One way to hold this word: something violent happens in one spot, and the force of it does not stay there. A wall of pressure pushes in every direction, faster than anyone can react, and whatever stands in its path gets hit. Windows, walls and ground are hit by the real thing; people and groups are hit by the news version of it.
Two branches
爆炸、地震推出去的壓力波
這一組就是字面上的那道力量牆，是整個字最原始的畫面。
noun · B2
A very strong wave of pressure and heat that spreads out fast through the air, the water, or the ground after a sudden violent event such as an explosion or an earthquake, or when something moves faster than sound.
衝擊波
壞消息傳開造成的震撼
把那道往外擴散的力量換成一則壞消息：消息傳到哪裡，哪裡的人就被震一下。這是一種看待消息的方式，不是說這個用法在歷史上比較晚才長出來。
noun · B2
Shock waves are the strong feelings of shock, and the trouble that follows them, which spread quickly through a group of people or a place when something bad or surprising happens. This use is most common in news reports.
震撼；衝擊