Jon B. Fletcher

U.S. Geological Survey, USA


Jon B. Fletcher was born in 1946. He graduated with a B.A. degree in geology in 1968, Macalester College, St. Paul, MN, USA, and obtained his Ph.D. degree in geophysics in 1976, Columbia University, New York, NY, USA. Fletcher was hired at the US Geological Survey out of graduate school on a National Research Council Fellowship. He has worked at the USGS since then. His interests lie in analyzing strong ground motion records for path or source properties. He first worked on analyzing records from the Oroville earthquake and then helped build the Anza array with Frank Vernon and Jon Berger at US San Diego. From there he worked on analyzing path affects from records of the Loma Prieta earthquake and started the Parkfield Project at about the same time. The array records from Parkfield provided important insight into the rupture process of the 2004 mainshock and nonvolcanic tremor. More recently, he has deployed an array in the Sacramento/San Joaquin Delta for analyzing site response at levees in the Delta and for an ambient noise tomographic study. Following are some of his publications: (1) Fletcher, J.B., P. Spudich, and L.M. Baker (2007), Errata, "Rupture propagation of the 2004 Parkfield, California, earthquake from observations at UPSAR array," Bulletin of the Seismological Society of America, 97, 355; (2) Fletcher, J.B. and L. M. Baker (2010) "Analysis of nonvolcanic tremor on the San Andreas fault near Parkfield, CA using U. S. Geological Survey Parkfield Seismic Array," Journal of Geophysical Research, 115, B10305, doi:10.1029/2010JB007511; (3) Fletcher, J.B. and A. McGarr (2011), "Moments, magnitudes, and radiated energies of non-volcanic tremor near Cholame, CA, from ground motion spectra at UPSAR," Geophysical Research Letters, 38, L16314, doi:10.1029/2011GL048636.

Biography Updated on 4 February 2013

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