KaKiOS-16: a probabilistic, non-linear, absolute location catalog of the 1981-2011 Southern California seismicity

This is the KaKiOS-16 earthquake catalog for southern California. We locate the southern California seismicity using the state-of-the-art probabilistic and nonlinear method NonLinLoc. We use only the P wavepicks to avoid introducing the velocity-model and picking-time errors of the S phase, which is harder to detect and thus less constrained. Using a subset of the best locatable earthquakes, we conduct a joint inversion using the VELEST software to obtain a minimum 1D velocity model and station corrections. We use the NonLinLoc method with this 1D velocity model and the inferred model uncertainties to obtain realistic location distributions for each event.<br>本数据集为南加州地区的KaKiOS-16地震目录（KaKiOS-16 earthquake catalog）。本研究采用当前最先进的概率性非线性方法NonLinLoc，对南加州地震活动进行定位。为规避S波带来的速度模型误差与拾取时间误差——S波更难识别，因此约束性更弱，本次研究仅采用P波至拾取数据。我们选取定位效果最优的地震事件子集，借助VELEST软件开展联合反演，以获取最小一维速度模型与台站校正参数。随后我们将该一维速度模型与反演得到的模型不确定性参数结合NonLinLoc方法，为每个地震事件生成符合实际物理意义的定位分布结果。