They're acoustic shockwaves, like tsunamis, but with no seismological source.

The Abyss (1989)
BERG
A screenplay character in The Abyss (1989).
- lines
- 3
- words
- 42
- scenes
- 1
- dialogue
- 0.5%
- avg words / line
- 14
- shortest / longest
- 10 / 22
Sample dialogue
Yeah. I'll be right there... I have to go. Look, we don't know what it is! Okay? Not the slightest goddamn idea!
scene 242 — INT. FINAL CHAMBERThey're acoustic shockwaves, like tsunamis, but with no seismological source.
scene 242 — INT. FINAL CHAMBERThe waves are propagating toward the shorelines of every continent--
scene 242 — INT. FINAL CHAMBER
Bookends
Yeah. I'll be right there... I have to go. Look, we don't know what it is! Okay? Not the slightest goddamn idea!