Duncan Agnew

Professor/Researcher

Room: Munk Lab 221

Institute of Geophysics and Planetary Physics,
Scripps Institution of Oceanography,
University of California San Diego,
La Jolla, CA 92093-0225, USA.

Telephone: (858) 534-2590

Email: dagnew@ucsd.edu

Website: http://www.igpp.ucsd.edu/~agnew

Research Summary for 2006: Download PDF (145.625KB)

Research Interests:

• Crustal deformation measurement and interpretation
• Geophysical data analysis
• History of the Earth sciences
• Geophysical instrumentation

Courses Taught:

• SIO223 (Geophysical Data Analysis)
• SIO223A (Geophysical Data Analysis I)
• SIO223B (Geophysical Data Analysis II)
• SIO225 (Physics of Earth Materials)
• SIO239 (Special Topics in Geophysics)
• SIO299 (Research)

Recent publications: ^†

• Wyatt, F., R. Bilham, R. J. Beavan, A. G. Sylvester, T. Owen, A. Harvey, C. Macdonald, D. Jackson, and D. C. Agnew (1984). Comparing tiltmeters for use in crustal deformation measurements: a preliminary report, Geophys. Res. Lett., 11, 963-966.
• Wyatt, F., G. Cabaniss, and D. C. Agnew (1982). A comparison of tiltmeters at tidal frequencies, Geophys. Res. Lett., 9, 743-746.
• Wyatt, F., D. C. Agnew, A. Linde, and I. S. Sacks (1983). Borehole strainmeter studies at Pi\(~non Flat Observatory, Year Book Carnegie Inst. Washington, 82, 533-538.
• Wyatt, F. K., S-T. Morrissey, and D. C. Agnew (1988). Shallow borehole tilt--A reprise, J. Geophys. Res., 93, 9197-9201.
• Wyatt, F. K., D. C. Agnew, and M. Gladwin (1994). Continuous measurements of crustal deformation for the 1992 Landers earthquake sequence, Bull. Seismol. Soc. Amer., 84, 768-779.
• Wyatt, F. K., and D. C. Agnew (2004). The PIN1 and PIN2 GPS Sites at Pi\(~non Flat Observatory, SIO Technical Report: http://repositories.cdlib.org/sio/techreport/33/, Scripps Institution of Oceanography.
• Wang, L., Z. Zhao, Z. Wang, and D. C. Agnew (1987). Long period source parameters of the Wuqia, Xinjiang earthquake of August 23, 1985: Results from inversion of the records of the IDA network, Acta Seismol. Sinica, 2, 108-111.
• Vidale, J. E., D. C. Agnew, M. J. S. Johnston, and D. H. Oppenheimer (1998). Absence of earthquake correlation with earth tides: an indication of high preseismic fault stress rate, J. Geophys. Res., 103, 24567-24572.
• Vidale, J. E., D. C. Agnew, M. J. S. Johnston, and D. H. Oppenheimer (1998). Absence of earthquake correlation with earth tides: an indication of high preseismic fault stress rate, J. Geophys. Res., 103, 24567-24572.
• Tamura, Y., and D. C. Agnew (2008). Baytap08 Users Manual, SIO Technical Report: http://repositories.cdlib.org/sio/techreport/82/, Scripps Institution of Oceanography.
• Sandwell, D. T., L. Sichoix, D. Agnew, Y. Bock, and J.-B. Minster (2000). Near real-time radar interferometry of the $roman M sub roman W$ 7.1 Hector Mine earthquake, Geophys. Res. Lett., 27, 3101-3104.
• Rolandone, F., R. Burgmann, D. C. Agnew, I. A. Johanson, D. C. Templeton, M. A. d'Alessio, S. J. Titus, C. DeMets, and B. Tikoff (2008). Aseismic slip and fault-normal strain along the central creeping section of the San Andreas fault, Geophys. Res. Lett., 35, L14305.10.1029/2008GL034437
• Rojstaczer, S., and D. C. Agnew (1989). The influence of formation material properties on the response of water levels in wells to earth tides and atmospheric loading, J. Geophys. Res., 94, 12403-12411.
