Plate tectonics and marine hazards

Dynamic processes beneath the seafloor can cause natural hazards (such as earthquakes, landslides, tsunamis, and volcanic eruptions) that affect people living in coastal areas. A better understanding of the processes involved in the movement of tectonic plates is required in order to assess these hazards and to identify the early warning signals that precede such natural disasters.

News for topic: Plate tectonics annd marine harzards

35 million years ago, an asteroid struck the east coast of North America. Ejected material from the impact site was distributed over an area of at least 7 million square kilometres (Tektite field). In drilling samples taken from the sea floor 400 kilometres from the point of impact (ODP 1073), researchers have now found clear traces of the impact and dated them for the first time using the uranium-thorium-helium technique. Image reproduced from the GEBCO world map 2014, www.gebco.net
26.07.2019

Space exploration on the sea floor

Traces of an extraterrestrial impact event detected in marine sediments

Along the North Anatolian Fault, Anatolia and the Eurasian Earth Plate push past each other. Image reproduced from the GEBCO world map 2014, www.gebco.net
08.07.2019

Istanbul: Seafloor study proves earthquake risk for the first time

GeoSEA sensors document tectonic strain build-up below the Sea of Marmara

The research vessel SONNE in front of Ritter Island during the expedition SO252 in autumn 2016. Photo: Christian Berndt/GEOMAR
16.05.2019

Precursors of a Catastrophic Collapse

Ritter Island gives new insights into the dynamics of volcanic landslides

The participants of the expedition SO267 and the research vessel SONNE shortly before leaving the port of Suva (Fiji). Photo: Philipp Brandl + Nico Augustin/GEOMAR
10.12.2018

Christmas in the Western Pacific

Kiel Marine Scientists investigate the birthplace of a continent with RV SONNE

In spring 2016, a team from GEOMAR and Kiel University on board the research vessel POSEIDON installed the GeoSEA transponders on the eastern flank of Mount Etna. Photo: Felix Gross (CC BY 4.0)
10.10.2018

GeoSEA array records sliding of Mount Etna’s southeastern flank

Volcano flank moves under water – Tsunami is a possible consequence

Area of investigation at the Cayman Trough in the Caribbean. Graphics. Ingo Grevemeyer/GEOMAR
24.05.2018

Cold Production of New Seafloor

First seismic evidence for mantle exhumation at an ultraslow-spreading centre

Gas hydrates are nicknamed "burning ice" because of the trapped methane. Photo: Science Party SO174
23.03.2018

Gas hydrate research: Advanced knowledge and new technologies

After ten years, the SUGAR project concludes with a conference in Potsdam

Schematic evolution of retrogressive slope failure due to overpressured gas below the gas haydrate stability zone (GHSZ): a submarine slope with gas hydrate-bearing sediments  and overpressured gas (bright area) at the bottom of the GHSZ induces pipe generation into the GHSZ,  the conduit encounters a permeable layer; gas enters and leads to overpressure transfer from the bottom of the GHSZ to the shallow subsurface, and finally overpessured gas causes shear banding in the weak layer and generates retrogressive slope failure.
20.02.2018

Stable gas hydrates can trigger landslides

"Cement of continental slopes" effect slope stability differently than previously thought

In summer 2017 30 ocean bottom seismometers were deployed from the French research vessel POURQUOI PAS? into the Ligurian Sea. During the current journey, they are recovered to evaluate the recorded data. Picture: Catherine Prequegnat/CNRS
05.02.2018

Alpine research in the Deep Sea – how does that fit together?

GEOMAR investigates the ‘Ligurian Knot’ as part of the AlpArray project

The Nazca plate moves eastwards with a rate of 6.6 cm per year. Off the Chilean coast it collides with the South American plate and is submerged beneath it. In this process, strains build up between the plates - until they break and the earth trembles. Image reproduced from the GEBCO world map 2014, www.gebco.net
13.12.2017

Residual Strain despite Mega Earthquake

Even the strongest quake ever measured left energy for successors