San Francisco State University Physics and Astronomy Department SFSU Pacific Oceanography Project Spectrograms Resulting In False Positives in Blue-Whale "B" Call Identification { humpback calls |fin whale calls |earthquakes |blue whale calls |ship sounds

April 16, 2002 (day106), 5:45 UT The lines at low frequencies (around 50 Hz) are causing false positives. Are they related to the humpback song present? Are they biologics at all?