Penn State - Earthquake Seismology

Charles J. Ammon
Professor of Geosciences


Department of Geosciences
440 Deike Building
University Park, PA 16870


Voice: (814) 865-2310 / FAX: (814) 863-7823
charlesammon@psu.edu

Research Interests [More Details]

My research is focused on the use of seismograms to better image earth structure and earthquake ruptures. My current research projects include the combination of receiver functions, surface-wave dispersion, and gravity observations to improve estimates of lithospheric structure (working with current student Chengping Chai, Monica Maceira, of Los Alamos, and Bob Herrmann of Saint Louis University). I am also working with current PhD student Jonas Kintner, and former Ph.D. student Mike Cleveland (now at Los Alamos National Laboratory) to develop methods to exploit seismic surface waves to improve earthquake locations in remote regions. Finally, I have ongoing work in tomographic imaging of earthquakes and earth structure with researchers from other institutions. (Last updated in August 2015)

Current Students [Complete List]

  Chengping Chai Ph.D. Seismic Imaging of the Lithosphere.
  Jonas Kintner Ph.D. Earthquake processes.
  Audrey Dunham B. Sc. Surface-Wave Earthquake Relocation
  Quentin Sedoux B. Sc. Earth Structure Beneath Turkey

Recent Publications [Complete List]

Cleveland, K. M. and C. J. Ammon, Precise relative earthquake locations and magnitudes of seismicity in the northeast Pacific, J. Geophys. Res., accepted, 2015.

Chai, Chengping, C. J. Ammon, M. Maceira, and R. B. Herrmann. 2015. Inverting interpolated receiver functions with surface wave dispersion and gravity: Application to the western U.S. And adjacent canada and mexico. Geophysical Research Letters 42doi:10.1002/2015GL063733, 2015.

Cleveland, K. M. and C. J. Ammon, Precise relative earthquake magnitudes from cross correlation, Bull. Seism. Soc. Am., 105, 1792-1796, doi: 10.1785/0120140329, 2015.

Cleveland, K. M., C. J. Ammon, and T. Lay, Large earthquake processes in the northern Vanuatu subduction zone, J. Geophys. Res. Solid Earth, 119, doi:10.1002/2014JB011289, 2014.

B. Voight, R. S. J. Sparks, E. Shalev, T. Minshull, M. Paulatto, C. Annen, C. Kenedi, J. Hammond, T. J. Henstock, L. Brown, E. Kiddle, P. Malin, G. Mattioli, C. Ammon, E. Arias-Dotson, A. Belousov, K. Byerly, L. Carothers, A. Clarke, S. Dean, L. Ellett, D. Elsworth, D. Hidayat, R. A. Herd, M. Johnson, A. Lee, V. Miller, B. Murphy, C. Peirce, G. Ryan, S. Saldana, C. Snelson, R. Stewart, R. Syers, J. Taron, J. Trofimovs, C. Widiwijayanti, S. R. Young, and W. Zamora, Chapter 15 of The SEA-CALIPSO volcano imaging experiment at Montserrat: plans, campaigns at sea and on land, scientific results, and lessons learned, Geological Society, London, Memoirs, 39:253-289, doi:10.1144/M39.15, 2014.

Cleveland, M. and Ammon, C. J., Precise relative earthquake relocation using surface waves, J. Geophys. Res., 18, 1-12, doi:10.1002/jgrb.50146, 2013.

Lay, T., Kanamori, H., Ammon, C. J., Koper, K., Hutko, A., Ye, L., Yue, H., Rushing, T. M., Depth-varying rupture properties of subduction zone megathrust faults, J. Geophys. Res. 117, 2012, http://dx.doi.org/10.1029/2011JB009133.

Herrmann, R. B., H. Benz, and C. J. Ammon, Monitoring the Earthquake Source Process in North America, Bull. Seism. Soc. Am., 101, 2609-2625, doi: 10.1785/0120110095, 2011.

Ammon, C. J., T. Lay, H. Kanamori, and M. Cleveland, A rupture model of the 2011 off the Pacific coast of Tohoku Earthquake, Earth Planets and Space, 63, 693-696, 2011.

Koper, K. D., A. R. Hutko, T. Lay, C. J. Ammon, and H. Kanamori, Frequency-dependent rupture process of the 2011 M(w) 9.0 Tohoku Earthquake: Comparison of short-period P wave back projection images and broadband seismic rupture models, Earth Planets and Space, 63, 599-602, 2011.

Lay, T., C. J. Ammon, H. Kanamori, M. J. Kim, and L. Xue, Outer trench-slope faulting and the 2011 M(w) 9.0 off the Pacific coast of Tohoku Earthquake, Earth Planets and Space, 63, 713-718, 2011.

Lay, T., C. J. Ammon, H. Kanamori, L. Xue, and M. J. Kim, Possible large near-trench slip during the 2011 M(w) 9.0 off the Pacific coast of Tohoku Earthquake, Earth Planets and Space, 63, 687-692, 2011.

Lay, T., Y. Yamazaki, C. J. Ammon, K. F. Cheung, and H. Kanamori, The 2011 M(w) 9.0 off the Pacific coast of Tohoku Earthquake: Comparison of deep-water tsunami signals with finite-fault rupture model predictions, Earth Planets and Space, 63, 797-801, 2011.

Lay, T., C. J. Ammon, H. Kanamori, Y. Yamazaki, K. F. Cheung, and A. R. Hutko, The 25 October 2010 Mentawai tsunami earthquake (M(w) 7.8) and the tsunami hazard presented by shallow megathrust ruptures, Geophysical Research Letters, 38, 2011.

Ammon, C. J., T. Lay, and D. Simpson, Great Earthquakes and Global Seismic Networks, Seismol. Res. Letters, 81 (6) pp. 965-971, 2010.

Lay, T., C. J. Ammon, H. Kanamori, L. Rivera, K. Koper, A. Hutko, The 2009 Samoa-Tonga great earthquake triggered doublet, The 2009 Samoa-Tonga great earthquake triggered doublet, Nature 466, 964968, doi:10.1038/nature09214.

Lay, T., C. J. Ammon, H. Kanamori, K. D. Koper, O. Sufri, and A. R. Hutko, Teleseismic inversion for rupture process of the 27 February 2010 Chile (Mw 8.8) earthquake, Geophys. Res. Lett., 37, L13301, doi:10.1029/2010GL043379, 2010.


Penn State Earthquake Seismology

Department of Geosciences

Last Updated:28 May, 2013