This research area investigates the structure and dynamics of the deep Earth, from its crust to its core. Seismic waves generated by distant global earthquakes, are used to study wave propagation by applying tomographic methods that are similar to medical imaging techniques. These yield information about the chemical and thermal state of the Earths crust and mantle and the tectonic processes that operate deep within the Earth that are responsible for the growth and deformation of continents and oceans. In addition to global-scale seismic imaging investigations of the Irish and European lithosphere using locally deployed seismic instruments are also undertaken. A permanent array of seismic instruments is also deployed across Ireland to monitor seismic activity on land and the surrounding offshore. One particular focus of this global research theme is the North Atlantic lithosphere between western Europe and eastern North America. This is strongly related to and complimentary to the Marine Geophysics research theme.
GLOBAL TOMOGRAPHY
Seismic stations around the world record the tiny vibrations of the Earth’s surface caused by earthquakes thousands of kilometers away. Recordings of these vibrations (seismograms) enable seismologists to perform seismic tomography, or 3D imaging of the Earth’s deep interior. This image below shows variations of seismic velocities at a 100-km depth in the Earth’s mantle. High velocities indicate low temperatures, most noticeable within the cold, thick tectonic plates of the ancient cores of continents (cratons). Low velocities indicate high temperatures or partial melting of the rock, such us beneath the mid-ocean ridges where new oceanic crust is formed.
Some recent research by DIAS Geophysics scientists, with major impact internationally:
Schaeffer, A. J. and S. Lebedev, Global shear-speed structure of the upper mantle and transition zone. Geophys. J. Int., 194 (1), 417-449, 2013. doi:10.1093/gji/ggt095 [Link]
Ireland Array is a new array of broadband seismic stations deployed across Ireland by DIAS Geophysics The backbone component of the array is formed by 20 stations, equipped with Trillium 120PA seismometers and distributed uniformly across Ireland. These 20 stations have been installed in 2010 – 2012 and will be deployed for 5 years. Deployments of additional 15 stations (each with a Guralp 40T seismometer) are used to complement the backbone-component coverage and to target fine structure of the subsurface in specific target areas.
Ireland Array is a major new geophysical facility, producing abundant seismic data. It will reveal Ireland’s deep structure and evolution in unprecedented detail. Ireland Array will also underpin geothermal energy research by illuminating in detail the structure of Ireland’s crust and entire lithosphere. New insight into 3-D regional lithospheric structure and evolution will also benefit basin-evolution research, relevant for hydrocarbon exploration. Yet another target of Ireland Array will be Ireland’s seismicity, modest but insufficiently understood at present. Ireland Array invites collaborations with Earth scientists in Ireland, as well as abroad, and is aimed to benefit the entire community. For more details click here.
Hey @ORB_KSB!
I made espresso while talking about research led by you!
Earth grew quiet during COVID19 lockdown.
Researchers could now listen to previously concealed earthquake signals = better early-warning for natural disasters in future.
researchstoryteller.com/espressoknowle…#scicommRetweeted by
DIAS Geophysics
EGU's #Equality#DiversityandInclusion working group is looking for new volunteer members!
Do you want to influence change in the way that EGU approaches equity and accessiblity issues in the future? Come join us!
Find out more and apply by 21 October: egu.eu/8MBVW7/Retweeted by
DIAS Geophysics
Date: 01 December 1943
Paper: The Irish Press
Headline: Two Papers by Dr. Schroedinger
Synopsis: 1943 was a busy year for Schroedinger. Not only did he deliver the "What is Life?" Lectures in @tcddublin in February in November he delivered two papers in the @RIAdawson (1/2) Retweeted by
DIAS Geophysics
Global and Local Seismology
This research area investigates the structure and dynamics of the deep Earth, from its crust to its core. Seismic waves generated by distant global earthquakes, are used to study wave propagation by applying tomographic methods that are similar to medical imaging techniques. These yield information about the chemical and thermal state of the Earths crust and mantle and the tectonic processes that operate deep within the Earth that are responsible for the growth and deformation of continents and oceans. In addition to global-scale seismic imaging investigations of the Irish and European lithosphere using locally deployed seismic instruments are also undertaken. A permanent array of seismic instruments is also deployed across Ireland to monitor seismic activity on land and the surrounding offshore. One particular focus of this global research theme is the North Atlantic lithosphere between western Europe and eastern North America. This is strongly related to and complimentary to the Marine Geophysics research theme.
GLOBAL TOMOGRAPHY
Seismic stations around the world record the tiny vibrations of the Earth’s surface caused by earthquakes thousands of kilometers away. Recordings of these vibrations (seismograms) enable seismologists to perform seismic tomography, or 3D imaging of the Earth’s deep interior. This image below shows variations of seismic velocities at a 100-km depth in the Earth’s mantle. High velocities indicate low temperatures, most noticeable within the cold, thick tectonic plates of the ancient cores of continents (cratons). Low velocities indicate high temperatures or partial melting of the rock, such us beneath the mid-ocean ridges where new oceanic crust is formed.
Some recent research by DIAS Geophysics scientists, with major impact internationally:
Schaeffer, A. J. and S. Lebedev, Global shear-speed structure of the upper mantle and transition zone. Geophys. J. Int., 194 (1), 417-449, 2013. doi:10.1093/gji/ggt095 [Link]
To download the SL2013sv model [Link]
IRELAND ARRAY
Ireland Array is a new array of broadband seismic stations deployed across Ireland by DIAS Geophysics The backbone component of the array is formed by 20 stations, equipped with Trillium 120PA seismometers and distributed uniformly across Ireland. These 20 stations have been installed in 2010 – 2012 and will be deployed for 5 years. Deployments of additional 15 stations (each with a Guralp 40T seismometer) are used to complement the backbone-component coverage and to target fine structure of the subsurface in specific target areas.