• Riedesel, M., D. C. Agnew, J. Berger, and F. Gilbert (1980). Stacking for the frequencies and Q's of \d\s-20\s0\uS\d\s-20\s0\u and \d\s-01\uS\d\s-20\s0\u, Geophys. J. R. Astron. Soc., 62, 457-471.
• Owen, S., G. Anderson, D. C. Agnew, H. Johnson, K. Hurst, R. Reilinger, Z.-K. Shen, J. Svarc, and T. Baker (2002). Early postseismic displacements from the M\d\s-2W\s0\u 7.1 Hector Mine earthquake as measured by survey-mode GPS, Bull. Seismol. Soc. Amer., 92, 1423-1432.
• Nikolaidis, R., Y. Bock, P. J. de Jonge, P. Shearer, D. C. Agnew, and M. Van\0Domselaar (2001). Seismic wave observations with the Global Positioning System, J. Geophys. Res., 106, 21897-21916.
• Meltzner, A. J., K. Sieh, M. Abrams, D. C. Agnew, K. W. Hudnut, J.-P. Avouac, and D. H. Natawidjaja (2006). Uplift and subsidence associated with the great Aceh-Andaman earthquake of 2004, J. Geophys. Res., 111, B02407.10.1029/2005JB003891
• Liu, H.-P., E. D. Sembera, R. E. Westerlund, J. B. Fletcher, P. Reasenberg, and D. C. Agnew (1985). Tidal variation of seismic travel times in a Massachusetts granite quarry, Geophys. Res. Lett., 12, 243-246.
• Linde, A., I. Sacks, M. Johnston, F. Wyatt, and D. C. Agnew (1982). The borehole strainmeter program in California--Installation and preliminary results, Carnegie Inst. Wash. Yearbook, 81, 517-520.
• Legg, M., and D. C. Agnew (1979). The 1862 earthquake in San Diego, pp. 139-141 in Earthquakes and Other Perils, San Diego Region, P. L. Abbott and W. J. Elliott, eds. (San Diego: San Diego Assoc. of Geologists for the Geol. Soc. of America)
• Larson, K. M., F. H. Webb, and D. C. Agnew (1991). Application of the Global Positioning System to crustal deformation measurement, 2. The influence of errors in orbit determination networks, J. Geophys. Res., 96, 16567-16584.
• Larson, K. M., and D. C. Agnew (1991). Application of the Global Positioning System to crustal deformation measurement, 1. Precision and accuracy, J. Geophys. Res., 96, 16547-16565.
• Larsen, S., D. C. Agnew, and B. Hager (1993). Strain accumulation in the Santa Barbara Channel: 1970-1988, J. Geophys. Res., 98, 2119-2133.
• Knopoff, L., P. A. Rydelek, W. Zu\*:rn, and D. C. Agnew (1989). Observations of load tides at the South Pole, Phys. Earth Planet. Inter., 54, 33-37.
• King, N. E., D. C. Agnew, D. C., and F. Wyatt, (1988). Comparing strain events: a case study for the Homestead Valley earthquakes, Bull. Seismol. Soc. Amer., 78, 1693-1706.
• King, N. E., 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, J. Geophys. Res., 112, B03409.10.1029/2006JB004448
• King, N. E., and D. C. Agnew (1991). How large is the retrograde annual wobble?, Geophys. Res. Lett., 18, 1735-1738.
• Jones, G., T. Hilde, G. Sharman, and D. C. Agnew (1979). Fault patterns in outer trench walls and their tectonic significance, J. Phys. Earth, 26, S85-S101.
• Johnston, M. J. S., A. T. Linde, and D. C. Agnew (1994). Continuous borehole strain in the San Andreas fault zone before during, and after the 28 June 1992, $M sub w$ 7.3 Landers, California earthquake, Bull. Seismol. Soc. Amer., 84, 799-805.
• Johnson, H., F. Wyatt, and D. C. Agnew (1994). Present-day crustal deformation in southern California, J. Geophys. Res., 99, 23951-23974.
• Johnson, H., and D. Agnew (1995). Monument motion and measurements of crustal velocities, Geophys. Res. Lett., 22, 2905-2908.
• Johnson, H. O., F. K. Wyatt, D. C. Agnew, and W. Zu\*:rn (1995). Tidal tilts at Pinyon Flat, California, measured at depths of 24 and 120 meters, pp. 129-136 in Proc. Twelfth Intl. Symposium on Earth Tides, (Beijing: Science Press)
