Scientists from the Dublin Institute for Advanced Studies (DIAS), are currently onboard the Marine Institute's RV Celtic Explorer, on a scientific expedition that will take them across Ireland's Atlantic territorial waters and beyond, to uncover the secrets of Ireland's deep Atlantic – below the bottom of the ocean floor.
The 21-day deep sea mission (17th September – 6th October 2018) is a part of the SEA-SEIS project (Structure, Evolution And Seismicity of the Irish offshore) and will involve the deployment of 18 ocean-bottom-seismometers that will sink and install themselves at the bottom of the seafloor at depths of 1-4 km in the North Atlantic Ocean.
"The ocean-bottom sensors will record the tiny vibrations of the Earth caused by seismic waves, generated by earthquakes and by the ocean waves. As the waves propagate through the Earth's interior on their way to the seismic stations, they accumulate information on the structure of the Earth that they encounter. Seismologists know how to decode the wiggles on the seismograms to obtain this information. With it, we can do a 3D tomography scan of what's inside the Earth," explained Chief Scientist, Sergei Lebedev, DIAS
"With the advancement of how we are now using technology in the ocean, and having the capabilities of the Marine Institute's RV Celtic Explorer, will help us find out how the structure of the tectonic plate varies from across the North Atlantic. It will also provide us with invaluable information of what happens beneath the plates, as well as what causes earthquakes and how the ocean floor has formed," further said Sergei Lebedev,
Daniel Farrell of CoastMonkey.ie sponsored by DIAS and the Marine Institute, will be also be aboard to follow the scientists activities and report on the deployment of the seismometers via the RV Celtic Explorer's blog Scientist@Sea. "This is a fantastic and unique opportunity to join the SEA-SEIS project and I am looking forward to sharing first-hand what it's like being on a research vessel such as the RV Celtic Explorer. I have a passion for the sea, and will be filming the scientists, writing content for the blog as well as taking photos of all of the activities where everyone can keep up to date with what is happening," Daniel said.
"As part of the missions science outreach programme, the SEA-SEIS project team are engaging with the schools while they are at sea. There is a range of resources and videos at SEA-SEIS website: https://sea-seis.ie/ that teachers can use. The SEA-SEIS team have also organised a range of activities that both primary and secondary schools can take part in over the next couple of months. There are teaching resources and lesson plans from the Explorers Education Programme, as well as some great competitions involving a drawing competition and composing a rap song," added Daniel Farrell.
The DIAS OBS deployment survey is part of a new project "Structure, evolution and seismic hazard of the Irish offshore," funded by SFI, Marine Institute and the Geological Survey Ireland and started on the 1st March, 2018. This deployment survey is also made possible by the establishment of the SFI-funded Insitu Marine Laboratory for Geosystems Research (iMARL), which is providing the 18 new, broadband, ocean-bottom seismometers.