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Sean Kamran Ahdi

I am a Research Geophysicist with a background in geotechnical earthquake engineering and engineering geology. My research focuses on using data from near-surface geophysical methods for seismic site characterization. This information is used to estimate earthquake site response and ground motions, models of which are applied in the development of the USGS National Seismic Hazard Mapping Project.

Education

Ph.D., UCLA, 2018, Civil Engineering (Geotechnical Earthquake Engineering)
M.S., UCLA, 2014, Civil Engineering (Geotechnical Earthquake Engineering)
B.S., UCLA, 2013, Civil Engineering
B.S., UCLA, 2013, Geology/Engineering Geology

Publications

Google Scholar

Science and Products

Horizontal-to-vertical spectral ratios from California sites: Open-source database and data interpretation to establish site parameters

Frequency-dependent horizontal-to-vertical spectral ratios (HVSR) of Fourier amplitudes from three-component recordings can provide information on one or more site resonant frequencies and relative levels of amplification at those frequencies. Such information is potentially useful for predicting site amplification but is not present in site databases that have been developed over the last 15–20 y
By
Natural Hazards, Earthquake Hazards, Earthquake Science Center

Science and Products