求问这句话的主语

加油加油yayyay

Often incorrectly referred to as a tidal wave , a tsunami , a seismic sea wavethat can reach speeds of up to 150 miles per hour and heights of up to 200 feet, is caused by underwater earthquakes or volcanic eruptions .


这句话的主语是什么呢？ a tidal wave , a tsunami , a seismic sea wave可以算是主语吗？ 但是他们前面有referred to as，所以referred to as a tidal wave , a tsunami , a seismic sea wave构成了modifier，是不是就不可以再看作是主语了呢？

free_mind

a tsunami ~ subject

a tidal wave ~ modifier
a seismic sea wave ~ modifier