Tsunami-recording in the deep sea

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The PACT system consists of a bottom unit (white sphere -- right) and a surface unit (pressure casing on frame -- right). The battery-driven bottom unit contains pressure sensors an acoustic transmission modem as well as a release unit and a relocati ...
The PACT system consists of a bottom unit (white sphere -- right) and a surface unit (pressure casing on frame -- right). The battery-driven bottom unit contains pressure sensors, an acoustic transmission modem, as well as a release unit and a relocation device, the latter facilitating post-operation instrument recovery. The surface unit contains the acoustic reception modem. Attached to the underside of the surface buoy, a cable connection enables data transmission to the warning center. Credit: Develogic
In order to extend alert times and avoid false alarms, a new seafloor pressure recording system has been designed to detect tsunamis shortly after their development in the open ocean. The project is directed by scientists of the working group ‘Marine Observation Systems’ at the Alfred Wegener Institute for Polar and Marine Research, part of the Helmholtz Association. Successful testing of the recording system off the Canary Islands in November 2007 means that a new mile stone for the development of the Indian Ocean Tsunami Early Warning System (GITEWS) has been reached.


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