论文部分内容阅读
我国基本地震台网过去使用中长周期地震仪,由于受频带限制,虽然记录到一些幔核界面的衍射波震相Pdif,但震相初至清晰可辨的较少,震中距大于160度的Pdif,则从未记录到。自从763型长周期地震仪在我国基本台网铺设以来,则相继记录到震中距110—150度的初至清晰的Pdif。 1985年3月3日在智利发生了一次强震,美国PDE目录给出了如下参数:0:22~h47~m06.9~s;φ:33.155s;λ:71.980w;h:33km;Msz:7.8。这次地震在我国基本台网中
In the past, the use of medium and long-period seismometers in China’s basic seismograph networks, due to the limitation of frequency band, recorded some diffraction peaks of the mantle-core interface Pdif, but the initial phases of seismic facies were clearly distinguishable. The epicenter distance was more than 160 degrees Pdif, never recorded. Since the Type 763 long-period seismograph was laid in our country’s basic network, first-mover clear Pdif from epicenter 110-150 degrees was recorded successively. A strong earthquake occurred on March 3, 1985 in Chile. The PDE catalog of the United States gives the following parameters: 0:22 ~ h47 ~ m06.9 ~ s; φ: 33.155s; λ: 71.980w; h: 33km; Msz : 7.8. The earthquake in our basic network