How climate change triggered a landslide tsunami in a Greenland fjord, vibrating Earth for 9 days Stephen Hicks - Seismologist 2024-09-12 | Climate change is increasingly exposing polar regions to large landslides. Tsunamigenic landslides have occurred recently in Greenland, but none have been reported from the eastern fjords. In September 2023, we detected the start of a 9-day-long global 10.88 mHz (92 s) monochromatic very-long period (VLP) seismic signal, originating from East Greenland. We demonstrate how this event started with a 25 M m3 glacial thinning-induced rockslide plunging into Dickson Fjord, triggering a 200 m high tsunami. Simulations show the tsunami stabilized into a 7 m-high long-duration seiche with a near-identical frequency (11.45 mHz) and slow amplitude decay as the seismic signal. An oscillating, fjord-transverse single-force reproduces the seismic amplitudes and their radiation pattern relative to the fjord, demonstrating how a seiche directly caused the 9-day long seismic signal. Our findings highlight how climate change is causing cascading, hazardous feedbacks between the cryosphere, hydrosphere and lithosphere. The study was conducted by Svennevig et al. (2024) and published in Science. The paper is available here: science.org/doi/10.1126/science.adm9247 (and without the paywall here: drive.google.com/file/d/15HhsNkMb9x9Qc5wNWMNTzvLYceIXo04Z/view?usp=sharing).Music credit: "Seiche" by Isabelle Ryder (youtube.com/watch?v=H1xh1Pf5JvU; https://isabellerydermusic.weebly.com).
Stephen Hicks - Greenland tsunami-landslide study - BBC Radio 4 World at One live interview Stephen Hicks - Seismologist 2024-09-27 | From 13 September 2024
Seismic & tsunami waves from the September 2023, Dickson Fjord, Greenland landslide & fjord seiche Stephen Hicks - Seismologist 2024-09-12 | For a detailed explanation, please see this video by the same author: youtube.com/watch?v=60T9TKuuujs.The left panel shows a ground motion visualisation, showing the seismic wave from the Greenland seiche spreading out around the planet. Each circle shows the data from an individual seismic monitoring station. The right panel shows a numerical simulation of the 16 September 2023 tsunami and seiche in Dickson fjord, showing the initial tsunami stabilising into a fjord-transverse sloshing backwards and forwards every 90 seconds, which lasts for over 9 days. The sloshing of the water transfers momentum into Earth's crust, generating the globally-observed seismic signal.These results come from a paper published in Science on 12 September 2023: http://www.science.org/doi/10.1126/science.adm9247. (Or without the paywall here: drive.google.com/file/d/15HhsNkMb9x9Qc5wNWMNTzvLYceIXo04Z/view?usp=sharing).Music credit: "Seiche" by Isabelle Ryder (youtube.com/watch?v=H1xh1Pf5JvU; https://isabellerydermusic.weebly.com).Aimation credit: Stephen Hicks; Kristian Svennevig; Thomas Lecocq; Alexis Marbeouf.
Multivariate statistical appraisal of regional susceptibility to induced seismicity Stephen Hicks - Seismologist 2021-12-08 | Application to the Permian Basin, SW United States.Fully open-access paper: agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2021JB022768
Temporary seismometer installations in Surrey 2018 Stephen Hicks - Seismologist 2018-07-16 | Brief explanation of the temporary seismometer installations in southern Surrey, UK to better monitor the recent seismic swarm in 2018.
Earthquakes in the Papua New Guinea / New Britain subduction zone Stephen Hicks - Seismologist 2017-12-14 | ...
VOiLA Ocean Bottom Seismometer recovery Stephen Hicks - Seismologist 2017-05-25 | Retrieval of an ocean bottom seismometer from 4000 m depth in the Caribbean Sea. Part of a scientific project to understand Earth's water cycle within tectonic plates.More details on the project: www.voila.ac.uk
VOiLA project - ocean bottom seismometer recovery - underwater view Stephen Hicks - Seismologist 2017-05-17 | ...
Computer simulation of the 2010 M8.8 Maule, Chile earthquake Stephen Hicks - Seismologist 2015-02-18 | Simulation shows the passage of seismic waves from the 2010 magnitude 8.8 Maule, Chile earthquake causing the ground to shake (shown in the animation as shaking velocity). The white lines show the coastline and Chile trench.Simulation was calculated on the UK Research Council's Archer high performance computing cluster. Research funded by the Natural Environment Research Council (NERC).Simulation was made using the SPEFEM3D wave propagation algorithm. Rupture model from Anthony Sladen (California Institute of Technology): http://tectonics.caltech.edu/slip_history/2010_chile/index.html. Seismic wave propagation is carried out in the 3-D velocity model of Hicks et al. (2014), Earth Planet. Sci. Lett.
Listen to the Jan 2015 M3.8 Oakham earthquake Stephen Hicks - Seismologist 2015-01-29 | Quake, Rattle and Roll! See how aseismic waves from a UK earthquake rattle across the country.We convert the seismogram signals (from the British Geological Survey's monitoring network) and convert them into audible frequencies by speeding up the records by 30 times.
Pacific Dolphins at sunset Stephen Hicks - Seismologist 2014-09-25 | Cascadia Initiative Leg 6 - September 2014
Ocean bottom seismometer recovery Stephen Hicks - Seismologist 2014-09-23 | Cascadia Initiative - Leg 6 - September 2014
Deploying a seismometer to the bottom of the Pacific Ocean Stephen Hicks - Seismologist 2014-09-12 | Leg 6 cruise of the Cascadia Initiative to understand earthquake hazard along the Pacific Northwest coast of the Uniter States.
UK Earthquakes since 1970 Stephen Hicks - Seismologist 2014-02-21 | See earthquakes dance!This is an animation of all earthquakes recorded in the UK since 1970. Earthquake locations are from the British Geological Survey (http://www.earthquakes.bgs.ac.uk/earthquakes/dataSearch.html).This movie was created by Stephen Hicks at the Liverpool Tectonic Observatory (University of Liverpool).
