Hydrophone data

Passive acoustic monitoring on the MARS Cabled Observatory

Browsing the spectrograms

The table below allows anyone to visually browse spectrograms generated from the hydrophone data. For each month and year, spectrograms are available for three frequency ranges: high (H = 5,000 to 128,000 Hz), medium (M = 250 to 5,000 Hz), and low (L = 0 to 250 Hz).  To browse through a series of spectrograms, select one of the frequency ranges under the month and year of interest, and all of the hourly spectrograms for that month will be loaded into the viewing panel.

Animation controls are located below each spectrogram. You can scroll forward in time (>) or backward (<);  stop scrolling ([]); step forward by one hour at a time (+1) or backward (-1); or restart from the beginning of month (START).