应我校“深部探测与成像全国重点实验室”和“陆内火山与地震”教育部重点实验室江国明教授邀请，新加坡南洋理工大学Giuseppe Petrillo博士将于12月23日线上学术报告。
时 间：2025年12月23日14:30-16:00
腾讯会议号：544-817-801
报告题目：
Earthquakes as Emergent Phenomena: Insights from the Physics of Complex Systems
报告内容摘要：
Earthquake activity emerges from the collective dynamics of the Earth’s crust, a complex system in which interacting fault segments, stress loading, and rupture processes generate robust statistical patterns such as the Gutenberg-Richter and Omori laws. Inspired by statistical mechanics, simplified yet physically grounded models provide a powerful framework to connect these macroscopic regularities to the underlying stress dynamics.
In this seminar, I discuss a research approach that integrates concepts from complex systems physics and statistical seismology to explore earthquake clustering, stress redistribution, and recurrence. Using a two-layer Olami-Feder-Christensen (OFC) type model that incorporates brittle-ductile coupling, we reproduce key empirical seismic laws and systematically test physical hypotheses on earthquake triggering. The model reveals that large events tend to nucleate near the edges of previous ruptures, where stress is preferentially concentrated, while stress relaxation within the rupture area limits the size of subsequent events and carries information on recurrence times.
By combining numerical simulations with statistical analysis and physical interpretation, this work illustrates how minimal, physics-informed models can act as controlled laboratories to investigate earthquake interactions and ultimately contribute to improved seismic hazard assessment.
报告人简介：
Giuseppe Petrillo is a researcher currently affiliated with the Earth Observatory of Singapore at Nanyang Technological University. His research interests are Statistical Mechanics, Statistical Seismology, Stochastic Modeling and Disordered Systems. He has extensive experience with epidemic-type models of seismicity (ETAS and its nonstationary extensions), physics-based minimal models, and probabilistic approaches to earthquake forecasting. His research spans natural, induced, and volcanic seismicity, with applications to several regions worldwide. Beyond observational studies, he develops numerical and theoretical models to explore how stress redistribution and fault interactions give rise to emergent seismic laws. He is also active in editorial and peer-review activities for international geophysics journals and regularly collaborates across physics and Earth science communities.
欢迎感兴趣的师生参加！
深部探测与成像全国重点实验室
陆内火山与地震教育部重点实验室
地球物理与信息技术学院
2025-12-22
