Thomas Garth

Thomas Garth

Postdoctoral Research Associate

Research Interests

I am a research associate in the seismology group at Oxford. My work primarily concerns using full waveform seismological techniques to learn more about the earthquake source. In collaboration with colleagues in Oxford and at the International Seismological Centre (ISC) I am working on new methods to improve constraints on earthquake mechanism, source time function and depth using tele-seismically observed seismic waveforms.

Full waveform Bayesian point source modelling

My main focus is on developing a new tool for the ISC that is able to produce moment tensor and source time function measurements with full uncertainty parameters. By accurate modelling of the full seismic wave field (including the surface reflected depth phases) we hope that these techniques will add additional depth constraints for remote, particularly shallow, earthquakes.

Subduction zone structure and seismicity

My previous research has focused on subduction zone seismicity and structure. This includes using innovative full waveform modelling tools to resolve new details of the Wadati-Benioff zone, using guided waves. I have also been involved in aftershock deployment after the 2010 Maule earthquake in Chile, and the 2016 Pedernales earthquake in Ecuador. More recently I have also contributed to the NERC funded Voila project, investigating volatile recycling and seismicity in the Lesser Antilles subduction zone.

Coulson S, Garth T, Rietbrock A, 2018; Velocity Structure of the Subducted Yakutat Terrane, Alaska: Insights From Guided Waves. Geophysical Research Letters. here

 

Garth T, Rietbrock A., 2017; Constraining the hydration of the subducting Nazca plate beneath Northern Chile using subduction zone guided waves. Earth and Planetary Science. here

 

Garth T, Rietbrock A., 2014; Downdip velocity changes in subducted oceanic crust beneath Northern Japan—insights from guided waves. Geophysical Journal International 198(3):1342-1358. here

 

Garth T, Rietbrock A., 2014; Order of magnitude increase in subducted H2O due to hydrated normal faults within the Wadati-Benioff zone. Geology 42(3):207. here

2019

 

van Driel et al 2019. Preparing for InSight: Evaluation of the Blind Test for Martian Seismicity, Seismological Research Letters, vol. 90, num. 4. https://pubs.geoscienceworld.org/ssa/srl/article-abstract/571434/Preparing-for-InSight-Evaluation-of-the-Blind-Test

 

Sergio León-Ríosa, Hans Agurto Detzel, Andreas Rietbrock, Alexandra Alvarado, Susan Beck, Phillipe Charvis, Benjamin Edwards, Yvonne Font, Tom Garth, Mariah Hoskins, Colton Lynner, Anne Meltzer, Jean Matthieu Nocquet, Marc Regnier, Frederique Rolandone, Mario Ruiz, Lillian Soto-Cordero. 1D-velocity structure and seismotectonics of the Ecuadorian margin inferred from the 2016 Mw7.8 Pedernales aftershock sequence. Tectonophysics, vol 767. https://www.sciencedirect.com/science/article/pii/S0040195119302665

 

2018

 

Bie L, Hicks S, Garth T, Gonzalez P, Rietbrock A; 2018. ‘Two go together’: Near-simultaneous moment release of two asperities during the 2016 Mw 6.6 Muji, China earthquake;  Earth and Planetary Science Letters vol. 491 pgs 34-42. https://www.sciencedirect.com/science/article/pii/S0012821X18301572

 

Coulson S, Garth T, Rietbrock A, 2018; Velocity Structure of the Subducted Yakutat Terrane, Alaska: Insights From Guided Waves. Geophysical Research Letters. https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2017GL076583

 

2017

 

Garth T, Rietbrock A., 2017; Constraining the hydration of the subducting Nazca plate beneath Northern Chile using subduction zone guided waves. Earth and Planetary Science. https://www.sciencedirect.com/science/article/pii/S0012821X17303576

 

2015

 

Atkinson M, Carpené M, Casarotti E, Claus S, Filgueira R, Frank A, Galea M, GARTH T, Gemünd A, Igel H et al. VERCE Delivers a Productive E-science Environment for Seismology Research,. 2015 IEEE 11th International Conference on e-Science (e-Science). https://arxiv.org/pdf/1510.01989.pdf

 

2014

 

Garth T, Rietbrock A., 2014; Downdip velocity changes in subducted oceanic crust beneath Northern Japan—insights from guided waves. Geophysical Journal International 198(3):1342-1358. https://academic.oup.com/gji/article/198/3/1342/585725

 

Garth T, Rietbrock A., 2014; Order of magnitude increase in subducted H2O due to hydrated normal faults within the Wadati-Benioff zone. Geology 42(3):207. https://pubs.geoscienceworld.org/gsa/geology/article/42/3/207/131497/order-of-magnitude-increase-in-subducted-h2o-due