A global analysis of seismic waves has identified a widespread sharp velocity anomaly at the base of the low seismic velocity zone that is consistent with partial melting, closing a decades-long debate about the origin of this zone.

中文翻译：

---

部分熔融的地幔

对地震波的全球分析已经在低地震速度区的底部发现了一个广泛的锐速异常，这与部分融化一致，结束了关于该区域起源的长达数十年的争论。