在目前情况下,光记录地震仪(基式或维式)虽然是不可见的记录,但是,在观测中比起电子记录来讲参数是很稳定的,波形失真度很小,鉴于这些优点一直在台上使用,可是不足之处时间服务精度差。根本不能适应地震工作的需要!例如,要研究更深入的课题震源的垂直分布、发震的机制、震源的变化等等。这 In the present case, although the optical recording seismograph (basic or vorticity) is an invisible record, the parameters are very stable in observation compared with the electronic record, and the waveform distortion is very small. In view of these advantages Use on the stage, but inadequate time service accuracy is poor. For example, it is necessary to study the vertical distribution of focal points of deeper topics, the mechanism of earthquake occurrence, the change of source, and so on. This