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Jefferson C Chang, Ph.D.

Jefferson is a Geophysicist with the U.S. Geological Survey—Volcano Hazard Programs, at the Volcano Science Center's Hawaiian Volcano Observatory.


  • Ph.D. in Geophysics: University of Oklahoma (2017)
  • M.S. in Geology: University of Texas at El Paso (2008)
  • B.S. in Geology: Northern Arizona University (2005)
  • A.A. in Liberal Arts: University of Hawaii—Leeward Community College (2001)


  • Geophysicist: USGS Hawaiian Volcano Observatory (2018-present)
  • Geophysical Operations Manager: Oklahoma Geological Survey (2016-2018)
  • State Seismologist (Interim): Oklahoma Geological Survey (2015-2016)
  • Research Associate: Oklahoma Geological Survey (2014-2015)
  • Field Technician: University of Oklahoma (2008-2012)
  • GIS Analyst: UTEP Regional Geospatial Service Center (2007)
  • Digital Cartographer: Northern Arizona University (2005)
  • Seismic Technician/Analyst: Arizona Earthquake Information Center (2005)