Find a summary of my publications below:
Earthquakes and Tremor Linked to Seamount Subduction During Shallow Slow Slip at the Hikurangi Margin, New Zealand
Erin K. Todd, Susan Y. Schwartz, Kimihiro Mochizuki, Laura M. Wallace, Anne F. Sheehan, Spahr C. Webb, Charles A. Williams, Jenny Nakai, Jefferson Yarce, Bill Fry, Stuart Henrys, Yoshihiro Ito
2018, Journal of Geophysical Research Letters - Solid Earth
Offshore tectonic tremor localises at subducted seamounts during and immediately following the 2014 Gisborne SSE
Stresses from seamount subduction dominate megathrust slow slip in producing seismicity and tremor
A wide range of slip processes occur on the plate interface in very close proximity to one another
GEOPHYSICAL CONSTRAINTS ON THE RELATIONSHIP BETWEEN SEAMOUNT SUBDUCTION, SLOW SLIP, AND TREMOR AT THE NORTH HIKURANGI SUBDUCTION ZONE, NEW ZEALAND
Daniel H. N. Barker, Stuart Henrys, Fabio Caratori Tontini, Philip M. Barnes, Dan Bassett, Erin Todd, and Laura Wallace
2018, Geophysical Research Letters
Seismic images reveal Hikurangi margin accretionary wedge architecture and seismic velocity distribution
Magnetic anomaly modelling shows seismic tremor focused on the landward flanks and downdip of subducting seamounts
Structural heterogeneity of the plate interface may influence the distribution of slow slip and tremor
Unknown faults under cities
Pilar Villamor, David J. A. Barrell, Andrew Gorman, B. Davy, B. Fry B, S. Hreinsdottir, I. Hamling, M. Stirling, S. Cox, N. Litchfield, A. Holt, Erin Todd, P. Denys, C. Pearson, C. Sangster, J. Garcia-Mayordomo, T. Goded, E. Abbott, C. Ohneiser, P. Lepine, and F. Caratori-Tontini
Natural Hazards Research Platform Contes 2015, Report published 2018 by GNS Science.
Key Questions and Motivation:
Could a similar earthquake sequence to the September 4, 2010 Darfield sequence occur in Dunedin City? Dunedin has a similar built environment to the one Christchurch had prior to 2010, and is known to have active faults nearby (the Akatore and Titri Faults). In this project we assessed whether these faults, or other active faults, could extend into the city.
Various lines of evidence indicate that the Akatore Fault does not extend into Dunedin City. We also discovered that the Titri Fault extends northwards and closer to the city than previously mapped, but it but it has buckled rather than broken the ground surface there.
A newly mapped and possibly active fault, the Kaikorai Fault, lies in the western part of the city. It is thought that this newly mapped fault would likely rupture together with the offshore Green Island Fault.
Tectonic tremor along the northern Hikurangi Margin, New Zealand, between 2010 and 2015
Erin K. Todd and Susan Schwartz
2016, Journal of Geophysical Research Letters - Solid Earth
Tectonic tremor associated with shallow offshore slow slip events along northern Hikurangi Margin
Tremor catalog for 2010 through 2015
Spatiotemporal relationship between slow slip, tremor, and earthquakes
The 2011 Northern Kermadec earthquake doublet and subduction zone faulting interactions
Erin K. Todd and Thorne Lay
2013, Journal of Geophysical Research Letters - Solid Earth
A large outer trench slope intraslab earthquake doublet (6 July 2011, Mw 7.6; 21 October 2011, Mw 7.4) occurred seaward of an interseismically-coupled region of the megathrust
The differing focal mechanisms (6 July: shallow normal faulting intraplate earthquake; 21 October deeper thrust faulting intraplate event) suggests the presence of a neutral bending plane in the subducting plate as it enters the Kermadec Trench
Both earthquakes were followed by intraslab and interplate aftershocks that suggest a static stress transfer between the outer trench slope and the shallow megathrust.