UNHAS Geophysics Students Explore the Physics Behind Seismic Waves with Professor from RWTH Aachen University
The Bachelor’s Program in Geophysics at Hasanuddin University (UNHAS) held a guest lecture titled Physics and Seismic Waves on Monday, May 11, 2026. The event, which took place at the Faculty of Mathematics and Natural Sciences (FMIPA), featured Prof. Stefan Roth, Professor of Physics at RWTH Aachen University.
During the lecture, Prof. Roth explained the connection between fundamental physics concepts and seismic waves, beginning with the one-dimensional wave equation and extending to the three-dimensional equations of elastodynamics. He demonstrated that the velocities of P-waves and S-waves are governed by the elastic properties of rocks, particularly stiffness (elastic modulus) and material density. The lecture also highlighted the links between seismology and modern physics, including general relativity, gravitational waves, and advanced detection technologies such as the Einstein Telescope.
Prof. Roth further discussed how understanding seismic noise is essential for the development of gravitational-wave detectors. He explained that subsurface geological conditions, sensor depth, and seismic isolation systems all play critical roles in determining instrument sensitivity. His presentation illustrated that geophysics contributes not only to natural resource exploration and disaster mitigation, but also to addressing some of the most fundamental questions in modern physics.
Saaduddin, Ph.D., Secretary of the Department of Geophysics at UNHAS, expressed his hope that the guest lecture would inspire students to strengthen their understanding of the fundamental physics principles that underpin geophysics. According to him, geophysics requires not only practical skills in instrument operation and data processing, but also a solid grasp of the physical principles governing Earth processes.
“Through this lecture, we hope students will realize that mastering fundamental physics is essential for gaining a deeper understanding of geophysical phenomena and for developing innovative solutions in the future,” he said.
One of the participants, Ananda Achmad Muzakky, a member of the 2024 cohort, said the lecture provided him with valuable new insights.
“The guest lecture with Prof. Stefan Roth was an extremely valuable learning experience. I gained a better understanding of the physical principles that explain the differences in P-wave and S-wave velocities based on material stiffness and density. In addition, I learned about gravitational force and gravitational gradient noise,” he said.
The guest lecture is expected to encourage students to deepen their interest in seismology, exploration geophysics, and Earth physics more broadly. It also reflects the commitment of the Bachelor’s Program in Geophysics at UNHAS to bringing international perspectives into the learning process and strengthening academic partnerships with leading universities around the world.