Following the processing of data from earthquakes in the area from 2016 to 2021, the researchers discovered the following: The model developed specifically the scale designed for characterization of the areas surrounding Nyamulagira (29.0°E-29.5°E; 1.2°S-1.5°S) and Nyiragongo (29.0°E-29.5°E; 1.45°S-1.75°S), is valid, logical, and reasonable, as are the assumptions made. The concept of "volume density" of earthquakes or seismic energy was introduced in the the application of these hypotheses, along with other parameters, has allowed the craters of these two volcanoes to be located in accordance with field observations: the crater of Nyamulagira volcano is located at [29.15°E; 1.35° S] and the crater of Nyiragongo volcano is located at [29.25°E; 1.50° S]. Structures of Nyamulagira and Nyiragongo are strikingly similar, indicating that Nyamulagira is a subset of Nyiragongo, with the latter showing particularly striking similarities in its Western crater. Structures of Nyamulagira and Nyiragongo are strikingly similar, indicating that Nyamulagira is a subset of Nyiragongo, with the latter exhibiting particularly striking similarities in its Western crater.The similarity rate between the two is 75%, based on structural factors shared by Nyiragongo and Nyamulagira. Nyiragongo has a 25% singularity. Justified by its extremely complex shape (stratovolcano with a crater made up of three platforms,). With a few exceptions, there is a correlation between minimum volume density of energy and maximum volume density of the number of earthquakes at the same location for both Nyamulagira and Nyiragongo, and the characterization around the craters according to quadrants notes that the degree of heterogeneity is 100% for Nyamulagira, as opposed to 75% for Nyiragongo, with high activity on the left (West).Findings indicate that the magma reservoirs of the volcanoes are predominantly spherical for Nyamulagira and cylindrical for Nyiragongo. As a result, the geological characteristics in the area have been highlighted by this model; the geological implications of this model can be used for geological prospecting.These results, and others above, show that the structure of the Nyamulagira Volcano is a substructure of (included in) the Nyiragongo. It would be necessary to confirm the hypotheses suggested earlier. Besides, this necessitates the expansion or continuation of research into other areas with volcanic-seismic activity. We note that the model effectively compares various structures with seismo-volcanic activity.