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Sensor maintenance during the ACO-8 cruise (5/28-6/2/2021): the BSP-5 with CTD4 and CAM2 with lights were installed.

Audio/Video Library

A collection of interesting video and audio clips from the ACO site.


Slide 1

ALOHA Cabled Observatory-The Movie

Slide 2

JASON doing post-deployment clean-up.

Slide 5

Shrimp paying a visit to the ACO.

Slide 6

Junction Box being prepared for deployment.

Slide 5

Free-fall deployment of the camera.

Slide 5

Gelatinous sea creatures floating near the ocean floor.

Slide 7

Pelagic sea cucumber floating near the ACO.

Slide 8

Video Clips from the 2014 ACO-3 cruise

Example Frame

ACO-3 Cruise Videos

Sealife Videos

ACO Construction Videos

Primera Blu-Ray Robot Video

Real-Time Audio and Spectragraph

of the ACO hydrophone


 Click here for the ACO YouTube spectrograph recordings.


15 minutes of microquakes recorded on June 4, 2012 on the BB hydrophone. The rate is sped up by a factor of 32 for good listening.

Humpback whales at the ACO

Humpback Whales heading back north towards Alaska.

Humpback and Minke whales recorded at the ACO on March 18, 2013

Humpback whales recorded at the ACO on March 26, 2016

Minke whales at the ACO

Loud minke whale boing about 30 sec before the end of the file. Lots of snaps and high-frequency chirps recorded on December 31, 2011.

3.2 Magnitude Earthquake

Sound file decimated to 400 Hz sample rate and sped up by a factor of 10.

Fin Whales

Fin whales (sound speeded up 25X)


Whales (sound speeded up 10X)

Glass Balls Popping

Glass spheres provide floatation for oceanographic instrumentation to be recovered from the ocean bottom. Any small imperfections in the glass can cause the spheres to implode when under the immense pressure of the deep ocean. A glass sphere can be heard imploding by the ACO hydrophone on July 7th, 2011 from a oceanographic instrument mooring about 6 miles away. The subsequent echoes heard after the initial implosion are reflections of the initial sound from both the ocean surface and the seafloor.

Humpback and Minke Whales

Humpback and minke whales can be heard from a hydrophone during the Proof Module deployment for the ACO in April 2008. Humpback whales are known for their intriguing whale "songs" often heard during their annual visit to Hawaiian waters. Minke whale sounds begin about 13 seconds into the audio file.

Sperm Whales

A sperm whale pod can be heard from the ACO Proof Module hydrophone in 2007. The sperm whale sounds are distinguished as a series of "clicks". Humpback whales can be heard in the background of this audio file singing their "songs".