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Caltech
Division of Geological and Planetary Sciences
Prabha R. Acharya
Software Systems Developer
Mateo A. Acosta
Scientific Researcher
Geology; 
Jess F. Adkins
Smits Family Professor of Geochemistry and Global Environmental Science
Environmental Science and Engineering;  Geochemistry; 
Piyush S. Agram
Visitor in Geophysics
Geophysics; 
Isaac Aguilar Rivera
Graduate Student
Geobiology; 
Thomas J. Ahrens
In Memoriam
Alexander B. Akins
Visitor in Planetary Science
Planetary Science; 
Arden L. Albee
Professor of Geology and Planetary Science, Emeritus
Geology;  Planetary Science; 
Olivia Alcabes
Graduate Student
Environmental Science and Engineering; 
Abdulrahman Aljurbua
Postdoctoral Scholar Fellowship Trainee in Planetary Science
Planetary Science; 
Clarence Allen
In Memoriam; Acting Chairman, Division of Geology, 1967-68.
Thamer (Thamer Aldaajani) Alotaibi
Visitor in Geophysics
Geophysics; 
Hussain A. Alqattan
Graduate Student
Geology; 
Grecia (Grace) Ames
Division Enrichment Coordinator
Josh Anadu
Graduate Student
Geobiology; 
Don L. Anderson
In Memoriam
Nicolas Anderson
Graduate Student
Geology; 
Simon Andren
Graduate Student
Geochemistry; 
Andrew M. Annex
Visitor in Planetary Science
Planetary Science; 
Solene Antoine
Postdoctoral Scholar Research Associate in Geology
Geology; 
Paula (Smith) Antoshechkin
Senior Research Scientist
Geochemistry;  Geology; 
Lupe Arellano
Administrative Assistant
Paul D. Asimow
Eleanor and John R. McMillan Professor of Geology and Geochemistry
Geochemistry;  Geology; 
James W. Atterholt
Non-Degree Student
Jean-Philippe Avouac
Earle C. Anthony Professor of Geology and Mechanical and Civil Engineering; Associate Director, Center for Autonomous Systems and Technologies
Geology;  Geophysics; 
Amirhossein Bagheri
Postdoctoral Scholar Fellowship Trainee in Geophysics
Geophysics; 
Yue (Luna) Bai
Graduate Student
Environmental Science and Engineering; 
Michael B. Baker
Senior Research Scientist
Geochemistry;  Geology; 
Samantha R. Baker
Graduate Student
Planetary Science; 
Kimberly Baker-Gatchalian
Operations & Fiscal Manager
Geophysics; 
Abdalla Bakri
Postdoctoral Scholar Fellowship Trainee in Geology
Geology; 
Haroula Baliaka
Graduate Student
Environmental Science and Engineering; 
Yinon Bar-On
Postdoctoral Scholar Fellowship Trainee in Geobiology
Geobiology; 
Holly Barnhart
Graduate Student
Geochemistry; 
Stuart J. Bartlett
Research Staff
Planetary Science; 
Konstantin Batygin
Professor of Planetary Science
Planetary Science; 
John Beckett
Senior Research Scientist
Amanda L. Bednarick
Graduate Student
Geochemistry; 
Matthew Belyakov
Graduate Student
Planetary Science; 
Jordan T. Benjamin
Graduate Student
Environmental Science and Engineering; 
Jonathan Bennett
Undergraduate
Geology; 
Alexander C. Berne
Graduate Student
Geophysics; 
Makayla N. Betts
Graduate Student
Geobiology; 
Rayomand (Rayo) Bhadha
Seismic Network Technical Manager
Aparna Bhaskaran
Senior Software Developer
Surjyendu Bhattacharjee
Graduate Student
Geochemistry; 
Narayanarao Bhogapurapu
Visitor in Planetary Science
Planetary Science; 
Ettore Biondi
DAS Scientist
Geophysics;