19 April 2018 – Seminar
When: 16:00 on Thursday, 19th April 2018
Where: DIAS, Geophysics Section, 5 Merrion Square, Dublin 2, (library)
Speaker: Andrew Schaeffer (Department of Earth and Environmental Sciences, University of Ottawa, Canada)
Title: Imaging the locked to slow slip zone in Cascadia: combining on-shore seismic data with OBS infrastructure to illuminate the seismic-aseismic transition.
Abstract:
At subduction zones, the deep seismogenic transition from a frictionally locked to steady sliding interface is thought to primarily reflect changes in rheology and fluid pressure, and is generally located offshore. The development of fluid pressures within a seismic low-velocity layer (LVL) remains poorly constrained due to the scarcity of dense, continuous onshore-offshore broadband seismic arrays. I present recent results imaging the subducting Juan de Fuca oceanic plate in northern Cascadia using onshore and OBS teleseismic data and find that the signature of the LVL does not extend into the locked zone. In the second part of my talk, I highlight the salient features of the recently funded pan-Canadian OBS Instrument Pool, the National Facility for Seismic Imaging (NFSI), and emphasize the impact this new facility will have on our understanding of fundamental tectonic processes spanning the continent.
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Last Updated: 20th April 2018 by Anna
2018-04-19 – Seminar by Andrew Schaeffer (University of Ottawa)
19 April 2018 – Seminar
When: 16:00 on Thursday, 19th April 2018
Where: DIAS, Geophysics Section, 5 Merrion Square, Dublin 2, (library)
Speaker: Andrew Schaeffer (Department of Earth and Environmental Sciences, University of Ottawa, Canada)
Title: Imaging the locked to slow slip zone in Cascadia: combining on-shore seismic data with OBS infrastructure to illuminate the seismic-aseismic transition.
Abstract:
At subduction zones, the deep seismogenic transition from a frictionally locked to steady sliding interface is thought to primarily reflect changes in rheology and fluid pressure, and is generally located offshore. The development of fluid pressures within a seismic low-velocity layer (LVL) remains poorly constrained due to the scarcity of dense, continuous onshore-offshore broadband seismic arrays. I present recent results imaging the subducting Juan de Fuca oceanic plate in northern Cascadia using onshore and OBS teleseismic data and find that the signature of the LVL does not extend into the locked zone. In the second part of my talk, I highlight the salient features of the recently funded pan-Canadian OBS Instrument Pool, the National Facility for Seismic Imaging (NFSI), and emphasize the impact this new facility will have on our understanding of fundamental tectonic processes spanning the continent.
Category: Geophysics, Geophysics Section News & Events
This work was to help towards the preservation of the Irish Language, to maintain it's continuity with the past, and was to become a resource for teachers to check pronunciation #DIASdiscovers #Irish #Irishlanguage #CelticStudies #Gaelic
The researchers used the International Phonetic Alphabet, slightly modified to represent vowels and consonants of living speech. At that time there were concerns over the deterioration of the Irish language due to the "overpowering influence of English"
Date: 02 June 1943 Paper: The Irish Press Synopsis: In 1943, a phonetic investigation led by Brian Ó Cuív, Risteárd B. Breathnach and Tomás de Bhaldraithe of DIAS would begin the first systematic scientific recording of the varied sounds of modern Gaelic speech.
Happy Birthday! twitter.com/thecelticist/s…
The papers were 1) Affine Field Theory: conservation identitites and relation to Weyl and Eddington 2)The Union of the three fundamental fields (Gravitation, Menson, Electromagnetism) Which went on to secure worldwide acclaim. #DIASdiscovers
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)
Available to buy on the DIAS bookshop: books.dias.ie/index.php?main… (5/5) #DIASdiscovers #celtic #studies #twopatricks
He spoke on "Palladius and Patrick". Palladius was the first bishop of the Christians of Ireland. (2/5)
He was known by his first name Patricius, which in later times would lead to confusion as he was succeeded by another apostle of the same name (Saint Patrick or Patricius in Latin). (3/5)
"In the lives of St. Patrick, the two saints are invariably fused into one", said Prof. O'Rahilly in his lecture. The lecture was a condensation from O’Rahilly’s book “The two Patricks: a lecture on the history of Christianity in fifth-century Ireland”. (4/5)
Date: 21st March 1942 Paper: The Irish Press Headline: Palladius and Patrick | School Of Celtic Studies Lecture Synopsis: The first public lecture under the auspices of the School of Celtic Studies was delivered in Trinity College by Professor T. F. O'Rahilly in 1942. (1/5)
As part of our ongoing participation in the @HistFest we decided to take a look into the Irish Newspaper Archives and see where DIAS made it into print over the last 80 years. There were so many articles, the hardest part was selecting what we would post. We hope you enjoy!
@AReillyFailte @CultureNight @VisitDublin Thanks Antoinette! Glad you enjoyed 😊
Big thank you to @MartinaPQuinn of @helloalicepr for moderating the discussion, and of course to our panel @NeasaMcG @CormacORafferty and @laoneill111
@CormacORafferty "to cut yourself off from fundamental research means you could miss out on some of the biggest ideas"
@laoneill "it's our job as researchers to keep reminding governments how important basic research is" "For Dev basic research being carried out in Ireland was a badge of pride"
@NeasaMcG Schrödinger's work in causality was not well received by the religious authorities at the time At the same time DIAS did have Catholic priests working on research projects in the early days, so there was not the conflict you might think between science and religion