Low Frequency Hydrophone V14

During the VISIONS'13 expedition, low frequency hydrophones, coupled with broadband seismometers, will be deployed at the base of the Cascadia Margin (Slope Base), and at the base of and summit of Axial Volcano.

Part of this detection and monitoring of seismic events  will be provided by low-frequency hydrophones (2 Hz to 20 KHz) that are well suited to detect the hydroacoustic tertiary phase of T waves of oceanic earthquakes. These sensors also detect solid-earth P waves from regional and teleseismic earthquakes. Coupled with the Ocean Bottom Seismometers, the low-frequency hydrophones will increase our ability to detect offshore earthquakes in real-time, determine their magnitude, and enable better location accuracy.

During VISIONS '14, low-frequency seismometers are scheduled for deployment in the central (MJ03F) and eastern (MJ03E) Axial caldera, and at Axial Base (MJ03A), Slope base (MJ01A), and Southern Hydrate Ridge Summit (LJ01B).

Low frequency hydrophone Overview