• Johnson, H. O., D. C. Agnew, and K. Hudnut (1994). Extremal bounds on earthquake moment from geodetic data: application to the Landers earthquake, Bull. Seismol. Soc. Amer., 84, 660-667.
• Hart, R. H. G., M. T. Gladwin, R. L. Gwyther, D. C. Agnew, and F. K. Wyatt (1996). Tidal calibration of borehole strainmeters: removing the effects of local inhomogeneity, J. Geophys. Res., 101, 25553-25571.
• Gonzalez-Garcia, J. J., L. Prawirodirdjo, Y. Bock, and D. Agnew (2003). Guadalupe Island, Mexico as a new constraint for Pacific plate motion, Geophys. Res. Lett., 30, 1872.10.1029/2003GL017732
• Gomberg, J., and D. C. Agnew (1996). The accuracy of seismic estimates of dynamic strains: an evaluation using strainmeter and seismometer data from Pi\(~non Flat Observatory, California, Bull. Seismol. Soc. Amer., 86, 212-220.
• Fialko, Y., M. Simons, and D. Agnew (2001). The complete (3-D) surface displacement field in the epicentral area of the 1999 M$""sub w$ 7.1 Hector Mine earthquake, California, from space geodetic observations, Geophys. Res. Lett., 28, 3063-3066.
• Fialko, Y., D. Sandwell, D. Agnew, M. Simons, P. Shearer, and B. Minster (2002). Deformation on nearby faults induced by the 1999 Hector Mine earthquake, Science, 297, 1858-1862.
• Feigl, K. L., D. C. Agnew, Y. Bock, D. Dong, A. Donnellan, B. H. Hager, T. A. Herring, D. D. Jackson, T. H. Jordan, R. W. King, S. Larsen, K. M. Larson, M. H. Murray, Z. Shen, and F. H. Webb (1993). Space geodetic measurement of crustal deformation in central and southern California, 1984-1992, J. Geophys. Res., 98, 21677-21712.
• Elkhoury, J. E., E. E. Brodsky, and D. C. Agnew (2006). Seismic waves increase permeability, Nature, 441, 1135-1138.
• Dixon, T. H., G. Blewitt, K. Larson, D. C. Agnew, B. H. Hager, P. Kroger, L. Skrumeda, and W. E. Strange (1990). GPS measurements of regional deformation in southern California, EOS Trans. Amer. Geophys. Union, 71, 1051-1053.
• Davis, P., P. Rydelek, D. C. Agnew, and A. Okamura (1987). Observation of tidal tilt on Kilauea Volcano, Hawaii, Geophys. J. R. Astron. Soc., 90, 233-244.
• Bock, Y., S. Wdowinski, P. Fang, S. Williams, H. Johnson, J. Behr, J. Genrich, J. Dean, M. van\0Domeselaar, D. C. Agnew, F. Wyatt, K. Stark, B. Oral, K. Hudnut, R. King, T. Herring, W. Young, D. Jackson, and W. Gurtner (1997). Southern California Permanent GPS Geodetic Array: Continuous measurements of crustal deformation between the 1992 Landers and 1994 Northridge earthquakes, J. Geophys. Res., 102, 18013-18033.
• Bock, Y., S. Wdowinski, P. Fang, S. Williams, H. Johnson, J. Behr, J. Genrich, J. Dean, M. van\0Domeselaar, D. C. Agnew, F. Wyatt, K. Stark, B. Oral, K. Hudnut, R. King, T. Herring, W. Young, D. Jackson, and W. Gurtner (1997). Southern California Permanent GPS Geodetic Array: Continuous measurements of crustal deformation between the 1992 Landers and 1994 Northridge earthquakes, J. Geophys. Res., 102, 18013-18033.
• Bock, Y., D. C. Agnew, P. Fang, J. F. Genrich, B. H. Hager, T. A. Herring, K. W. Hudnut, R. W. King, S. Larsen, J. B. Minster, K. Stark, S. Wdowinski, and F. K. Wyatt (1993). Detection of crustal deformation from the Landers earthquake sequence using continuous geodetic measurements, Nature, 361, 337-340.
• Berger, J., D. C. Agnew, R. Parker, and W. Farrell (1979). Seismic system calibration: 2. Cross-spectral calibration using random binary signals, Bull. Seismol. Soc. Amer., 69, 271-288.
