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在阿尔卑斯山脉东南部地区进行了震动图(ShakeMap)的实时生成研究。ShakeMap软件系统已经在该地区安装,并已经可以与Antelope数据采集系统获得稳定的界面,能够从波形数据中提取地面运动的参数,并且在地震发生5min内生成震动图。为了评价台站密度的影响,我们计算了2004年博韦茨地震(斯洛文尼亚西北部)的合成地震图,以及不同网格大小虚拟台站的震动图。结果表明,密集且均匀的台站分布是产生精确震动图的基本条件,目前弗留利中部地区的台站密度已经足够可靠地估计最强烈震动区域范围内的震动程度。使用特定地区的地面运动预测方程和从记录到的地面运动预测宏观地震烈度的经验关系,相关的震动图能够实时或准实时地生成。通过弱震动(2007年克劳特地震)和强震动(1998年博韦茨地震)的观测数据和ShakeMap结果的比较,证明了该模型的正确性。
A real-time generation study of ShakeMap was conducted in the southeastern Alps. The ShakeMap software system has been installed in the area and has been able to obtain a stable interface with the Antelope data acquisition system, extract ground motion parameters from waveform data, and generate vibration maps within 5 min of an earthquake. In order to evaluate the impact of station density, we calculated synthetic seismograms of the 2004 Bovec earthquake (northwestern Slovenia) and the vibration plots of virtual stations of different grid sizes. The results show that the dense and uniform station distribution is the basic condition for producing accurate vibration maps. At present, the station density in the central part of Friuli has been sufficiently reliable to estimate the degree of vibration in the strongest vibration area. Using the empirical correlation of ground-based motion prediction equations for a particular area and the predicted macro-seismic intensity from recorded ground motion, the associated vibrational plots can be generated in real-time or near real-time. The correctness of this model is verified by comparing the observed data of Shake-ShakeMap with the results of ShakeMap, the weak earthquakes (2007 Klot) and strong earthquakes (Bovec Earthquakes, 1998).