Volkan Sevilgen, M.Sc. — cofounder and CTO
Volkan Sevilgen, CTO and cofounder, leads Temblor’s scientific programming and technology development. Volkan received an M.Sc. in Geophysical Engineering from Istanbul Technical University (ITU) in 2006 following a B.Sc. from ITU in 2003. He worked at the USGS, Menlo Park between 2006 – 2014, where he co-authored, developed and taught the Coulomb 3 earthquake stress and deformation software, and managed a four-year probabilistic seismic hazard assessment for the Balkan countries funded by USAID’s Office of Foreign Disaster Assistance. His studies on earthquake hazard and Coulomb stress interaction were published by Nature, the Proceedings of the National Academy of Sciences, and other distinguished geophysics and seismology journals. He is secretary and treasurer of the Northern California Chapter of the Earthquake Engineering Research Institute (EERI)


Ross S. Stein, Ph.D.cofounder and CEO
Ross S. Stein is Temblor CEO and cofounder, Adjunct Professor of Geophysics at Stanford University, USGS Scientist Emeritus, a 2019 Centennial Lecturer of the American Geophysical Union, and 2020 Distinguished Lecturer of the Seismological Society of America. A Fellow of the American Geophysical Union and Geological Society of America, Stein received the 2012 Gilbert F. White Natural Hazards Award from AGU, gave a 2012 TEDx talk, ‘Defeating Earthquakes,’ and received the 2000 Eugene M. Shoemaker Distinguished Achievement Award of the USGS. In 2003, the Science Citation Index reported that Stein was the second most cited author in earthquake science during the preceding decade; he was tenth most cited during 1900-2010. Stein frequently brings insights to the public media interviews, TEDx and public talks, and in IMAX and Discovery Channel films. In 2010, Stein cofounded the Global Earthquake Model (GEM Foundation), chairing its Science Board until 2015. Stein is a member of the Advisory Council on Catastrophes of Zurich Insurance.

Software Developer


Serkan SevilgenSoftware Developer
Serkan leads Temblor’s API, mobile app, web app, and browser extension development, and its backend server systems. He is a programmer for high-traffic web sites, e-commerce, social media, content management systems (CMS) and analytics. He is a former entrepreneur and worked for Turkey’s largest sports team conglomerates, digital agencies, e-commerce companies. Serkan is skilled in PHP, Python, Node.js, Javascript, R, MySQL, MongoDB, Redis, Memcached, Nginx, Apache, AWS, and Heroku. He studied Chemistry at Bogazici University and received a B.S. in Design from Yildiz Technical University in Istanbul.


Jen Schmidt, Ph.D.Editor and Director of Temblor News
Jen leads the Temblor News site, manages Temblor’s social media presence, and monitors its analytics. She received her Ph.D. in Earth Sciences from Lehigh University in 2018, served as Visiting Lecturer at Wellesley College and Visiting Assistant Professor at Bucknell University, and was awarded a 2020 N.S.F. Innovative Postdoctoral Entrepreneurial Research Fellowship with Temblor. Jen has published on landscape evolution and tectonics, and has carried out field work in Tibet, Tajikistan, India, and Norway.


Ely-Portrait zoom
Geoffrey Ely, Ph.D.Computational Seismologist
Geoff has a Ph.D. in Earth Sciences from U.C. San Diego, and has had Post-Doctoral Fellowships at USC and Argonne National Laboratory. He is a scientific software developer who has worked on earthquake rupture dynamics, wave propagation, and ground motion using numerical simulation via high-performance computing, with a keen eye for visualization. His skills include parallel-processing with message-passing and multi-threading, performance tuning in assembly language, numerical methods, signal processing, cartography and graphics programming.


Shinji Toda Temblor
Shinji Toda, Ph.D. — Geophysicist and Developer
Shinji is Professor of Earth Sciences at Tohoku University in the International Research Institute of Disaster Science (IRIDeS). Because of its unmatched monitoring networks and high quake rate, Japan is the world’s most important proving ground for seismic innovation and discoveries. Shinji is developing and testing tools with Temblor to capture the change in seismic hazard following large earthquakes.


