## 3 Results
### FCAZ Recognition of the Strongest Earthquake-Prone Areas
It should be noted that 67% of recognition objects in the mountain belt of the Andes were included in the recognized DPS clusters; 73.3%, in Kamchatka; 77.5%, in the Kuril Islands. DPS clusters are highlighted in green in Figures 7 and 8. In each of the three regions, the E\({}^{2}\)XT algorithm was applied to DPS clusters. The optimal values of its input parameters \(\omega\) and \(v\) were computed using the artificial intelligence block. That said, a regular geographical graticule and connection type C\({}_{8}\) was used. In Figures 7b and 8, the totality of green and red colors shows mapped FCAZ zones. Figures 7b and 8 show that FCAZ zones are well aligned with the location of the epicenters of the known strongest earthquakes. Out of 24 earthquakes with \(M\geq\) 7.75 in the mountain belt of the Andes, only one epicenter (4.2%) is located outside of FCAZ zones (Figure 7b) and creates a missed target error. This is an epicenter of the earthquake which occurred on 24 May 1940, more than 20 years before the commencement of systemic instrumental seismological observations in the region. Accordingly, the location of the epicenter can be distorted and this only error can be irrelevant. Out of the eight strongest earthquakes considered in the Pacific Coast of the Kamchatka Peninsula, the epicenter of just one (12.5%) does not belong to the recognized FCAZ zones (Figure 8a). This is an epicenter of the Ozernovskiy earthquake with \(M=\) 7.75 in Koryakia, which occurred on 22 November 1969, in the north of the considered region. In 2006 the Olyutorskoye earthquake occurred in Koryakia to the north of the border of the considered region, its magnitude was similar to the Ozernovskoye (Figure 8a). The missed target error of the Ozernovskoye earthquake and non-inclusion of the Olyutorskoye earthquake area in the considered region is caused by the fact that their epicenters are located outside of today's subduction zone. The conditions for the occurrence of these earthquakes outside of the subduction zone are dramatically different from the remaining considered strongest earthquakes in the region. This is also justified by the fact that the epicenters of both earthquakes lie outside of the territory in respect of which work is  
Figure 8: FCAZ zones prone to earthquakes with \(M\geq\) 7.75 and the epicenters of earthquakes with \(M\geq\) 7.75: Pacific Coast (a) of the Kamchatka Peninsula; (b) of the Kuril Islands. underway to make a long-term forecast of the strongest earthquakes using the method of Academician of RAS [PERSON] [53]. Accordingly, the epicenter of the Ozernovskoye earthquake is possibly not a missed target error. On the Pacific Coast of the Kuril Islands (Figure 8b), the epicenter of just one (9%) out of 11 known earthquakes with \(M\geq 7.75\) is a missed target error (the earthquake dated 1 May 1915, with \(M=8.3\)). Let us note here that the identification of the areas prone to earthquakes on the Pacific Coast of the Kuril Islands using pattern recognition methods has not been previously performed. It is undertaken in this paper for the first time. It is noteworthy that the FCAZ zones recognized in the mountain belt of the South American Andes contain 69% of earthquake epicenters with \(M\geq 5.0\) from among those present in the instrumental catalog used for recognition purposes. That said, they occupy approximately half of the area of the seismically active mountain belt of the Andes and the active subduction zone. FCAZ zones on the Kamchatka coast contain 73% of the epicenters of earthquakes, with \(M\geq 4.0\) among those present in the instrumental catalog and occupying 40% of the area of seismically active Kuril-Kamchatka and Aleutian Arcs falling within the boundaries of the considered region. On the coast of the Kuril Islands, FCAZ zones contain 81% of the earthquake epicenters with \(M\geq 5.0\) among those present in the catalog.