There is no evidence in favor of the effectiveness of these devices. A 2006 review by Jon Wieringa and Iwan Holleman in the journal Meteorologische Zeitschrift summarized a variety of negative and inconclusive scientific measurements, concluding "the use of cannons or explosive rockets is a waste of money and effort".[4] .. reason to doubt the efficacy of cannons from a theoretical perspective.thunder is a much more powerful sonic wave, and is usually found in the