< p >你的问题不能回答准确,因为结果主要取决于一个关键未知参数:震源深度D。< br >显示这个,让我用实证关系称为莉莉·公式:< / p > < p > $ $ m = \ log (A) - 2.48 + 2.76 * log (d) $ $ < / p > < p >地点:< / p > < p > m美元是本地级(无单位)。< / p > < p >一个美元的振幅最大地面位移纵波(微米),以0.8赫兹。< / p > < p > d美元你的震中距公里远距离(数百公里)。< / p > < p >注意,低的值(当接近震中)方程不成立,因为日志趋于无穷。这就是为什么这些经验公式只是用于长震中距离,不是在当地规模(肯定不是在震中)。< / p >Following your example, if your earthquake is very shallow you would have a huge magnitude difference between your station at distance d and the epicenter, whereas if the hypocenter is 600 km deep, m will be very similar in both places.
So you need to know the depth of the earthquake to derive the magnitude in the epicenter.