Seaquake
/ˈsiːkweɪk/
Definition 1 of 1
Pro Tip 1/3Natural Disaster
Seaquake refers to a natural event under the ocean that can lead to other disasters on land. 
After the seaquake, the coastal village prepared for potential floods.
Pro Tip 2/3News Report
Often used in news or scientific reports to describe events related to earthquakes at sea. 
The seaquake off the coast was reported at a magnitude of 6.1.
Pro Tip 3/3Tsunami Trigger
Seaquakes can sometimes trigger tsunamis, an important detail to understand their potential danger. 
Authorities alerted the possibility of a tsunami after a severe seaquake.