PALAOA near realtime sound and spectrogram at Loading: UTC

Webcam image of the hydophone location Typical sounds that may be picked up by our hydrophones in the ocean under the ice of Antarctica: Animals: Weddell Seals (chirps and trills), Crabeater Seals (cow like roars), Ross Seals (sirens and "laser swords"), Leopard Seals (howling trills), Antarctic Minke Whales (100-300 Hz pulse trains, the "BioDuck"), Blue Whales (chorus at 19-27Hz and pulses ~10Hz), Fin Whales (chorus at 98 Hz), Killer Whales (clicks and whistles 2000-20000 Hz), Humpback Whales (no songs, only short calls), Environment: Calving Ice Shelf (like small splashes, explosions, or roaring thunder), Sea Ice (whining), Passing Icebergs (screaming, crying, breathing and explosive sounds), Storms (broadband hiss), Earthquakes (low frequency roaring <100Hz), Human: Ships (Broadband noise with characteristic spectral lines), RAFOS Source (260 Hz tone daily 12:40 UTC); Non-acoustical Natural Electromagnetic Interference: Sferics (clicks above 10000 Hz caused by tropical thunderstorms), Electric Discharges during snow drift (strong broadband clicks); Technical Crosstalk: Switching Relays (click every full hour), Wind Charger, Data Transmissions (all kind of annoying noises, e.g. 09:00 UTC), GPS Timestamps (click and buzz every 10 minutes). Satellite imagery of the site is available at You can also listen to the live stereo webradio stream or watch the latest high resolution spectrogram created with SpectrumLab. All data © AWI 2014, use according to cc-by-sa license, historical recordings (2005-2013) available via the PANGAEA database. PI & contact: Lars Kindermann

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