Christie M. W.*, Tsoflias G. P., Black R. A. and D. F. Stockli (2006), Ground Penetrating Radar Imaging of the Emigrant Peak Fault Zone and Alluvial Fan, EOS Trans. AGU, 87(52), Fall Meet. Suppl., Abstract NS41A-1123.

117. Black R. A., Christie M. W.*, Tsoflias G. P. and D. F. Stockli (2006), Shallow Seismic Reflection Study of Recently Active Fault Scarps, Mina Deflection, Western Nevada, EOS Trans. AGU, 87(52), Fall Meet. Suppl., Abstract NS41A-1122.

118. Gifford C.*, Agah A. and G. P. Tsoflias (2006), Hybrid Streamers for Polar Seismic, EOS Trans. AGU, 87(52), Fall Meet. Suppl., Abstract C41B-0335.

119. Jarvis J.* and G. P. Tsoflias (2006), GPR Waves at the Interface: An Investigation of Electromagnetic Wave Polarization Attributes for Fracture Characterization, EOS Trans. AGU, 87(36), Jt. Assem. Suppl., Abstract NS31A-05.

120. Schillig P. C.*, Devlin J. F., McGlashan M. A. and G. P. Tsoflias (2006), A Novel Approach for Aquifer Characterization Based on Direct Groundwater Velocity Measurements and GPR, The Geological Society of America Annual Meeting, 22-25 October, GSA Abstracts with Programs Vol. 38, No. 7.

121. Devlin J. F., Schillig P. C.*, McGlashan M. A. and G. P. Tsoflias (2006), Direct Groundwater Velocity Estimates from PVP and GPR Measurements, The Geological Society of America Annual Meeting, 22-25 October, GSA Abstracts with Programs Vol. 38, No. 7.

122. Tsoflias G. P., Steeples D. W., Czarnecki G.*, Sloan S. D.* and R. Eslick* (2005), 3-D Autojuggie: Automating Deployment of Two-Dimensional Geophone Arrays for Efficient Ultra-Shallow Seismic-Reflection Surveys, EOS Trans. AGU, 86(52), Fall Meet. Suppl., Abstract U21B-0815.

123. McGlashan M. A.*, Tsoflias G. P., Devlin J. F. and P. C. Schillig* (2005), Characterizing High Resolution Aquifer Heterogeneities Using Borehole Radar and Multi-Level Point Velocity Probes, EOS Trans. AGU, 86(52), Fall Meet. Suppl., Abstract H41F-0478.

124. McGlashan M. A.*, Devlin J. F. and G. P. Tsoflias (2005), High resolution groundwater velocity monitoring using multi-level point velocity probes, 50^th Midwest Groundwater Conference, Urbana , Illinois – Nov. 1-3, 2005.

125. McGlashan M. A.*, P. Schillig*, Devlin J. F. and G. P. Tsoflias (2005), Geophysics Meets Hydrogeology While Characterizing the Heterogeneity in the World’s Most Homogeneous Aquifer, 14^th Annual Kansas Hydrology Meeting, Topeka, Kansas – Nov. 18, 2005.

126. Tsoflias G. P. and A. Hoch* (2004), Towards the Quantitative Characterization of Fractures Using GPR, EOS Trans. AGU, 85(47), Abstract H13G-05.

127. Tsoflias, G. P. (2004), Ground-Penetrating Radar (GPR) Methods in Environmental Geoscience, AEG regional meeting on State of the practice site investigation methods to support design, October 23, 2004, Kansas City, KS.

128. Vincent P. D.*, Tsoflias G. P., Sloan S. D.* and D. W. Steeples (2004), Processing Ultra-Shallow Reflection Data in Areas with Laterally Varying Velocities, AGU, Fall Meeting, EOS Trans. AGU, 85(47), Abstract H14C-05.

129. Blair, J. D., Clark J., Steeples D. W., Vincent P. D.*, and G. P. Tsoflias (2004), Reducing the cost of shallow seismic data acquisition: A comparative analysis of the seismic response of rigidly interconnected geophones attached to steel media of various shapes, 227th meeting of the American Chemical Society, March 28-April 1, Anaheim, CA, ENVR 74.

130. Healey J, Tsoflias G. P.†, Steeples D. W., Vincent P.*, Sloan S. D.*, and C. D. McElwee (2003), Geophysical Techniques Applied to a Stream-Aquifer System, Eos Trans. AGU, 84(47), Abstract H31B-0466.

131. Halihan T., Zahm C. K., Tsoflias G. P., Mace R. E and J. M. Sharp, Jr. (1999), Use of Outcrop and GPR Data to Interpret Flow in Karst Aquifers: Recent Results from the University of Texas, 1999 AKMA Conference Transactions.

132. Tsoflias G. P., J. M. Sharp, Jr. and M. A. Muldoon (1998), Ground-Penetrating Radar Investigation of the Byron Dolomite: An Integrated Approach to Aquifer Characterization, 1998 SEPM Research Conference Transactions.

133. Phillips J. D., Carpenter D., Bartelemann M., Murray P., Tsoflias G., McConnell T., Saul S. and G. Kuhlman (1995), High resolution aeromagnetic mapping of oil/ gas field fault zones in Wilson/ Karnes counties, Texas, Eos, Trans. AGU, 76(46), p. 175.

134. Tsoflias G. P., G. A. Bollinger and J. K. Costain (1990), Cyclicities in the Seismicity of the Charlevoix Zone in the St. Lawrence Valley, Seismological Society of America, Eastern Section, 62^nd Annual Meeting, Seismological Research Letters, Vol. 61, No. 3, p. 163.