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.
iCRAGorama's team has just set sail aboard the @ClimPoro scientific cruise! We'll be doing seismic surveys and outreach. Follow our work on the PORO-CLIM YouTube channel: youtube.com/channel/UCeC6T…. Back in IE in June! In the meantime: Next episode on 20th May! Retweeted by
DIAS Geophysics
1/2 There was a slight change in the seismic tremor measurements at #Fagradalsfjall shortly before 4:30 am. Rhythm had been the same until then, approx. 10 min between magma jets. But this morning about half an hour passed between powerful magma jets. #eruption#ReykjanesRetweeted by
DIAS Geophysics
The PORO-CLIM team is composed of researchers, post-doctoral & PhD students, marine technicians & engineers, and marine mammal observers from various universities, research institutions, and agencies. We're looking forward to introducing you to everyone over the next few weeks! Retweeted by
DIAS Geophysics
If you're a geoscientist that wants to learn Python or R, you're in luck! There's a seriously large number of brand new hands-on tutorials on the @swung_org YouTube channel >> youtube.com/c/SoftwareUnde…Retweeted by
DIAS Geophysics
Check out the new website for the DIG project!
dig-geothermal.ie
DIG (De-risking Ireland’s Geothermal energy potential) is a major new research project which will investigate Ireland’s geothermal potential.
@SEAI_ie@GeolSurvIE@DIAS_Dublin#DIASdiscovers
Extremely grateful to be asked by @PietaHouse as one of the 6 Irish artists to donated an image to be used as virtual meeting backgrounds to help promote Darkness Into Light on the May 8th. darknessintolight.ie
Taken at Lough Ennell, Dysart, Co. Westmeath Retweeted by
DIAS Geophysics
Anyone interested in geothermal energy in Ireland? Yes IRELAND, that's not a typo. Visit our talk at #vEGU21 for info on low enthalpy geothermal, insights from seismic tomography and joint geophysical petrological inversions. meetingorganizer.copernicus.org/EGU21/EGU21-53…Retweeted by
DIAS Geophysics
Was a pleasure to welcome an Tánaiste to DIAS & Dunsink Observatory today.
We're delighted he has an interest in the educational, research as well as recreational possibilities Dunsink offers.
We look forward to working with him on these in the future.
#DIASdiscoverstwitter.com/LeoVaradkar/st…Retweeted by
DIAS Geophysics
The urgency of bringing climate action to the forefront is a challenge which the creative sectors have a vital role to play in.
Do you have a theatre, film or dance project which communicates this challenge?
Apply for the Creative Climate Action fund:
creativeireland.submit.com/show/1Retweeted by
DIAS Geophysics
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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
iCRAGorama's team has just set sail aboard the @ClimPoro scientific cruise! We'll be doing seismic surveys and outreach. Follow our work on the PORO-CLIM YouTube channel: youtube.com/channel/UCeC6T…. Back in IE in June! In the meantime: Next episode on 20th May! Retweeted by DIAS Geophysics
1/2 There was a slight change in the seismic tremor measurements at #Fagradalsfjall shortly before 4:30 am. Rhythm had been the same until then, approx. 10 min between magma jets. But this morning about half an hour passed between powerful magma jets. #eruption #Reykjanes Retweeted by DIAS Geophysics
Good luck to all setting sail on the #RVCelticExplorer today as part of the @ClimPoro project! dias.ie/2021/05/06/bir… @DIAS_Dublin @RVMarineInst @MarineInst @eurofleets #DIASdiscovers
Learn more about the SFI STEAM Art Collaboration and how to register here: rte.ie/learn/home-sch… @RTEjr @cormacgahon @aimeestapleton @ShevaunDoherty @connect_ie @EdDevane @LeroNews @mjamullins @iCRAGcentre @EoghanJDaly @DrMarkyC @Futureneuro_ie @Pharmabiotic @cristinareschke Retweeted by DIAS Geophysics