• Astiz, L., P. M. Shearer, and D. C. Agnew (2000). Precise relocations and stress change calculations for the Upland earthquake sequence in southern California, J. Geophys. Res., 105, 2937-2953.
• Anderson, J. G., T. K. Rockwell, and D. C. Agnew (1989). Past and possible future earthquakes of significance to the San Diego region, Earthq. Spectra, 5, 299-335.
• Anderson, G., D. C. Agnew, and H. O. Johnson (2003). Salton Trough regional deformation estimated from combined trilateration and survey-mode GPS data, Bull. Seismol. Soc. Amer., 93, 2402-2414.
• Agnew, D. C., S. Owen, Z.-K. Shen, G. Anderson, J. Svarc, H. Johnson, K. E. Austin, and R. Reilinger (2002). Coseismic displacements from the Hector Mine, California, earthquake: results from survey-mode GPS measurements, Bull. Seismol. Soc. Amer., 92, 1355-1364.
• Agnew, D. C., M. Legg, and C. Strand (1979). Earthquake history of San Diego, pp. 123-138 in Earthquakes and Other Perils, San Diego Region, P. L. Abbott and W. J. Elliott, eds. (San Diego: San Diego Assoc. of Geologists for the Geol. Soc. of America)
• Agnew, D. C., J. Berger, W. E. Farrell, J. F. Gilbert, G. Masters, and D. Miller (1986). Project IDA: A decade in review, EOS Trans. Amer. Geophys. Union, 67, 203-212.
• Agnew, D. C., J. Berger, R. Buland, W. Farrell, and F. Gilbert (1976). International Deployment of Accelerometers: a network for very long period seismology, EOS Trans. Amer. Geophys. Union, 57, 180-188.
• Agnew, D. C., and W. Farrell (1978). Self-consistent equilibrium ocean tides, Geophys. J. R. Astron. Soc., 55, 171-181.
• Agnew, D. C., and W. Ellsworth (1991). Earthquake prediction and long-term hazard assessment, Rev. Geophys, 18, 877-889.
• Agnew, D. C., and K. Sieh (1978). A documentary study of the felt effects of the great California earthquake of 1857, Bull. Seismol. Soc. Amer., 68, 1717-1729.
• Agnew, D. C., and K. M. Larson (2007). Finding the repeat times of the GPS constellation, GPS Solutions, 11, 71-76.
• Agnew, D. C., and K. M. Hodgkinson (2007). Designing compact causal digital filters for low-frequency strainmeter data, Bull. Seismol. Soc. Amer., 97, 91-99.
• Agnew, D. C., and J. Berger (1978). Vertical seismic noise at very low frequencies, J. Geophys. Res., 83, 5420-5424.
• Agnew, D. C., and H. Arp (1973). A list of quasi-stellar radio source candidates from the 3C and 4C catalogs between declination -7 and +40, Public. Astron. Soc. Pacific, 85, 162-173.
• Agnew, D. C., and F. K. Wyatt (2003). Long-base laser strainmeters: a review, SIO Technical Report: http://repositories.cdlib.org/sio/techreport/2/, Scripps Institution of Oceanography.
• Agnew, D. C. (2008). Richter, Charles Francis, pp. 241-243 in Complete Dictionary of Scientific Biography, (Detroit: Charles Scribner's Sons)
• Agnew, D. C. (2008). Menard, Henry William, pp. 96-97 in Complete Dictionary of Scientific Biography, (Detroit: Charles Scribner's Sons)
• Agnew, D. C. (2008). Benioff, Victor Hugo, pp. 243-245 in Complete Dictionary of Scientific Biography, (Detroit: Charles Scribner's Sons)
• Agnew, D. C. (2007). Earth tides, pp. 163-195 in Treatise on Geophysics: Geodesy, (New York: Elsevier)
• Agnew, D. C. (2007). Before PBO: an overview of continuous strain and tilt measurements in the United States, J. Geodetic Soc. Japan, 53, 157-182.
• Agnew, D. C. (2006). Reports of the Great California Earthquake of 1857, SIO Technical Report: http://repositories.cdlib.org/sio/techreport/50/, Scripps Institution of Oceanography.