Tiegan Hobbs Temblor
Tiegan E. Hobbs, Ph.D., MSCEDeveloper & Researcher
Tiegan is a Postdoctoral Researcher at Natural Resources Canada in Vancouver, B.C., assessing seismic risk in British Columbia. She received her Ph.D. in Geophysics and her M.Sc. in Civil Engineering in 2019 at the Georgia Institute of Technology. She has studied Coulomb stress transfer to probe earthquake interaction, shear wave splitting to study fault structures, and used seismic and geodetic data to investigate postseismic relaxation of megathrusts to understand the seismic cycle.


Alka Tripathy-Lang, Ph.D. — Writer/Researcher

Alka received her Ph.D. in Geosciences from Arizona State University in 2011. Her doctoral work focused on thermochronology, geochemistry and remote sensing in the western Himalaya of India. As a postdoc at the Berkeley Geochronology Center, she worked on projects involving the topographic evolution of places like Tibet, Yosemite Valley and the Grand Canyon. She then set out to pursue her passion for science writing and science communication.


Megan Sever Editor
For 13 years, Megan led EARTH, a monthly earth sciences newsmagazine published by the American Geosciences Institute, and is now principal of Gneiss Editing (www.gneissediting.com). She edits and orchestrates many of the Temblor Insight articles, and guides and mentors its writers and researchers in communicating to the public.


Andrew Castaldi Strategic Marketing
Andy is principal at ARC AdvisingGroup, and former Senior V.P. for Catastrophe Perils at Swiss Re, where he led modeling and accumulation management for the Americas for two decades. Andy provides Temblor with insights on a variety of complex problems surrounding the economic, regulatory, delivery, and political aspects of natural hazard insurance, reinsurance, and consumer resiliency.


Temblor Earthquake News Externs

Jeng Hann Chong
Jeng Hann Chong is pursuing a master’s in geophysics at Cal State University Northridge and is interested in science communication. He joined Temblor’s externship program in May 2020.
Julie Pierce Onos
Julie Pierce Onos is a freelance writer, consultant and Yale graduate who is interested in writing about how science and business impact our world. Twitter: @JuliePierceOnos. She joined Temblor’s externship program in spring 2020.
Shi En Kim
Shi En Kim leads a double life of a science writer and a graduate student in molecular engineering at the University of Chicago. She joined Temblor’s externship program in May 2020.
Miguel Neves
Miguel Neves is pursuing a Ph.D. in geophysics at the Georgia Institute of Technology and is interested in science communication. He joined Temblor’s externship program in June 2020. Twitter: @Waves2Miguel.

Former TEN Externs

Melanie Chan
Melanie Chan is a freelance science writer based in Los Angeles, California, and holds an MSc in Neuroscience. She joined Temblor’s externship program in June 2020.


Our Advisory Board

Dr. Richard AllenDirector, Berkeley Seismology Lab
Dr. Richard Allen

Chair of the Department of Earth & Planetary Science at U.C. Berkeley, and Director of the Berkeley Seismology Lab
Jeff EllisDirector of Codes and Compliance at Simpson Strong-Tie
Jeff Ellis

Director of Codes and Compliance at Simpson Strong-Tie
Dr. Lucy JonesFounder of the Dr. Lucy Jones Center for Science and Society
Dr. Lucy Jones

Dr. Lucy Jones Center for Science and Society, and Research Associate at the Seismological Laboratory of Caltech

Pascal KarsentiDirector, Research & Technology at Nephila Advisors
Pascal Karsenti

Director, Research & Technology at Nephila Advisors
Dr. Nicholas PinterDirector of the UC Davis Center for Watershed Sciences
Dr. Nicholas Pinter

Shlemon Chair in Applied Geosciences, and Associate Director of the Center for Watershed Sciences, University of California Davis
Barney SchaubleManaging Partner at Nephila Advisors
Barney Schauble

Managing Partner at Nephila Advisors