Colloquium
Department of Physics, NCU
Unlock the secrets of slow earthquakes in Taiwan
Speaker
陳卉瑄副教授(Kate Huihsuan Chen)
臺灣師範大學地球科學系(Department of Earth Sciences, NTNU)
Date 2015.11.17(Tue)
Time 14:00
Place S4-625
「歡迎大學部同學參加，可獲得中大護照認證2小時」
Abstract:
Slip on a plate boundary can be seismic or aseismic, complementing each other in time and space to accommodate the long-term plate motions. They result in different seismic behaviors that have varying rupture durations. In the seismogenic zone, ordinary earthquakes experience rapid slip on a fault with a few ~ tens of second durations. While below the seismogenic zone, slow rupture propagation and/or low slip rate can be also taking place with a wide range of duration from minutes to days, called slow slip events. Southern Central Range of Taiwan, a place where deep-seated tectonic tremors (a proxy of slow slip) and earthquake swarms are closely located in space and highly correlated in time, provides rare opportunity towards the understanding of physical mechanisms governing different style of slip. This talk will start with a brief overview of worldwide slow earthquakes phenomena, what can they tell us and how do we detect such slow activity. Then an introduction to the spatio-temporal characteristics of slow earthquakes in Taiwan will be given, leading to further discussion on their controlling factors and possible tectonic origin.