On December 8, 2021, Dr. Prinya Puttapiban, advisor to the Vice President of MUKA and faculty members from the Division of Geoscience organized the International Online Mahidol University Geoscience Seminar (2nd Day) with the objective of enhancing students’ learning skills in Geology and to create a network of international Geological education with foreign experts. There were students and those who were interested in attending an online seminar at the Co-working space on the 1st floor of the Lecture building. The seminar will be organized 3 times, this time was honored by Professor Dr. Toshiaki Tsunogae, Chair of the College of Geoscience,School of Life and Environmental Sciences, Affiliation: University of Tsukuba, Japan in the title “The U-Ph dating: Techniques and Application”