【摘要】 本文通过远震S波到时减P波到时(或极远震PP到时减PKP到时)之差与地震最大面波到时的关系,来推测一个地震发生后,只要震相S、P(或PP、PKP)已确定,就能推测最大面波的到时。反过来,最大面波到时一定,就能基本确定S(或PP)波到时的大致位置,再根据其它震相在S(或PP)波前后出现的规律,从而可靠的分析地震,在地震速报和震相分析当中很有实用价值。更多还原

【Abstract】 Based on the relationship between the S-P(or PP,PPK)wave lag time and the arrival time of the largest earthquake surface wave,it can be known that,provided the earthquake phase S and P(or PP,PPK) are fixed,the arrival time of the largest earthquake surface wave can be predicted.On the other hand,if the arrival time is fixed,S wave’s(or PP wave) arrival location can be generally predicted;according to the earthquake phase laws before and after the S wave(or PP wave),earthquakes can be effectively analyzed,which is useful for earthquake quick report and earthquake phase analysis.更多还原