An instability may pertain-to a flank.Logical formLearned from3 sentences. A flank may undergo a strengthening.Logical formLearned from3 sentences. Lavas may predominate on flanks.Logical formLearned from3 sentences. Monitoring of flanks may suggest expansion.Logical formLearned from3 sentences. A flank may undergo bulgings.Logical formLearned from3 sentences. A flank may pertain-to a (summit dome).Logical formLearned from3 sentences. A series of (basaltic andesite spatter cones) may erupt on a (northeast flank).Logical formLearned from3 sentences. Flanks may undergo a monitoring.Logical formLearned from3 sentences. A bulge can be on a flank.Logical formLearned from3 sentences. A crew may install a seismometer on a (northwest flank) of a volcano.Logical formLearned from3 sentences. Faults can be on a flank.Logical formLearned from3 sentences. A crater can be on a flank.Logical formLearned from3 sentences. A fan can be on a flank of a volcano.Logical formLearned from3 sentences. Flanks may pertain-to a summit.Logical formLearned from3 sentences. A zone can be on a flank.Logical formLearned from3 sentences.