南海トラフ巨大地震速報

【南海トラフ巨大地震】

死者最大３２万人、全壊は約２３８万棟想定　内閣府

2012.8.29 18:07 （1/2ページ）［防犯・防災］

　東海・東南海・南海地震の震源域が連なる南海トラフ（浅い海溝）の最大級の巨大地震について内閣府は２９日、死者は関東以西の３０都府県で最大３２万３０００人に達するとの被害想定を公表した。マグニチュード（Ｍ）９・１の地震で最大３４メートルの津波が太平洋岸を襲い、震度７の強い揺れなどで最大約２３８万棟が全壊・焼失すると推定。東海地方から九州までの広い範囲で甚大な被害の恐れがあり、国や自治体に防災対策の抜本的な強化を迫るものとなった。

　死者数の最大は東日本大震災（死者・行方不明約１万８７００人）の２０倍近い超巨大災害で、２００４年のスマトラ島沖地震（約２８万人）を上回る世界最大規模。ただ、南海トラフで起きる次の地震を想定したものではなく、発生頻度は極めて低いとした。死者数は幅があり、最小の場合は約３万２０００人になる。

 Recent announcement from the government on Nankai Earthquake risk.
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TOKYO : Japan's government on Wednesday unveiled a worst-case disaster scenario that warned a monster earthquake in the Pacific Ocean could kill over 320,000 people, dwarfing last year's quake-tsunami disaster.

Tokyo's casualty toll estimate was based on a catastrophic scenario in which a powerful undersea quake of about 9.0 magnitude sparked a giant tsunami that swamps Japan's coastline south of Tokyo.

The Cabinet Office's hypothetical disaster would see the quake strike at night-time during the winter with strong winds helping unleash waves that reach 34-metre (110 feet), sweeping many victims away as they slept.

Many of the estimated 323,000 victims would be drowned by the tsunami, crushed under falling objects or in fires sparked by the disaster, it said.

On March 11 last year, a 9.0-magnitude quake struck seismically-active Japan in the early afternoon, triggering tsunami waves that reached 20 metres.

About 19,000 were killed or remain missing while the tsunami slammed into the Fukushima Daiichi nuclear plant, sending reactors into meltdown and sparking the worst atomic crisis in a generation.

"As long as we live in Japan, we cannot deny the possibility of a huge earthquake and tsunami," Masaharu Nakagawa, state minister for disaster management, told reporters on Wednesday.

The report was designed to paint a worst-case scenario and help officials boost their disaster preparedness.

An estimate in 2003 assumed casualties of about 25,000 people, but that scenario envisioned a less powerful 8.4-magnitude quake striking a smaller area.

The deadliest quake in Japanese history struck the central Kanto region in 1923, killing at least 100,000 people.