They are also rare opportunities to study highly dynamic processes. The proposed equipment for rapid response and monitoring within activity 2 include:
Light-weight Ocean-Bottom Seismometers
MARMOR aims at acquiring a set of easily transportable seismological sensors (light-weight, compact size, non-hazardous batteries) to be deployed within days of the start of the crisis, using small ships of opportunity, to study the critical starting phase of the crisis, when signals are usually the strongest and information is crucial for crisis response and management.
Host : Ifremer/GeoOcean.
Autonomous, landing hydrophones
Autonomous landing hydrophones have the ability to land on the sea floor, stay several days or weeks to record acoustic waves and then lift back to the surface to transmit their data through satellite link. Landing hydrophones aim at complementing OBS and at providing regular information every few days during a crisis.
Host : IRD/GeoAzur.
Low-drift pressure (A-0-A) gauges & “classical” pressure gauges
Monitoring deformation is key to evaluate the location, size and potential migration of sources (rupture area, transient slip, volcanic inflation/deflation sources, areas of slope instability). Yet, the only available technology are pressure gauges recording changes in the water column weight that eventually can be converted into vertical displacements.
Host : CNRS/INSU.