What do researchers bring for 25 days at sea? Here’s a look into what a few of our crew members have packed in their bags for #POROCLIM! @MarineInst @eurofleets Retweeted by DIAS Geophysics
I've really enjoyed serving as a judge for the @DIAS_Dublin 'Reach for the Stars' #astrophotography competition (sponsored by @helloalicepr). The online public vote is running until Sunday night. View all the beautiful shortlisted images & vote now! alicepr.com/featured/publi… Retweeted by DIAS Geophysics
The PORO-CLIM team is composed of researchers, post-doctoral & PhD students, marine technicians & engineers, and marine mammal observers from various universities, research institutions, and agencies. We're looking forward to introducing you to everyone over the next few weeks! Retweeted by DIAS Geophysics
If you're a geoscientist that wants to learn Python or R, you're in luck! There's a seriously large number of brand new hands-on tutorials on the @swung_org YouTube channel >> youtube.com/c/SoftwareUnde… Retweeted by DIAS Geophysics
Check out the new website for the DIG project! dig-geothermal.ie DIG (De-risking Ireland’s Geothermal energy potential) is a major new research project which will investigate Ireland’s geothermal potential. @SEAI_ie @GeolSurvIE @DIAS_Dublin #DIASdiscovers
Excellent coverage by @ScienceSpinning of our researchers based in @dias_geophysics on the origin of Love waves 🌎 twitter.com/ScienceSpinnin… Retweeted by DIAS Geophysics
Irish researchers find the origin of seismic ‘Love waves’ irishtimes.com/news/science/i… via @IrishTimes @DIAS_Dublin @dias_geophysics @iCRAGcentre #seismology Retweeted by DIAS Geophysics
During a private visit to @DIASDunsink, Tánaiste @LeoVaradkar launched the online public vote to choose Ireland’s best astrophotography images received for our ‘Reach for the Stars’ competition. See all the entries and cast your vote now: dias.ie/astrophotograp… #DIASdiscovers Retweeted by DIAS Geophysics
Extremely grateful to be asked by @PietaHouse as one of the 6 Irish artists to donated an image to be used as virtual meeting backgrounds to help promote Darkness Into Light on the May 8th. darknessintolight.ie Taken at Lough Ennell, Dysart, Co. Westmeath Retweeted by DIAS Geophysics
Anyone interested in geothermal energy in Ireland? Yes IRELAND, that's not a typo. Visit our talk at #vEGU21 for info on low enthalpy geothermal, insights from seismic tomography and joint geophysical petrological inversions. meetingorganizer.copernicus.org/EGU21/EGU21-53… Retweeted by DIAS Geophysics
iCRAG is exhibiting at #vEGU21 @EuroGeosciences this week. Come visit us in the exhibitor hall 12-13:00 CEST each day webforms.copernicus.org/EGU21/views/ex… 🌎 Retweeted by DIAS Geophysics
Register for @SEAI_ie Energy Show 2021 to hear @GeothermalAssoc briefing showcasing #geothermal #projects & news is Ireland @NSAI_Standards @iCRAGcentre @GsiGroundwater @dias_geophysics #GDGeosolutions @GroupSirus @TerraGeoServ @GEO4CIVHIC @MuseGeoera twitter.com/SEAI_ie/status… Retweeted by DIAS Geophysics
Was a pleasure to welcome an Tánaiste to DIAS & Dunsink Observatory today. We're delighted he has an interest in the educational, research as well as recreational possibilities Dunsink offers. We look forward to working with him on these in the future. #DIASdiscovers twitter.com/LeoVaradkar/st… Retweeted by DIAS Geophysics
The urgency of bringing climate action to the forefront is a challenge which the creative sectors have a vital role to play in. Do you have a theatre, film or dance project which communicates this challenge? Apply for the Creative Climate Action fund: creativeireland.submit.com/show/1 Retweeted by DIAS Geophysics
Happy #EarthDay21! Lets take care of it together 🌎♥️ Retweeted by DIAS Geophysics
Did you know that in Roman mythology, Tellus was the goddess of the #Earth? Happy #EarthDay #EarthDay2021 @GeolSurvIE Retweeted by DIAS Geophysics