A tropical storm is building strength some distance from your MODU. Waves are coming from the east, with periods increasing from 5 seconds to 15 seconds. The swell is from the east. Where was the storm when these new swells were generated?

Correct Answer: Option B — To the east of you

Swells propagate outward from a storm center; increasing wave periods from a consistent easterly direction indicate that the generating meteorological disturbance lies directly up-swell to the east of the observer's geographic position.