• [L *B] 6 earthquake : at intervals of 22 years
○ Predictable : 1988-1992
§ Detect precursor : observation networks
§ However no earthquake
○ Paleoseismology
§ Logical feature: fault scarp, landslides …
§ 1989 [KES]: chronology
□ MEAN :132;VS 44-332 years
○ [L]: unfazed
§ AIDS VACCINE
○ [RQ]: help mitigate hazards
○ But others : -
§ [RG]: short nor long
□ Assume region are dangerous