Estimation of frictional properties of the Yaeyama slow slip source region and prediction of the recurrent events by assimilating GPS data

我们在琉球群岛的最南端设置了四个永久性的GPS观测站，以了解那里的慢滑事件的产生机制。全球定位系统时间序列表明，滑动没有显示任何传播。然后，我们开发了一个反演代码，可以推断断层几何形状的时间演变。数值试验结果表明，效果良好。此外，我们开发了一个伴随代码来推断板边界的摩擦参数。数值试验也显示了良好的结果。

We installed four permanent GPS stations on the southern most Ryukyu Islandsto understand the generation mechanism of slow slip events there. GPS time series indicated that the slip did not reveal any propagation. We then developed an inversion code that can infer the temporal evolution of fault geometries. Numerical tests showed good results. In addition we developed an adjoint code to infer the frictional parameters of a plate boundary. Numerical tests showed good results, too.