27. 10. 2020 Issue 70
Finding Slow Earthquakes Behave Similarly to Regular Earthquakes

The largest earthquake ever recorded lasted for only about ten minutes. But two decades ago, scientists discovered that faults, the surfaces where earthquakes occur, can slide past each other very slowly sometimes. The slow earthquake, occurs deep in the earth and releases energy at slow pace, can last for weeks or longer. Professor Tan Yen Joe of Earth System Science Programme recently analysed hundreds of thousands of weak tremors emanating from the San Andreas Fault in California and found that slow earthquakes behave similarly to regular earthquakes.

Professor Tan catalogued the slow-slip events that occurred between 2006 and 2016, and found that the weak tremors clusters follow a power-law spatial and temporal decay similar to earthquake aftershock sequences. These slow-slip events (SSEs) have smaller stress drop and rupture velocity, but follow similar magnitude-frequency, moment-area, and moment duration scaling as regular earthquakes. The study gives scientists a clearer picture of how cycles of energy buildup and release occur along faults, hoping to improve our ability to forecast earthquakes.
Further reading:
Tan, Y. J., & Marsan, D. (2020). Connecting a broad spectrum of transient slip on the San Andreas fault. Science Advances, 6(33), eabb2489. DOI: https://doi.org/10.1126/sciadv.abb2489

University Press Release

Back to Issue
Table of Contents
Professor CHOW Hei Man Kim – Big Data X Traditional Molecular Biology: Decoding Biological Signalling Network
Welcoming New Students
ZOOM Consultation by Science Student Academic Advisors
Mini Impact Symposium – From Research to Entrepreneurship
Virtual Information Day for Undergraduate Admissions 2020
Revealing Gravitational-Wave Signature of a First-Order Quantum Chromodynamics Phase
Finding Slow Earthquakes Behave Similarly to Regular Earthquakes
Discovering the Biggest Gravitational Wave Source So Far
Striving to Find Interdisciplinary Answers to Environmental Problems
Young Scientists Receiving Excellent Young Science Fund 2020
The XPLORER PRIZE (Mathematics and Physics)
Probing Deep into Shallow Earthquakes Induced by Shale Gas Production in Sichuan
Breaking the Wall of Cryosphere Monitoring
MoE Higher Education Outstanding Scientific Research Output Award
Trials and Triumphs with Biochemical Research

Past Issue