As the subducting plate sinks deeper into the earth , it encounters higher and higher temperatures and pressures , which release the significant amount of water trapped in water - rich minerals that exist within the slab 當(dāng)板塊越向地心隱沒,溫度和壓力便會越高,這些條件會促使大量的水從板塊中含水豐富的礦物里釋放出來,而在這股液體從板塊向上竄升之際,便會發(fā)生無聲地震。