Kerry Sieh

Kerry Sieh. He is an American geologist renowned for pioneering the field of paleoseismology, the study of prehistoric earthquakes. His meticulous fieldwork on the San Andreas Fault in California and later on the Sunda Megathrust in Sumatra has fundamentally reshaped understanding of earthquake cycles and hazards. Sieh's career has spanned prestigious appointments at the California Institute of Technology and leadership roles at the Earth Observatory of Singapore, where his research continues to inform seismic risk assessment for vulnerable coastal communities across Southeast Asia.

Early life and education

Kerry Sieh was born on December 24, 1948, in the United States. He pursued his undergraduate studies in geology at the University of California, Riverside, where he developed a foundational interest in earth processes. He then earned his Ph.D. from Stanford University in 1978, conducting dissertation research that would lay the groundwork for his future investigations into fault behavior. His early academic training under the guidance of prominent figures in geology and geophysics equipped him with the skills for detailed field observation and stratigraphic analysis.

Career and research

Following his doctorate, Sieh joined the faculty at the California Institute of Technology, where he established a long and influential career. His research initially focused on the San Andreas Fault, employing innovative trenching techniques to expose its history. In the 2000s, his work expanded globally, leading him to study the massive subduction zone system of the Sunda Megathrust following the catastrophic 2004 Indian Ocean earthquake and tsunami. He later served as the founding director of the Earth Observatory of Singapore at Nanyang Technological University, building a major research hub focused on natural hazards in Asia.

Major contributions to paleoseismology

Sieh's most celebrated contribution is his detailed paleoseismic history of the San Andreas Fault at Pallett Creek. By meticulously dating sediment layers offset by past ruptures, he provided the first robust evidence for recurring large earthquakes on a centuries-long cycle, revolutionizing the field. In Indonesia, his team documented the history of great earthquakes along the Sunda Megathrust by studying coral microatolls, which record changes in sea level. This work was critical in identifying the potential for future tsunamis following the 2004 Indian Ocean earthquake and tsunami and the 2005 Nias–Simeulue earthquake.

Awards and honors

In recognition of his transformative research, Kerry Sieh has received numerous prestigious awards. He is a recipient of the G. K. Gilbert Award from the Geological Society of America, one of the highest honors in the field of geomorphology. The American Geophysical Union awarded him the Bucher Medal for his contributions to the study of the Earth's crust. He has also been elected a fellow of the American Academy of Arts and Sciences and the American Geophysical Union, acknowledging his sustained impact on the earth sciences.

Selected publications

* Sieh, K.E. (1978). Slip along the San Andreas fault associated with the great 1857 earthquake. *Bulletin of the Seismological Society of America*. * Sieh, K.E., et al. (1989). A more precise chronology of earthquakes produced by the San Andreas fault in southern California. *Journal of Geophysical Research*. * Sieh, K., et al. (2008). Earthquake supercycles inferred from sea-level changes recorded in the corals of west Sumatra. *Science*. * Philibosian, B., & Sieh, K. (2013). Paleoseismology of the Sumatran subduction zone: A comprehensive record of giant earthquakes over the past millennium. *Geological Society of America Bulletin*.

Category:American geologists Category:1948 births Category:Living people Category:Paleoseismologists Category:California Institute of Technology faculty Category:Nanyang Technological University faculty