Haruo Sato is Professor Emeritus at Tohoku University, Japan. He is an expert in observation and theoretical physics in seismology and solid Earth geophysics. He was awarded with the 2018 Beno-Gutenberg Medal by the European Geosciences Union (EGU) for outstanding contributions to seismology and the development of new insights into stochastic properties of Earth structure through theoretical and observational studies of scattered seismic waves. He was also made a Japan Geoscience Union fellow in 2018 and was elected to be an honorary member of the Seismological Society of Japan in 2019. Kentaro Emoto is an Associate Professor at the Institute of Seismology and Volcanology at Kyushu University in Japan, where he works in observation and numerical simulation in seismology. He was previously an Assistant Professor in the Department of Geophysics at Tohoku University.