カリフォルニアのロングバレーカルデラ破局噴火が噴火した場合はどうなりますか？
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火山とロングバレーカルデラ
アラスカにある潜在的な超火山。クリーブランド山の麓
ここロングバレースーパー火山...カリフォルニア
Top 10 Largest Volcanic Eruptions
