Robin Matoza

Associate Professor

Contact Phone


Office Location

Webb 2114


Volcano geophysics, Volcano seismology, Volcano acoustics, Infrasound, Seismo-acoustics



I use seismic and infrasound waves to understand how volcanoes work. Infrasound is atmospheric sound with frequencies below 20 Hz (20 Hz is the lower frequency limit of human hearing). With seismology, I study magmatic, hydrothermal, and faulting processes occurring within and around volcanoes. With infrasound, I study the mechanisms and dynamics of explosive eruptions and shallow volcanic degassing. This work is focused on understanding the geophysical signatures of volcanic unrest and eruption, with application in monitoring and mitigating volcanic hazards. More generally, I am interested in all aspects of infrasound and seismo-acoustic research, including numerous natural and man-made sources as well as infrasound propagation through the atmosphere. 


Last updated August 2020

[43] Fitzgerald, R.H., B.M. Kennedy, C. Gomez, T.M. Wilson, B. Simons, G.S. Leonard, R.S. Matoza, A.D. Jolly, and E. Garaebiti (2020), Volcanic ballistic projectile deposition from a continuously erupting volcano: Yasur volcano, Vanuatu, Volcanica, 3(2), 183-204, doi:10.30909/vol.03.02.183204 (link)

[42] Sanderson, R.W., R.S. Matoza, D. Fee, M.M. Haney, and J.J. Lyons (2020), Remote detection and location of explosive volcanism in Alaska with the EarthScope Transportable Array, J. Geophys. Res. Solid Earth, 125, e2019JB018347, doi:10.1029/2019JB018347 (link)

[41] Maher, S.P., R.S. Matoza, C.D. de Groot‐Hedlin, K.L. Gee, D. Fee, and A. Yokoo (2020), Investigating spectral distortion of local volcano infrasound by nonlinear propagation at Sakurajima Volcano, Japan, J. Geophys. Res. Solid Earth, 125, e2019JB018284, doi:10.1029/2019JB018284 (link)

[40] Haney, M.M., D. Fee, K.F. McKee, J.J. Lyons, R.S. Matoza, A.G. Wech, G. Tepp, C. Searcy, and T.D. Mikesell (2020), Co-eruptive tremor from Bogoslof Volcano: Seismic wavefield composition at regional distances, Bull. Volcanol., 82:18, doi:10.1007/s00445-019-1347-0 (link)

[39] Iezzi, A.M., D. Fee, K. Kim, A.D. Jolly, and R.S. Matoza (2019), 3‐D acoustic multipole waveform inversion at Yasur Volcano, Vanuatu, J. Geophys. Res. Solid Earth, 124, 8679-8703, doi:10.1029/2018JB017073 (link)

[38] Matoza, R.S., A. Arciniega-Ceballos, R.W. Sanderson, G. Mendo-Pérez, A. Rosado-Fuentes, and B.A. Chouet (2019), High-broadband seismoacoustic signature of Vulcanian explosions at Popocatépetl volcano, Mexico, Geophys. Res. Lett., 46, 148–157, doi:10.1029/2018GL080802 (link)

[37] Ceranna, L., R.S. Matoza, P. Hupe, A. Le Pichon, and M. Landès (2019), Systematic array processing of a decade of global IMS infrasound data, in "Infrasound monitoring for atmospheric studies: Challenges in middle-atmosphere dynamics and societal benefits", ed. A. Le Pichon, E. Blanc, and A. Hauchecorne, Ch 13, pp 471-482, Springer, Cham, doi:10.1007/978-3-319-75140-5_13, ISBN:978-3-319-75140-5 (link)

[36] Matoza, R.S., D. Fee, D.N. Green, and P. Mialle (2019), Volcano infrasound and the International Monitoring System, in "Infrasound monitoring for atmospheric studies: Challenges in middle-atmosphere dynamics and societal benefits", ed. A. Le Pichon, E. Blanc, and A. Hauchecorne, Ch 33, pp 1023-1077, Springer, Cham, doi:10.1007/978-3-319-75140-5_33, ISBN:978-3-319-75140-5 (link)

[35] Allstadt, K.E., R.S. Matoza, A.B. Lockhart, S.C. Moran, J. Caplan-Auerbach, M.M. Haney, W.A. Thelen, and S.D. Malone (2018), Seismic and acoustic signatures of surficial mass movements at volcanoes, J. Volcanol. Geotherm. Res.364, 76-106, doi:10.1016/j.jvolgeores.2018.09.007 (link)

