The anelastic attenuation term found in ground motion prediction equations (GMPEs) represents the distance dependence of the effect of intrinsic and scattering attenuation on the wavefield as it propagates through the crust and contains the frequency-dependent quality factor, $Q(f)$, which is an inverse measure of the effective anelastic attenuation. In this work, regional estimates of $Q(f)$ in Central and Eastern North America (CENA) are developed using the NGA-East regionalization. The technique employed uses smoothed Fourier amplitude spectrum (FAS) data from well-recorded events in CENA as collected and processed by NGA-East. Regional $Q(f)$ is estimated using an assumption of average geometrical spreading applicable to the distance ranges considered. Corrections for the radiation pattern effect and for site response based on $V_{s30}$ result in a small but statistically significant improvement to the residual analysis. Apparent $Q(f)$ estimates from multiple events are combined within each region to develop the regional models. Models are provided for three NGA-East regions: the Gulf Coast, Central North America, and the Appalachian Province. Consideration of the model uncertainties suggests that the latter two regions could be combined. There were not sufficient data to adequately constrain the model in the Atlantic Coastal Plain region. Tectonically stable regions are usually described by higher $Q(f)$ and weaker frequency dependence ($\eta$), while active regions are typically characterized by lower $Q(f)$ and stronger frequency dependence, and the results are consistent with these expectations. Significantly different regional $Q(f)$ is found for events with data recorded in multiple regions, which supports the NGA-East regionalization. An inspection of two well-recorded events with data both in the Mississippi embayment and in southern Texas indicates that the Gulf Coast regionalization by Cramer in 2017 may be an improvement to that of NGA-East for anelastic attenuation. The $Q(f)$ models developed serve as epistemic uncertainty alternatives in CENA based on a literature review and a comparison with previously published models.

地震动预测方程 (GMPE) 中的非弹性衰减项表示波场传播通过地壳时固有衰减和散射衰减对波场影响的距离依赖性，并包含与频率相关的品质因子， $问(F)$，这是有效非弹性衰减的逆度量。在这项工作中，区域估计$问(F)$北美中部和东部 (CENA) 是使用 NGA-East 区域化开发的。所采用的技术使用 NGA-East 收集和处理的 CENA 中记录良好的事件的平滑傅立叶幅度谱 (FAS) 数据。区域$问(F)$使用适用于所考虑的距离范围的平均几何传播的假设来估计。辐射方向图效应和站点响应的校正基于${伏}_{秒30}$导致对残差分析的微小但统计上显着的改进。表观$问(F)$来自多个事件的估计在每个区域内结合起来以开发区域模型。提供了三个 NGA 东部地区的模型：墨西哥湾沿岸、北美中部和阿巴拉契亚省。对模型不确定性的考虑表明后两个区域可以合并。没有足够的数据来充分限制大西洋沿岸平原地区的模型。构造稳定的区域通常被描述为更高的$问(F)$ 和较弱的频率依赖性（$\eta$)，而活跃区域的典型特征是较低 $问(F)$和更强的频率依赖性，结果与这些预期一致。地域差异明显$问(F)$为在多个区域记录数据的事件找到，支持 NGA-East 区域化。对密西西比湾和德克萨斯州南部两个记录良好的事件的检查表明，Cramer 在 2017 年对墨西哥湾沿岸的区域化可能是对 NGA-East 的非弹性衰减的改进。这$问(F)$ 基于文献综述和与先前发布的模型的比较，开发的模型在 CENA 中用作认知不确定性替代方案。