關東
地震風險：very-high
Chiba Prefecture 地震風險
Chiba faces multiple serious earthquake scenarios: a Tokyo Metropolitan Earthquake, a Boso offshore earthquake, and broader Tokai/Nankai-linked events. Tokyo Bay coastal reclaimed land carries extreme liquefaction risk. The 2011 earthquake demonstrated the scale of potential damage.
主要斷層・地震帶
Chiba's Boso Peninsula sits at the intersection of the Pacific, North American, and Philippine Sea plates. Reclaimed coastal land in Tokyo Bay (Urayasu, Makuhari) carries extreme liquefaction risk. A slow-slip phenomenon off the Boso coast has been documented on a several-year cycle, which research suggests could contribute to earthquake triggering.
主要斷層線
보소 반도 동방 앞바다 단층 간토 단층계 도쿄만 단층