Mysterious Underwater Sound Quiz

In which year was the mysterious sound first recorded in the Pacific Ocean?

• 2005

• 2000

• 1997

• 1995

What is the name given to the mysterious sound recorded by NOAA?

• Deep Blue

• Pacific Echo

• Slowdown

• Ocean Whisper

How often does the 'Slowdown' sound reportedly occur each year?

• Four times

• Three times

• Twice

• Once

What is one possible explanation for the 'Slowdown' sound?

• Marine life communication

• Underwater earthquakes

• Friction between sliding ice sheets and land

• Volcanic activity

Which organization recorded the 'Slowdown' sound using underwater microphones?

• USGS

• NOAA

• NASA

• EPA