[34] McKee, K., D. Fee, M. Haney, R.S. Matoza, and J. Lyons (2018), Infrasound signal detection and back azimuth estimation using ground-coupled airwaves on a seismo-acoustic sensor pair, J. Geophys. Res. Solid Earth123, 6826-6844, doi:10.1029/2017JB015132 (link)

[33] Matoza, R.S., D. Fee, D.N. Green, A. Le Pichon, J. Vergoz, M.M. Haney, T.D. Mikesell, L. Franco, O.A. Valderrama, M.R. Kelley, K. McKee, and L. Ceranna (2018), Local, regional, and remote seismo-acoustic observations of the April 2015 VEI 4 eruption of Calbuco volcano, Chile, J. Geophys. Res. Solid Earth, 123, 3814–3827, doi:10.1002/2017JB015182 (link)

[32] Haney, M.M., R.S. Matoza, D. Fee, and D.F. Aldridge (2018), Seismic equivalents of volcanic jet scaling laws and multipoles in acoustics, Geophys. J. Int., 213, 623-636, doi:10.1093/gji/ggx554 (link)

[31] Jolly, A.D., R.S. Matoza, D. Fee, B.M. Kennedy, A.I. Iezzi, R.H. Fitzgerald, A.C. Austin, and R. Johnson (2017), Capturing the acoustic radiation pattern of strombolian eruptions using infrasound sensors aboard a tethered aerostat, Yasur volcano, Vanuatu, Geophys. Res. Lett.44, 9672–9680, doi:10.1002/2017GL074971 (link)

[30] McKee, K., D. Fee, A. Yokoo, R.S. Matoza, and K. Kim (2017), Analysis of gas jetting and fumarole acoustics at Aso Volcano, Japan, J. Volcanol. Geotherm. Res., 340, 16-29, doi:10.1016/j.jvolgeores.2017.03.029 (link)

[29] Matoza, R.S., D.N. Green, A. Le Pichon, P.M. Shearer, D. Fee, P. Mialle, and L. Ceranna (2017), Automated detection and cataloging of global explosive volcanism using the International Monitoring System infrasound network, J. Geophys. Res. Solid Earth, 122, 2947-2971, doi:10.1002/2016JB013356 (link)

[28] Fee, D., M.M. Haney, R.S. Matoza, A.R. Van Eaton, P. Cervelli, D.J. Schneider, and A.M. Iezzi (2017), Volcanic tremor and plume height hysteresis from Pavlof Volcano, Alaska, Science355, 6320, 45-48, doi:10.1126/science.aah6108 (link)

[27] Fee, D., M. Haney, R. Matoza, C. Szuberla, J. Lyons, and C. Waythomas (2016), Seismic envelope-based detection and location of ground-coupled airwaves from volcanoes in Alaska, Bull. Seismol. Soc. Am.106, 3, doi:10.1785/0120150244 (link)

[26] Matoza, R.S., B.A. Chouet, P.B. Dawson, P.M. Shearer, M.M. Haney, G.P. Waite, S.C. Moran, and T.D. Mikesell (2015), Source mechanism of small long-period events at Mount St. Helens in July 2005 using template matching, phase-weighted stacking, and full-waveform inversion, J. Geophys. Res. Solid Earth, 120, 6351-6364, doi:10.1002/2015JB012279 (link)

[25] Matoza, R.S., D. Fee, and T.M. Lopez (2014), Acoustic characterization of explosion complexity at Sakurajima, Karymsky, and Tungurahua Volcanoes, Seismol. Res. Lett., 85, 6, 1187-1199, doi:10.1785/0220140110 (link)

[24] Rowell, C.R., D. Fee, C.A.L. Szuberla, K. Arnoult, R.S. Matoza, P.P. Firstov, K. Kim, and E. Makhmudov (2014), Three-dimensional volcano-acoustic source localization at Karymsky Volcano, Kamchatka, Russia, J. Volcanol. Geotherm. Res.,  283, 101-115, doi:10.1016/j.jvolgeores.2014.06.015 (link)

[23] Matoza, R.S., P.M. Shearer, and P.G. Okubo (2014), High-precision relocation of long-period events beneath the summit region of Kilauea Volcano, Hawai`i, from 1986 to 2009, Geophys. Res. Lett., 3413-3421, 41, doi:10.1002/2014GL059819 (link)

[22] Lin, G., P.M. Shearer, R.S. Matoza, P.G. Okubo, and F. Amelung (2014), Three-dimensional seismic velocity structure of Mauna Loa and Kilauea volcanoes in Hawaii from local seismic tomography, J. Geophys. Res., 119, 4377-4392, doi:10.1002/2013JB010820 (link)

