在地震资料处理中，正确的初至时间，是解决复杂地表静校正问题所需的关键参数。
In seismic data processing, the accurate first break time is the key parameter to solve static correction problems of complex surface.
本文提出一种将局部算法与扫描算法相结合的、用有限差分解程函方程求取地震波初至时间的方法。
A new technique is given here, which combines partial algorithm with scanning algorithm and obtains wave arrival times by solving eikonal equation with the use of finite difference method.
数字记录的初至波早于模拟记录，且持续时间较长，大部分的数字地震震级比模拟记录、标准震级小。
The first array wave in digital record is earlier than that in analog record, and with longer duration. It also found that the most of the ear...
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