Based on the seismic waveform records of the Yunnan regional seismic network from 2012 to 2023, the joint inversion method was used to obtain the media attenuation Q value, the site response of 67 stations, and the source parameters of 2819 earthquakes above ML 2.0 in the study area. The results show that in Yunnan region, based on the geometric attenuation model of three seismic waves, the non elastic attenuation model accurately reflects the complex structure and strong seismic activity characteristics of the region. Among the 67 stations in the study area, the overall site response does not show much amplification effect, but there is obvious high-frequency attenuation phenomenon, and the amplification factor of the site in the excellent frequency band 1–6 Hz is mostly 1–4 times, while the attenuation of the site in the high band (above 10 Hz) is mostly between 0 to 95%. Among them, the site response value of 12 stations fluctuates around 1; the site response of the four stations is close to 1 at low frequency, and is amplified at high frequency. The overall response calculation result of the five stations is slightly less than 1. 46 stations show a slight amplification at low frequency and attenuation at high frequency. Through the correlation analysis of the parameters of each seismic source, it is found that the local magnitude is positively correlated with moment magnitude, seismic moment, stress drop, apparent stress and radiant energy, and negatively correlated with corner frequency. In general, the aftershock areas of Yangbi, Yingjiang and Mangshi earthquakes in western Yunnan and the southern section of the Honghe fault in southern Yunnan have relatively high levels of stress relief from small and medium-sized earthquakes, while the areas along the Jinshajiang-Honghe fault zone, especially along the southern section of the Honghe fault zone in southern Yunnan, are concentrated areas of high stress and seismic drops, indicating that the faults here may be subjected to relatively strong tectonic shear stress.

利用云南区域地震台网2012—2023年的地震波形记录, 采用联合反演方法, 获得研究区的介质衰减Q值、67个台站的场地响应以及区内ML 2.0以上2819次地震的震源参数。结果显示, 在三段地震波几何衰减模型基础上, 非弹性衰减模型较准确地反映了云南地区构造复杂、地震活动性较强的特征。在研究区67个台站中, 场地响应总体上没有出现明显的放大效应, 但存在显著的高频衰减现象。在卓越频段1~6 Hz, 场地放大倍数大多为1~4 倍; 在10 Hz以上高频段, 场地的衰减幅度大多在0~95%之间。其中, 12个台站的场地响应值在1 附近波动; 4个台站的场地响应值在低频段接近1, 在高频段放大; 5个台站的场地响应值整体上略小于1; 46个台站出现低频段稍微放大, 高频段衰减的现象。各震源参数的相关性分析结果表明, 地方性震级与矩震级、地震矩、应力降、视应力及辐射能量均正相关, 与拐角频率负相关。滇西漾濞、盈江、芒市地震余震区及滇南红河断裂南段是中小地震应力释放水平相对较高地区, 沿金沙江–红河断裂带, 尤其是滇南红河断裂带南段沿线则是高应力降地震集中的区域, 说明这里的断层可能受到相对较强的构造剪应力作用。