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.
Leave a Comment
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
Great @thetimesIE article on recent findings on how plasma matter in the Sun’s atmosphere may hold the key to developing safe and efficient nuclear energy, a project that @petertgallagher, Head of the School of Astrophysics, collaborated on. Read - bit.ly/2WpQxr1
Some great coverage on DIAS's Postdoc scholar Eoin Carley's latest paper: "Irish scientists help unveil mystery of exotic matter in the sun's atmosphere" via @IrishTimes irishtimes.com/news/science/i…
Great to see Sergei Lebedev, Assistant Professor of Seismology at @dias_geophysics having his co-authored paper published in @NatureGeosci today! You can read the paper at: bit.ly/2Jqxoz2
What can black holes and quantum computers tell us about the other? This Wednesday at 7:15pm, in the Joly Lecture Theatre, @tcddublin Marika Taylor will present on this topic. This event is free but places must be booked at: bit.ly/2J64tzu. #DIASdiscovers
You're invited to join us for the @StpDias Statutory Public Lecture 2019 on 23 May 2019, 6pm by Prof. Don Zagier in @tcddublin. Prof. Zaigier will deliver an exciting look at 'Numbers, Knots, & Quantum Theory'. Info and tickets at: bit.ly/2JLsAUj #DIASdiscovers
As part of IQF 2019 on 22 May, Prof. Marika Taylor will explain what #BlackHoles might teach us about #QuantumComputing and conversely, what quantum theory implies about the fundamental properties of black holes. Register at bit.ly/2WuKgHo #DIASdiscovers
The annual Irish Quantum Foundations meeting will take place this year in @tcddublin on 23 & 24 May, bringing together Irish and international theoretical physicists who work fundamental theory and quantum foundations. More info and registration at maths.tcd.ie/~tristan/IQF20….
At last week's final #WhatIsLife lecture, Director of @StpDias Professor Werner Nahm contemplated the impact of Ada Yonath's work for the question 'what is life?' and tying into the impact and legacy of #Schrödinger. #DIASdiscovers
Martin Möllhoff, Director of Irish National Seismic Network spoke to @OceanFmIreland about yesterday's earthquake in Donegal. You can lsiten back at: oceanfm.ie/2019/04/30/ano… #DIASdiscovers
On Thursday, Werner Nahm had us 'thinking outside the box' at the fourth and final @DIAS_Dublin 'What is Life?' lecture series. The series commemorated the 75th anniversary of Erwin #Schrödinger's ground breaking series being published as a book. #DIASdiscovers
Another Earthquake recorded in Donegal by the Irish National Seismic Network. Magnitude 2.1. You can read more about it at tinyurl.com/y4bewx3h. #DIASdiscovers twitter.com/dias_geophysic…
If you haven't booked your place at today's lunchtime lecture from the @StpDias, exploring the legacy of Schrödinger’s 'What is Life?' lectures and book, do so now at: bit.ly/2KZStSH It's te final one lecture of the series. #DIASdiscovers
Don't miss the 4th and final lecture in our #WhatisLife series with Prof Werner Nahm, Director of @StpDias, looking at ‘Beyond the ‘What is Life?’ lectures and book’. This lecture, at 1pm tomorrow, will explore the legacy of Professor Erwin Schrödinger. bit.ly/2KZStSH