Michael Hedlin

Researcher

Room: Revelle Lab 2107

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

Telephone: (858) 534-8773

Email: mhedlin@ucsd.edu

Research Summary for 2006: Download PDF (264.747KB)

Research Interests:

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

Courses Taught:

• ERTH10 (The Earth)
• ERTH15 (Natural Disasters)
• SIO10 (The Earth)
• SIO299 (Research)

Recent publications: ^†

• 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, 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, 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, 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, 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, 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.
• 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.
• 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.
• 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, Infrasound, Acoustics Today, 2, 9-19.
• 2006, Infrasonic Monitoring, Yearbook of Science and Technology, McGraw-Hill, 163-166.
• 2006, Hedlin, M.A.H., Infrasound. McGraw-Hill Encyclopedia of Science and Technology, DOI 10.1036/1097-8542.344800.
• 2006, Discrimination of delay-fired mining events in Wyoming, Bulletin of the Seismological Society of America, in press.
• 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.
• 2006, An infrasound array study of Mount St Helens, Journal of Volcanology and Geothermal Research, in press.
• 2005, The use of impedance matching capillaries for reducing resonance in rosette spatial filters, J. Acoust. Soc. Am, 117, 1880-1888
• 2005, Observations of infrasound from surf in Southern California, GRL, 32, No. 9, L09810,doi:10.1029/2005GL022761.
• 2004, Monitoring high altitude hypersonic objects with infrasound, EOS, 85, 433, 440-441.
• 2003, Infrasonic wind noise reduction by barriers and spatial filters, Journal of the Acoustical Society of America, 114, 1379-1386
• 2003, Evaluation of rosette infrasonic noise-reducing spatial filters, Journal of the Acoustical Society of America, 114, 1807-1820
• 2002, Surveying infrasonic noise on oceanic islands, Pure and Applied Geophysics, 159, 5, 1127-1152
• 2002, Probing mid-mantle heterogeneity using PKP coda waves, Physics of the Earth and Planetary Interiors, 130, 195-208
• 2002, Listening to the Secret Sounds of Earths Atmosphere, EOS, 83, 557, 564-565
• 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, Characterization of Mining Explosions at Regional Distances, Reviews of Geophysics, 40, 4, 1011
• 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
• 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.
• 2000, Old Seismic Data Yield New Insights, EOS, 81, 469, 472-473
• 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
• 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
• 1998, PKP and PKKP precursor observations: Implications for the small-scale structure of the deep mantle and core, Geodynamics, 28, 37-55
• 1998, Monitoring Nuclear Tests, Science, 281, 1967-1968
• 1998, Migration of backscatter data from the Mid-Atlantic Ridge, Journal of the Acoustical Society of America, 103, 1787-1803
• 1998, Ionospheric signature of surface mine blasts from Global Positioning System measurements, Geophysical Journal International, 132, 191-202
• 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, A global test of a time-frequency small-event discriminant, Bull. seism. soc. Am., 88, 973-988