[21] Matoza, R.S., and D. Fee (2014), Infrasonic component of volcano-seismic eruption tremor, Geophys. Res. Lett., 41, 1964-1970, doi:10.1002/2014GL059301 (link)

[20] Matoza, R.S., D. Fee, T.B. Neilsen, K.L. Gee, and D.E. Ogden (2013), Aeroacoustics of volcanic jets: Acoustic power estimation and jet velocity dependence, J. Geophys. Res. Solid Earth, 118, 6269-6284, doi:10.1002/2013JB010303 (link)

[19] Fee, D., R.S. Matoza, K.L. Gee, T.B. Neilsen, and D.E. Ogden (2013), Infrasonic crackle and supersonic jet noise from the eruption of Nabro Volcano, Eritrea, Geophys. Res. Lett., 40, 1-5, doi:10.1002/grl.50827 (link)

[18] Matoza, R.S., P.M. Shearer, G. Lin, C.J. Wolfe, and P.G. Okubo (2013), Systematic relocation of seismicity on Hawaii Island from 1992 to 2009 using waveform cross correlation and cluster analysis, J. Geophys. Res. Solid Earth, 118, 2275-2288, doi:10.1002/jgrb.50189 (link)

[17] Green, D.N., L. Evers, D. Fee, R.S. Matoza, M. Snellen, P. Smets, and D. Simons (2013), Hydroacoustic, infrasonic and seismic monitoring of the submarine eruptive activity and sub-aerial plume generation at South Sarigan, May 2010, J. Volcanol. Geotherm. Res., 257, 31-43, doi:10.1016/j.jvolgeores.2013.03.006 (link)

[16] Garces, M.A., D. Fee, and R. Matoza (2013), Volcano Acoustics, Chapter 16, in “Modeling Volcanic Processes: The Physics and Mathematics of Volcanism”, ed. S.A. Fagents, T.K.P. Gregg, and R.M.C. Lopes, Cambridge University Press (link)

[15] Matoza, R.S., M. Landès, A. Le Pichon, L. Ceranna, and D. Brown (2013), Coherent ambient infrasound recorded by the International Monitoring System, Geophys. Res. Lett., 40, 429-433, doi:10.1029/2012GL054329 (link)

[14] Chouet, B.A., and R.S. Matoza (2013), A multi-decadal view of seismic methods for detecting precursors of magma movement and eruption, J. Volcanol. Geotherm. Res., 252, 108-175, doi:10.1016/j.jvolgeores.2012.11.013 (link)

[13] Fee, D., and R.S. Matoza (2013), An overview of volcano infrasound: from hawaiian to plinian, local to global, J. Volcanol. Geotherm. Res., 249, 123-139, doi:10.1016/j.jvolgeores.2012.09.002 (link)

[12] Green, D.N., R.S. Matoza, J. Vergoz, and A. Le Pichon (2012), Infrasonic propagation from the 2010 Eyjafjallajökull eruption: Investigating the influence of stratospheric solar tides, J. Geophys. Res., 117, D21202, doi:10.1029/2012JD017988 (link)

[11] Lalande, J.-M., O. Sèbe, M. Landès, P. Blanc-Benon, R.S. Matoza, A. Le Pichon, and E. Blanc (2012), Infrasound data inversion for atmospheric sounding, Geophys. J. Int., 190, 1, 687-701, doi:10.1111/j.1365-246X.2012.05518.x (link)

[10] Landès, M., L. Ceranna, A. Le Pichon, and R.S. Matoza (2012), Localization of microbarom sources using the IMS infrasound network, J. Geophys. Res., 117, D06102, doi:10.1029/2011JD016684 (link)

[09] Matoza, R.S., J. Vergoz, A. Le Pichon, L. Ceranna, D.N. Green, L.G. Evers, M. Ripepe, P. Campus, L. Liszka, T. Kvaerna, E. Kjartansson, and A. Hoskuldsson (2011), Long-range acoustic observations of the Eyjafjallajökull eruption, Iceland, April-May 2010, Geophys. Res. Lett., 38, L06308, doi:10.1029/2011GL047019 (link)

[08] Matoza R.S., A. Le Pichon, J. Vergoz, P. Herry, J. Lalande, H. Lee, I. Che, and A. Rybin (2011), Infrasonic observations of the June 2009 Sarychev Peak eruption, Kuril Islands: Implications for infrasonic monitoring of remote explosive volcanism, J. Volcanol. Geotherm. Res., 200, 35-48, doi:10.1016/j.jvolgeores.2010.11.022 (link)

