關東
地震風險：高
Ibaraki Prefecture 地震風險
Ibaraki is among Japan's most seismically active prefectures, sitting near the triple junction of the Pacific, North American, and Philippine Sea plates. Felt earthquakes are more frequent here than almost anywhere else in Japan, and the 30-year probability of an M6.7+ earthquake off Ibaraki exceeds 85%.
主要斷層・地震帶
Ibaraki sits near the triple junction of the Pacific, North American, and Philippine Sea plates, producing a complex crustal structure with frequent intra-slab events in addition to trench-boundary earthquakes. Southern Ibaraki (Tsukuba, Toride) would experience Intensity 6+ in a Tokyo Metropolitan Earthquake scenario.
主要斷層線
日本海溝 이바라키현 앞바다 단층 가누마 단층