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HEDLIN, MICHAEL

Research Geophysicist

Degrees:

• B.S., University of Saskatchewan, Canada
• M.S., University of Alberta, Canada
• Ph.D., UCSD, Scripps Institution of Oceanography

Research Interests:

• Analysis of acoustic signals from large-scale atmospheric phenomena
• Reduction of noise due to atmospheric turbulence
• Use of seismic and acoustic energy for nuclear test ban verification
• Structure of Earth's crust and mantle

Courses Recently Taught:

• SIO10: The Earth

Honors and Awards:

• Nominee, Scripps outstanding undergraduate teaching award, 2008
• Nominee, Scripps outstanding undergraduate teaching award, 2007
• Nominee, Scripps outstanding undergraduate teaching award, 2006

Mentoring:

• Farrell, Anna (Other; 2006-2006)
• Lampert, Michael (Other; 2006-2006)
• Matoza, Robin (Graduate; 2005-2009)
• Arrowsmith, Stephen (Post Doc; 2004-2006)
• Wendel, Dierdre (Graduate; 1995-1997)

1998, A global test of a time-frequency small-event discriminant, Bull. seism. soc. Am., 88, 973-988

1998, Evidence for partial melt at the core-mantle boundary north of Tonga from the strong scattering of seismic waves, Nature, 391, 682-685

1998, Ionospheric signature of surface mine blasts from Global Positioning System measurements, Geophysical Journal International, 132, 191-202

1998, Migration of backscatter data from the Mid-Atlantic Ridge, Journal of the Acoustical Society of America, 103, 1787-1803

1998, Monitoring Nuclear Tests, Science, 281, 1967-1968

1998, PKP and PKKP precursor observations: Implications for the small-scale structure of the deep mantle and core, Geodynamics, 28, 37-55

1999, Experiments in migration processing of SS precursor data to image upper mantle discontinuity structure, Journal of Geophysical Research-Solid Earth, 104, B4, 7229-7242

2000, An analysis of large-scale variations in small-scale mantle heterogeneity using Global Seismographic Network recordings of precursors to PKP, Journal of Geophysical Research-Solid Earth, 105, B6, 13655-13673

2000, Old Seismic Data Yield New Insights, EOS, 81, 469, 472-473

2001, Correction to "An analysis of large-scale variations in small-scale mantle heterogeneity using Global Seismographic Network recordings of precursors to PKP", Journal of Geophysical Research, 107, B4, 10.1029.

2002, An optical fiber infrasound sensor: a new lower limit on atmospheric pressure noise between 1 Hz and 10 Hz, Journal of the Acoustical Society of America, 113, 2474-2479

2002, Characterization of Mining Explosions at Regional Distances, Reviews of Geophysics, 40, 4, 1011

2002, Identification of mining blasts at mid- to far-regional distances using low-frequency seismic signals, Pure and Applied Geophysics, 159, 4, 831-864.

2002, Listening to the Secret Sounds of Earths Atmosphere, EOS, 83, 557, 564-565

2002, Probing mid-mantle heterogeneity using PKP coda waves, Physics of the Earth and Planetary Interiors, 130, 195-208

2002, Surveying infrasonic noise on oceanic islands, Pure and Applied Geophysics, 159, 5, 1127-1152

2003, Evaluation of rosette infrasonic noise-reducing spatial filters, Journal of the Acoustical Society of America, 114, 1807-1820

2003, Infrasonic wind noise reduction by barriers and spatial filters, Journal of the Acoustical Society of America, 114, 1379-1386

2004, Monitoring high altitude hypersonic objects with infrasound, EOS, 85, 433, 440-441.

2005, Observations of infrasound from surf in Southern California, GRL, 32, No. 9, L09810,doi:10.1029/2005GL022761.

2005, The use of impedance matching capillaries for reducing resonance in rosette spatial filters, J. Acoust. Soc. Am, 117, 1880-1888

2006, An infrasound array study of Mount St Helens, Journal of Volcanology and Geothermal Research, in press.

2006, Discrimination of delay-fired mining events in Wyoming, Bulletin of the Seismological Society of America, in press.

2006, Infrasonic Monitoring, Yearbook of Science and Technology, McGraw-Hill, 163-166.

2006, Infrasound, Acoustics Today, 2, 9-19.

2006, The sound of silence, Physics World, 19, 21-25.

2006, Matoza, R.S., Hedlin, M.A.H., Garces, M.A., An infrasound array study of Mount St Helens, Journal of Volcanology and Geothermal Research. v160, issues 3-4, 249-262.

2006, Hedlin, M.A.H., Infrasound. McGraw-Hill Encyclopedia of Science and Technology, DOI 10.1036/1097-8542.344800.

2006, Arrowsmith, S.J., Drob, D.P., Hedlin, M.A.H. and Edwards, W., A joint seismic and acoustic study of the Washington State bolide: Observations and modeling, Journal of Geophysical Research. v112, D09304, doi:10.1029/ 2006JD008001.

2007, Arrowsmith, S.J., Hedlin, M.A.H., Arrowsmith, M.D. and Stump, B.W., Identification of delay-fired mining explosions using seismic arrays: Application to the PDAR array in Wyoming, Bull. Seism. Soc. Am, v97, nbr. 3, p989-1001.

2007, Arrowsmith, S.J., Hedlin, M.A.H., Stump, B.W. and Arrowsmith, M.D., Infrasonic signals from mining explosions, Bull. Seism. Soc. Am, v98, nbr 2 p768-777.

2008, Garces, M., Fee, D., Steffke, A., McCormack, D., Servranckx, R., Bass, H., Hetzer, C., Hedlin, M., Matoza, R., Yepes, H. and Ramon, P., Prototype ASHE volcano monitoring system captures the acoustic fingerprint of stratospheric ash injection, EOS, v89, p377-378.

2008, Moran, S.C., Matoza, R.S., Garces, M.A., Hedlin, M.A.H., Bowers, D. Scott, W.E., Sherrod, D.R. and Vallance, J.W., Seismic and acoustic recordings of an unusually large rockfall at Mount St. Helens, Washington, Geophysical Research Letters, in press.

2008, Herrin, G., Bass, H., Andre, B., Woodward, B., Drob, D., Hedlin, M., Garces, M., Golden, P., Norris, D., de Groot-Hedlin, C., Walker, K., Szuberla, C., Whitaker, R., and Shields, D., High-altitude infrasound calibration experiments, Acoustics Today, v4, 9-21.

2008, Walker, K., Zumberge, M., Hedlin, M.A.H., and Shearer, P., Methodologies for determining infrasound phase velocity direction with an array of directional acoustic sensors, J. Acoust. Soc. Am., in press.

2008, de Groot-Hedlin, C.D., Hedlin, M.A.H., Walker, K., Drob., D., and Zumberge, M., Study of propagation from the shuttle Atlantis using a large seismic network, J. Acoust. Soc. Am., in press.

2008, de Groot-Hedlin, C.D. and Hedlin, M.A.H., Atmospheric variability and infrasound monitoring, in review with “Contribution of a global continuous infrasound monitoring for atmospheric studies”, Springer Geosciences.

2008, Walker, K. and Hedlin, M.A.H., A review of infrasound wind noise reduction technologies, in review with “Contribution of a global continuous infrasound monitoring for atmospheric studies”, Springer Geosciences.

2008, Arrowsmith, S.J., Whitaker, R., Burlacu, R., Stump, B., Hedlin, M.A.H., Randall, G., Hayward, C., ReVelle, D., Regional monitoring of infrasound events using multiple arrays: Application to Utah and Washington State, Geophysical Journal International. in press.