[07] Matoza R.S., and B.A. Chouet (2010), Subevents of long-period seismicity: Implications for hydrothermal dynamics during the 2004-2008 eruption of Mount St. Helens, J. Geophys. Res., 115, B12206, doi:10.1029/2010JB007839 (link)

[06] Matoza, R.S., D. Fee, and M.A. Garces (2010), Infrasonic tremor wavefield of the Pu`u O`o crater complex and lava tube system, Hawaii, in April 2007, J. Geophys. Res., 115, B12312, doi:10.1029/2009JB007192 (link)

[05] Matoza, R.S., M.A. Garces, B.A. Chouet, L. D'Auria, M.A.H. Hedlin, C. De Groot-Hedlin, and G.P. Waite (2009), The source of infrasound associated with long-period events at Mount St. Helens, J. Geophys. Res., 114, B04305, doi:10.1029/2008JB006128 (link)

[04] Matoza, R.S., D. Fee, M.A. Garces, J.M. Seiner, P.A. Ramon, and M.A.H. Hedlin (2009), Infrasonic jet noise from volcanic eruptions, Geophys. Res. Lett., 36, L08303, doi:10.1029/2008GL036486 (link)

[03] Garces, M., D. Fee, D. McCormack, R. Servranckx, H. Bass, C. Hetzer, M. Hedlin, R. Matoza, H. Yepes, and P. Ramon (2008), Capturing the Acoustic Fingerprint of Stratospheric Ash Injection, EOS Trans. AGU (article), 89 (40), p377-379, doi:10.1029/2008EO400001 (link)

[02] Moran, S.C., R.S. Matoza, M.A. Garces, M.A.H. Hedlin, D. Bowers, W.E. Scott, D.R. Sherrod, and J.W. Vallance (2008), Seismic and acoustic recordings of an unusually large rockfall at Mount St. Helens, Washington, Geophys. Res. Lett., 35, L19302, doi:10.1029/2008GL035176 (link)

[01] Matoza, R.S., M.A.H. Hedlin, and M.A. Garces (2007), An Infrasound Array Study of Mount St. Helens, J. Volcanol. Geotherm. Res., 160, 249-262, doi:10.1016/j.jvolgeores.2006.10.006 (link)

Last updated August 2020

Other works

[07] Matoza, R.S. (2020), Seismicity from the deep magma system, Science, 368 (6492), 708-709, doi:10.1126/science.abc2452

[06] Krishnamoorthy, S., A. Komjathy, J.A. Cutts, P. Lognonné, R.F. Garcia, M.P. Panning, P.K. Byrne, R.S. Matoza, A.D. Jolly, J.B. Snively, S. Lebonnois, D.C. Bowman, E.F. Young (2020), Seismology on Venus with infrasound observations from balloon and orbit, White Paper for NASA 2021 Decadal Survey, doi:10.2172/1603861

[05] Lysenko, E.J., T.B. Neilsen, and R.S. Matoza (2019), A prototype soundproof box for isolating ground-air seismo-acoustic signals, Proc. Mtgs. Acoust., 36:1, 045002, doi:10.1121/2.0001034

[04] Matoza, R.S. and D. Fee (2018), The inaudible rumble of volcanic eruptions, Acoustics Today, 14:1, 17-25, Spring 2018 

[03] Matoza, R.S., P.M. Shearer, P.G. Okubo, B. Chouet, P. Dawson, and S. Moran (2015), Systematic mining and reanalysis of large volcano-seismic waveform datasets, Near-Surface Asia Pacific Conference, Waikoloa, Hawaii, 7-10 July 2015, pp. 498-501, doi:10.1190/nsapc2015-133

[02] Farges, T., C. Millet, and R.S. Matoza (2012), Infrasound from lightning measured in Ivory Coast, Proc. 1st TEA–IS Summer School, 90-91 

[01] Le Pichon, A., R. Matoza, N. Brachet, and Y. Cansi (2010), Recent Enhancements of the PMCC Infrasound Signal Detector, Inframatics, September 2010 issue

Last updated August 2020


EARTH 11: Volcanoes and Humans

EARTH 20: Geological Catastrophes 

EARTH 136, 236: Geophysics (Seismology)

EARTH 131, 231: Geophysical Time-Series Analysis 

EARTH 232: Introduction to Computing for Earth Science

EARTH 254: Advanced Seismology Seminar