Ireland Array is a major new geophysical facility, producing abundant seismic data. It will reveal Ireland’s deep structure and evolution in unprecedented detail. Ireland Array will also underpin geothermal energy research by illuminating in detail the structure of Ireland’s crust and entire lithosphere. New insight into 3-D regional lithospheric structure and evolution will also benefit basin-evolution research, relevant for hydrocarbon exploration. Yet another target of Ireland Array will be Ireland’s seismicity, modest but insufficiently understood at present. Ireland Array invites collaborations with Earth scientists in Ireland, as well as abroad, and is aimed to benefit the entire community. For more details click here.
Geophysics
Dark side of science and Celtic civilisation to feature in Halloween festival siliconrepublic.com/innovation/dia… Retweeted by DIAS Geophysics
Tonight! As part of @mathsweek we will present an online talk that delves into Einstein's theory of relativity! Some tickets remaining eventbrite.ie/e/einsteins-re… #DIASdiscovers Retweeted by DIAS Geophysics
Its Maths Week! And we have some tickets left for our upcoming talk tomorrow evening: eventbrite.ie/e/122552924095 #MathsWeek2020 #DIASdiscover Retweeted by DIAS Geophysics
Our Samhain agus Science mini-festival line-up has just been announced! mailchi.mp/b70245676af4/l… #DIASdiscovers #samhain #science #online Retweeted by DIAS Geophysics
Minister @SimonHarrisTD is delighted to launch #ScienceWeek. @scienceirel Find out more here: gov.ie/en/press-relea… Retweeted by DIAS Geophysics
Small but interesting #earthquake so close to coast. Extensive fault control of offshore basins up the Irish Sea & older faulted geology onshore too @GeolSurvIE twitter.com/dias_geophysic… Retweeted by DIAS Geophysics
M1.3 #earthquake on 17th September 17:31:40 UTC offshore Skerries, N. Dublin. Confirmed by INSN operated by @DIAS_Dublin in cooperation with @GeolSurvIE. Details tinyurl.com/y3zqke8f @k_verbruggen @BGSseismology
Chuffed to be one of the selected artists in “The Sky is Blue", @VisualCarlow on the theme of Climate and our Natural Environment. Some great works to see until 18th October #johntyndall @wonderscape @glassboxproject @_mark_joyce Retweeted by DIAS Geophysics
#Seismographs record more than just #earthquakes. What have you picked up on yours? Share your interesting recordings with @raspishake & @IRIS_EPO! Remember to tell us the Shake source, your city & device location, and use the tag #WhatsTheWiggle – What’s Shaking on yours?! Retweeted by DIAS Geophysics
Shout out to the amazing group of scientists involved in this work! @seismotom @seismo_steve @Koen_VanNoten @seismo_koel @Raphael_DePlaen @ZAMG_AT @jdassink @flaviocannavo @sebacarquake @CoCaudron @SeisCROv @seismodave @dias_geophysics @StephenHicks @OlivierdenOuden @JDiazCusi Retweeted by DIAS Geophysics
Hey @ORB_KSB! I made espresso while talking about research led by you! Earth grew quiet during COVID19 lockdown. Researchers could now listen to previously concealed earthquake signals = better early-warning for natural disasters in future. researchstoryteller.com/espressoknowle… #scicomm Retweeted by DIAS Geophysics
EGU's #Equality #DiversityandInclusion working group is looking for new volunteer members! Do you want to influence change in the way that EGU approaches equity and accessiblity issues in the future? Come join us! Find out more and apply by 21 October: egu.eu/8MBVW7/ Retweeted by DIAS Geophysics
Researchers have identified a previously unknown large #volcanic-intrusive complex located about 15 km off the coast of #Calabria #Italy, which formed within the past 780,000 years! @AGU_Eos ➡️ buff.ly/2UP3NCg Retweeted by DIAS Geophysics
We are seeking to appoint 2 Marine Leaders into the roles of (1) Director of Fisheries & Ecosystem Advisory Services (2) Director of Marine Environment & Food Safety Services #marine #director #jobfairy #fisheries #ecosystem #environment #foodsafety bit.ly/2SlH54x Retweeted by DIAS Geophysics
GI is delighted to have endorsed @EU_ERMA which was launched yesterday! ERMA provides a platform for Gov, R&D, industry and society to collaborate in ensuring that Europe can safely develop its own mineral resources. #minex #criticalrawmaterials #minex geoscience.ie/8189-2/ Retweeted by DIAS Geophysics
#GeoMovieCup Day 4, here are 4 new candidates for "The best of the worst geo movies", keep on voting😉 #GeoMovieCup Round 1 Group 4 Retweeted by DIAS Geophysics
The best of the worst geo movies: #GeoMovieCup Round 1 Retweeted by DIAS Geophysics
David Stalling’s ‘Palace of Ships’, created as part of the Aerial/Sparks Galway2020 project. See more on the project, which is taking place on Inis Oírr until 27 September here…aerialsparks.org @louisemanifold1 @MarineInst @DStallingSound #Galway2020 #AerialSparks Retweeted by DIAS Geophysics
Date: 01 December 1943 Paper: The Irish Press Headline: Two Papers by Dr. Schroedinger Synopsis: 1943 was a busy year for Schroedinger. Not only did he deliver the "What is Life?" Lectures in @tcddublin in February in November he delivered two papers in the @RIAdawson (1/2) Retweeted by DIAS Geophysics
Ready for Culture Night today evening. @DIASDunsink @DIAS_Dublin @RCPCA1 @Fingalcoco @opwireland @petertgallagher @jm_astro @cm_jackman @drsophiemurray Retweeted by DIAS Geophysics