Recently, a comment named “Comments on “Quick Estimation of the Magnitude and Epicentral Distance Using the P Wave for Earthquake in Iran by R. Heidari,” was submitted to BSSA by Nazeri et al. (2021). The authors have commented on the validity and accuracy of the developed empirical relationships for an earthquake early warning system (EEWS), using BΔ approach by Heidari (2016). After carefully reading the comment, I find their statements that my work is wrong to be untrue and not valid.

In the BΔ and CΔ approaches used in EEWS, the...

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