Volkan Sevilgen, M.Sc. — cofounder and CTO
Volkan leads Temblor’s scientific programming and technology development. He received an M.Sc. in Geophysics from Istanbul Technical University in 2006, and then worked at the USGS with Ross until 2014, where he helped to develop and teach the Coulomb 3.0 earthquake stress and deformation software, and also managed a four-year probabilistic seismic hazard assessment for the Balkan countries funded by USAID’s Office of Foreign Disaster Assistance. Sevilgen’s 2012 study, ‘Stress imparted by the great 2004 Sumatra earthquake shut down transforms and activated rifts up to 400 km away in the Andaman Sea,’ appeared in the Proceedings of the National Academy of Sciences.


Ross S. Stein, Ph.D.cofounder and CEO
Ross is Consulting Professor of Geophysics at Stanford University, Scientist Emeritus at the U.S. Geological Survey, and President-Elect of the Tectonophysics section of the American Geophysical Union (AGU). He is a Fellow of the AGU and the Geological Society of America. In 2012, Ross received the Gilbert F. White Natural Hazards Award from AGU, and gave a TEDx talk, ‘Defeating Earthquakes.’ He received an Sc.B. from Brown University magna cum laude and with honors, and a Ph.D. from Stanford University. In 2009, Ross cofounded the Global Earthquake Model (GEM), a public-private partnership building a seismic risk model for the world.

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.


Betsy Madden


Elizabeth H. Madden, Ph.D.Seismic Research & Development
Betsy combines geological and geophysical data, field work, and numerical modeling to understand fault structures and seismic hazards. Her published research focuses on fault energy budgets, fracture growth, 3D fault structure and behavior, tectonic stress magnitudes and orientations in the Earth, and how the shape of Earth’s surface affects ground motions. Much of her work is directed at mitigating seismic hazard. Betsy received her PhD from Stanford University in 2012, and was a Post-Doctoral Fellow at the University of Massachusetts at Amherst in 2013-2015. Before entering graduate school, Betsy worked at American Red Cross in International Services.


Alexandra Kim
Developer & Researcher
Ali is building Temblor’s GIS mapping capabilities, conducting insurance research, and leading our website design. She is a junior at Brown University, double majoring in Applied Math-Computer Science and Geochemistry. She is a National AP Scholar, and received high school department awards in Science (Chemistry) and Mathematics (Statistics). Ali is also a defender on Division I Women’s Lacrosse team at Brown, a skydiver, and rock climber.



David Jacobson, M.Sc.Researcher
David has a M.Sc. in Geology from the University of Canterbury, in Christchurch, New Zealand. Christchurch has become the world epicenter for the consequences of liquefaction, making David the perfect person to scour the United States for liquefaction, landslide, and fault data for the Temblor app. His GIS and field geology skills only increase his value to the team. David received Academic Distinction and the Albert Ripley Leeds Memorial Prize in Geology at Whitman College, where he received his B.A., and he is a recipient of an Earthquake Commission Scholarship and a Mason Trust Scholarship at the University of Canterbury. David is an avid ultimate frisbee player and was a two-time national champion while in New Zealand.


Gabriel Lotto, MS Tsunami and Flood R&D
Gabriel received his MS in Computational and Mathematical Engineering from Stanford University 2013; his thesis was published as Lotto and Dunham (2015), “High-order finite difference modeling of tsunami generation in a compressible ocean from offshore earthquakes.” He is now a PhD candidate in Geophysics at Stanford, where his research focuses on coupled modeling of earthquakes and tsunamis. Gabriel is also cofounder of Fog City Singers, a barbershop chorus based in San Francisco, and sings in a competitive barbershop quartet.