The  scene: Shaanxi, northern China; the year: 1556. The earthquake had an estimated magnitude of 8  and registered XI on the Mercalli intensity scale.

场景：陕西，中国北方；年份：1556 年。地的级为 8 级， Mercalli 烈度等级上登记为 XI。

This particular one would have probably  registered XI on the Mercalli intensity scale, and its intensity is estimated to be  around 7.5 on the surface wave magnitude.

这个别的可能 Mercalli 强度等级上登记为 XI，其强度波级上约为 7.5。

The Valdivia Earthquake in Chile had a ridiculous  magnitude of 9.5, and it registered XII – the highest level – on the Mercalli intensity scale,   lasting around 10 minutes.

智利的瓦尔迪维亚地级高达 9.5 级， Mercalli 烈度等级上记录为 XII（最高级别），持续时间约为 10 分钟。

With an estimated magnitude of 7.9 and X intensity  of the Mercalli intensity scale, it is believed to have caused unprecedented destruction in the  region, leaving as many as 200,000 people dead.

据，它的级为 7.9 级，强度为 Mercalli 强度等级的 X，据信对该地区造成了前所未有的破坏，导致多达 20 万人死亡。