• Agnew, D. C. (2005). GHAM: a compact global geocode suitable For sorting, Comput. Geosci., 31, 1042-1047.
• Agnew, D. C. (2004). Robert FitzRoy and the myth of the `Marsden square': Transatlantic rivalries in early marine meteorology, Notes Records Roy. Soc., 58, 21-46.
• Agnew, D. C. (2002). History of seismology, pp. 3-13 in IASPEI International Handbook of Earthquake and Engineering Seismology, (San Diego: Academic Press)
• Agnew, D. C. (2001). Map projections to show the possible effects of surface loading, J. Geod. Soc. Japan, 47, 255-260.
• Agnew, D. C. (1997). NLOADF: a program for computing ocean-tide loading, J. Geophys. Res., 102, 5109-5110.
• Agnew, D. C. (1996). SPOTL: Some Programs for Ocean-Tide Loading, SIO Reference Series 96-8, Scripps Institution of Oceanography.
• Agnew, D. C. (1995). Ocean-load tides at the South Pole: a validation of recent ocean-tide models, Geophys. Res. Lett., 22, 3063-3066.
• Agnew, D. C. (1992). The time-domain behavior of power-law noises, Geophys. Res. Lett., 19, 333-336.
• Agnew, D. C. (1991). How complete is the pre-instrumental record of earthquakes in Southern California?, pp. 75-88 in Environmental Perils, San Diego Region, P. L. Abbott and W. J. Elliott, eds. (San Diego: San Diego Assoc. of Geologists for the Geol. Soc. of America)
• Agnew, D. C. (1990). The use of time-of-day seismicity maps for earthquake/explosion discrimination by local networks, with an application to the seismicity of San Diego County, Bull. Seismol. Soc. Amer., 80, 747-750.
• Agnew, D. C. (1989). Robust pilot spectrum estimation for the quality control of digital seismic data, Bull. Seismol. Soc. Amer., 79, 180-188.
• Agnew, D. C. (1989). Robust pilot spectrum estimation for the quality control of digital seismic data, Bull. Seismol. Soc. Amer., 79, 180-188.
• Agnew, D. C. (1986). Strainmeters and tiltmeters, Rev. Geophys., 24, 579-624.
• Agnew, D. C. (1986). Detailed analysis of tide gauge data: A case history, Marine Geod., 10, 231-255.
• Agnew, D. C. (1983). Conservation of mass in tidal loading computations, Geophys. J. R. Astron. Soc., 72, 321-325.
• Agnew, D. C. (1981). Nonlinearity in rock: evidence from earth tides, J. Geophys. Res., 86, 3969-3978.
• Agnew, D. C. (1979). Tsunami history of San Diego, pp. 117-122 in Earthquakes and Other Perils, San Diego Region, P. L. Abbott and W. J. Elliott, eds. (San Diego: San Diego Assoc. of Geologists for the Geol. Soc. of America)
• Agnew, D. C. (1978). The 1852 Fort Yuma earthquake: two additional accounts, Bull. Seismol. Soc. Amer., 68, 1761-1762.
• Agnew, D. (1998). Tides, Earth, pp. 810-812 in Sciences of the Earth: An Encyclopedia of Places, People, and Phenomena, (New York: Garland Publishing)
• Agnew, D. (1998). Instruments, Gravity, pp. 453-455 in Sciences of the Earth: An Encyclopedia of Places, People, and Phenomena, (New York: Garland Publishing)
• Agnew, D. (1998). Gravity since 1800, pp. 403-406 in Sciences of the Earth: An Encyclopedia of Places, People, and Phenomena, (New York: Garland Publishing)
• Agnew, D. (1989). Seismology: History, pp. 1198-1202 in Encyclopedia of Solid Earth Geophysics, (New York: Van Nostrand Reinhold)
• Agnew, D. (1989). Seismic Instrumentation, pp. 1033-1037 in Encyclopedia of Solid Earth Geophysics, (New York: Van Nostrand Reinhold)
• Abercrombie, R. E., D. C. Agnew, and F. K. Wyatt (1995). Testing a model of earthquake nucleation, Bull. Seismol. Soc. Amer., 85, 1873-1878.