Recent M 3–5 earthquakes near Cushing, Oklahoma, provide observations of intensity up to eight with accompanying ground motions due to close‐in acceleration records at distances less than 30 km from the epicenters. Adding these observations to the existing Central and Eastern North America (CENA) ground‐motion intensity correlation equation (GMICE) database allows the updating of a CENA GMICE from a linear (below intensity six) relationship to a more accurate bilinear relationship (up to intensity eight). The updating of the CENA GMICE is accomplished using linear regression and residual analysis. The analysis shows that the bilinear transition is fairly broad in the CENA covering one to two intensity units and one or more orders of magnitude in ground motion, depending on regression direction. The new CENA GMICE reduces the overprediction of ground motions from high intensities and the underprediction of intensities at both ends of the observed ground‐motion range.

中文翻译：

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更新的GMICE，适用于北美中部和东部，强度更高

由于距震中不到30 km的近距离加速度记录，最近在俄克拉何马州库欣（Cushing）附近发生的3-5次M级地震提供了多达八次强度的观测以及伴随的地面运动。将这些观测值添加到现有的中北美和东部（CENA）地面运动强度相关方程（GMICE）数据库中，即可将CENA GMICE从线性（强度小于6）关系更新为更精确的双线性关系（强度直至强度）八）。CENA GMICE的更新使用线性回归和残差分析完成。分析表明，根据回归方向，CENA中的双线性过渡相当广泛，覆盖了一到两个强度单位以及一个或多个数量级的地面运动。