Publications

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CV


Ethan F. Williams

Ph.D. Candidate in Geophysics
Seismological Laboratory
California Institute of Technology
Office:
    358 South Mudd
Mail:
    MS 252-21
    1200 E. California Blvd.
    Pasadena, CA 91125
Email:
    efwillia@gps.caltech.edu
Google Scholar

Journal Articles:

  • Wang, X., Williams, E.F., Karrenbach, M., Gonzalez-Herraez, M., Martins, H.F., and Zhan, Z. (2020) Rose Parade seismology: Signatures of floats and bands on optical fiber. Seismological Research Letters 91, pp. 2395-2398. [link]
  • Fernandez-Ruiz, M.R., Soto, M.A., Williams, E.F., Martin-Lopez, S., Zhan, Z., Gonzalez-Herraez, M., and Martins, H.F. (2020) Distributed acoustic sensing for seismic activity monitoring. APL Photonics 5 (3), 030901. [link]
  • Williams, E.F., Fernandez-Ruiz, M.R., Magalhaes, R., Vanthillo, R., Zhan, Z., Gonzalez-Herraez, M., and Martins, H.F. (2019) Distributed sensing of microseisms and teleseisms with submarine dark fibers. Nature Communications 10, 5778. [link] [EarthArXiv]
  • Gurnis, M., Van Avendonk, H., Gulick, S.P.S., Stock, J.M., Sutherland, R., Hightower, E., Shuck, B., Patel, J., Williams, E.F., Kardell, D., Herzig, E., Idini, B., Graham, K., Estep, J., and Carrington, L. (2019) Incipient subduction at the contact with stretched continental crust: the Puysegur Trench. Earth and Planetary Science Letters 520, pp. 212-219. [link]
  • Williams, E.F., Castillo, C.M., Klemperer, S.L., Raineault, N., and Gee, L. (2018) Sycamore Knoll: A wave-planed pop-up structure in a sinistral-oblique thrust system, Southern California Continental Borderland. Deep Sea Research, Part II: Topical Studies in Oceanography 150, pp. 132-145. [link]

Expanded Abstracts:

  • Fernandez-Ruiz, M.R., Williams, E.F., Magalhaes, R., Vanthillo, R., Costa, L., Zhan, Z., Martin-Lopez, S., Gonzalez-Herraez, M., and Martins, H.F. (2019) Teleseism monitoring using chirped-pulse ΦOTDR. Seventh European Workshop on Optical Fibre Sensors 1119921. [link]
  • Martins, H.F., Fernandez-Ruiz, M.R., Costa, L., Williams, E.F., Zhan, Z., Martin-Lopez, S., and Gonzalez-Herraez, M. (2019) Monitoring of remote seismic events in metropolitan area fibers using distributed acoustic sensing (DAS) and spatiotemporal signal processing. Optical Fiber Communication Conference M2J.1. [link]

Non-refereed Publications:

  • Williams, E.F. and Martin, E.R. (2016) Detection and removal of coherent anthropogenic noise from passive seismic data. SEP Report 165, pp. 153-164.

Talks and Posters:

  • Williams, E.F., Zhan, Z., Lambert, V., and Zhang, Y. (2019) Time-lapse shear-wave velocity profiling in urban pasadena with a fiber seismic network. Talk, AGU Fall Meeting, December 2019.
  • Robo, E.T., Labedz, C.R., Williams, E.F., Klesh, A., Panning, M.P., Marandi, A., and Zhan, Z. (2019) DAS on Ice: insights gained from deploying several kilometers of fiber optic cable on Taku Glacier, Alaska. Poster, AGU Fall Meetings, December 2019.
  • Li, Z., Zhan, Z., Williams, E.F., and Klesh, A. (2019) Monitoring aftershocks of the 2019 Ridgecrest earthquakes with DAS arrays. Poster, AGU Fall Meeting, December 2019.
  • Williams, E.F., Zhan, Z., Li, Z., Karrenbach, M., Coleman, T., Klesh, A., Cole, S., LaFlame, L., and Yartsev, V. (2019) Aftershocks of the Ridgecrest earthquake sequence on four dense fiber seismic arrays. Poster, SCEC Annual Meeting, September 2019.
  • Zhang, Y., Williams, E.F., Lambert, V.R., and Zhan, Z. (2019) Updating the Caltech Millikan Shaker for time-lapse seismic imaging in Southern California. Poster, SCEC Annual Meeting, September 2019.
  • Williams, E.F., Fernandez-Ruiz, M.R., Martins, H.F., Zhan, Z., Gonzalez-Herraez, M., Vanthillo, R., and Magalhaes, R. (2019) Teleseisms and microseism generation observed by an ocean-bottom distributed acoustic sensing array offshore Belgium. Talk, SSA Annual Meeting, April 2019.
  • Williams, E.F., Zhan, Z., Karrenbach, M., Cole, S., LaFlame, L., Martins, H.F., and Gonzalez-Herraez, M. (2019) High-resolution mapping and monitoring of shallow shear-wave velocity in urban Pasadena with Distributed Acoustic Sensing Poster, SSA Annual Meeting, April 2019.
  • Williams, E.F., Zhan, Z., Karrenbach, M., Cole, S., and LaFlame, L. (2018) Dense mapping of shallow velocity structure in the Raymond Basin using the Pasadena Distributed Acoustic Sensing Array. Poster, SCEC Annual Meeting, September 2018.
  • Williams, E.F., Castillo, C.M., Klemperer, S.L., Raineault, N., and Gee, L. (2017) A new estimate of latest Quaternary slip on the Anacapa-Dume Fault at Sycamore Knoll, Southern California Continental Borderland. Poster, SCEC Annual Meeting, September 2017.
  • Williams, E.F., Martin, E.R., Biondi, B., Lindsey, N.J., Ajo-Franklin, J.B., Wagner, A.M., Bjella, K.L., Daley, T.M., Dou, S., Freifeld, B.M., Robertson, M., and Ulrich, C. (2016) Quality of Green's functions improved by automatic detection and removal of coherent anthropogenic noise. Poster, AGU Fall Meeting, December 2016.
  • Castillo, C.M., Klemperer, S.L., Williams, E.F., Legg, M.R., and Francis, R.D. (2015) Tsunamogenic landslides and marine paleoseismology: applications of the submerged marine terrace record, Santa Catalina Island, Southern California Borderland. Talk, AGU Fall Meeting, December 2015.
  • Williams, E.F., Castillo, C.M., Klemperer, S.L., Maher, K.M., Francis, R.D., and Legg, M.R. (2015) Preliminary results of marine paleoseismology from MCS, CHIRP, and coring off Catalina Island. Poster, SCEC Annual Meeting, September 2015.