Geologist George Plafker passed away on April 2, 2026, at the age of 97. Introduction George Plafker was an American geologist and seismologist who gained international recognition through his research on earthquakes, tsunamis, and the geology of Alaska. His name is especially associated with the scientific understanding of subduction zones and the largest earthquakes at convergent plate boundaries. Due to this influence, his death is also noted outside the geological community. Career and Achievements Plafker was born on March 6, 1929, in Upland, Pennsylvania, United States. He spent his entire career working for the United States Geological Survey, where he became a leading researcher in seismology and geology. His career coincided with a period of significant change in earth sciences, driven by the rise of plate tectonics theory. Through fieldwork, analysis of seismic data, and geological modeling, he made important contributions to this new scientific framework. He conducted groundbreaking research on subduction and how these processes can cause large earthquakes and tsunamis. His investigation of the 1964 Alaska earthquake led to the conclusion that the largest quakes result from fault slip at convergent boundaries. This work became crucial for the modern understanding of megathrust earthquakes, very powerful quakes that occur where tectonic plates collide. He carried out fieldwork in several seismically active regions, including Alaska, Ecuador, Peru, and Chile. During his career, he published more than 150 scientific articles and reports. The significance of his work extended beyond academia. His insights helped form the basis for modern research into seismic risks and tsunami warnings, especially in countries surrounding the Pacific Ocean. In 2017, Plafker received two major honors for his scientific contributions: the Penrose Medal from the Geological Society of America and the Harry Fielding Reid Medal from the Seismological Society of America. Private Life Little is publicly known about George Plafker’s private life. It is known that he held American nationality and was born in Upland, Pennsylvania. Death George Plafker died on April 2, 2026, at the age of 97. The place of death has not been publicly confirmed. No public information has been released regarding the cause of death. His passing marks the end of a long career in which he had a lasting impact on geology and seismology. Conclusion With the death of George Plafker, geology and seismology lose an influential pioneer. His research on subduction zones, tsunamis, and major earthquakes has shaped the field permanently and remains relevant to current research. More notable scientists who have passed away can be found on Overleden.net. This article was created with the support of AI tools and verified by the editorial team of Overleden.net.