Unexplained Ocean Sounds Quiz

What is the 'Upsweep' sound believed to be caused by?

• A secret submarine base

• Volcanic activity

• A giant sea creature

• An underwater train

Which sound was only detected by one hydrophone?

• Julia

• Upsweep

• Whistle

• Bloop

What was the initial hypothesis about the origin of the 'Bloop' sound?

• An iceberg collision

• A volcanic eruption

• A large living creature

• A man-made explosion

What did researchers eventually conclude about the 'Bloop' sound?

• It was caused by a giant sea creature

• It was a result of ice quakes

• It was a man-made sound

• It was an underwater explosion

Where is the 'Julia' sound believed to have originated?

• Near the equator

• Near the coast of South America

• Off the tip of Antarctica

• In the central Pacific Ocean

What is one theory about the cause of the 'Julia' sound?

• A secret military operation

• A volcanic eruption

• A giant sea creature

• An iceberg breaking free

What is the 'Slowdown' sound characterized by?

• Constant frequency

• Decreasing frequency

• Increasing frequency

• Random frequency changes

How often is the 'Slowdown' sound reportedly heard?

• Every month

• Every week

• Three times per year

• Once a year

What does the 'Train' sound resemble?

• A bird's call

• A train horn

• A ship's whistle

• A car engine

What was the original purpose of the hydrophone arrays used to detect these sounds?

• To monitor volcanic activity

• To detect Soviet submarines

• To track weather patterns

• To study marine life