Kikai-Akahoya Eruption Had Mixed Effects on Jomon Populations
About 7,300 years ago, the Kikai-Akahoya eruption burst from the seafloor near southern Japan and became one of the largest eruptions of the last 11,700 years. It generated strong earthquakes and tsunamis and covered parts of the islands with thick ash. The event led to population declines in some Jomon hunter-gatherer areas and increases in others.
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[paragraph] No extra. Ensure no copying source phrasing. We used "7,300 years ago" exact? Source says "About 7,300 years ago". We used "about 7,300 years ago" exact phrase. Is that copying? It's factual phrase. Could rephrase "roughly 7,300 years before present" to avoid. "southern Japan" exact. Could say "the southern Japanese archipelago" or "near what is now southern Japan" but that's adding "what is now" maybe okay. "largest eruptions of the past 11,700 years" similar. "strong earthquakes and tsunamis" exact. "thick ash" exact. "Jomon hunter-gatherers" exact. "some populations declined, while others increased" close. Need original wording. Let's revise to avoid exact source phrasing. EXPANDED: "Archaeology often examines how past communities handled abrupt environmental shocks. In this case, roughly 7,300 years before present, a vast eruption broke out from the seabed near the southern Japanese archipelago. It ranks among the biggest eruptions of the last 11,700 years. The blast