Haro Strait Sunrise

Group members:

Sarah Jaye Oliva
Jinrui Liu
Theron Finley
Israporn Sethanant
Fengzhou Tan
Peter Blenman
Siyu Wang
Guy Salomon
Yijie Zhu
Roger Stephen

Group affiliates:

We collaborate with a number of UVic-affiliated researchers at the Geological Survey of Canada, based at the nearby Pacific Geoscience Center in Sidney, BC. These include Kelin Wang (subduction zone geodynamics; earthquake cycle modelling), Honn Kao (earthquake source characterization; induced seismicity), John Cassidy (earthquake seismology; seismic hazard assessment), and Andrew Schaeffer (earthquake seismology; Earth structure).

We also work closely with other UVic faculty, including Lucinda Leonard (regional tectonics; seismic and tsunami hazard assessment); Ruohong Jiao (low-temperature thermochronology; mountain building; landscape evolution); and Chris Bone at UVic Geography (lidar and UAV-based remote sensing).

Post-doctoral researchers

Sarah Jaye Oliva

Dr. Sarah Jaye Oliva

Sarah has just joined the group as an inaugural Hess Postdoctoral Fellow working with Ed and Andrew Schaeffer. She is using waveform modelling to investigate the structure and seismicity beneath and offshore Haida Gwaii.

Sarah's published articles include:

•  Oliva, S.J., Ebinger, C.J., Rivalta, E., Williams, C.A., Wauthier, C. and Currie, C.A. (2022). State of stress and stress rotations: Quantifying the role of surface topography and subsurface density contrasts in magmatic rift zones (Eastern Rift, Africa). Earth and Planetary Science Letters, 584, 117478.

•  Oliva, S.J., Ebinger, C.J., Wauthier, C., Muirhead, J.D., Roecker, S.W., Rivalta, E. and Heimann, S. (2019). Insights into fault-magma interactions in an early-stage continental rift from source mechanisms and correlated volcano-tectonic earthquakes. Geophysical Research Letters, 46, 2065-2074.

Sarah's awards:  Dr Margaret Perkins Hess Research Fellowship in Earth, Ocean, Astronomy and Environmental Sciences (UVic; 2022-2024)

Ph.D. Students

Theron Finley

Theron Finley

Theron is studying the active tectonics of Cascadia and Yukon using a variety of techniques including remote sensing, geodesy, seismology, and field investigation. He is co-supervised with John Cassidy at the Pacific Geoscience Center and is supported by the prestigious Alexander Graham Bell Canada Graduate Scholarship from NSERC.

Theron's published articles include:

•  Finley, T., Salomon, G., Stephen, R., Nissen, E., Cassidy, J. and Menounos, B. (2021). Preliminary results and structural interpretations from drone lidar surveys over the Eastern Denali fault, Yukon. In: Yukon Exploration and Geology 2021 K.E. MacFarlane (ed.), Yukon Geological Survey, p. 83–105.

•  Finley, T., Morell, K., Leonard, L., Regalla, C., Johnston, S.T. and Zhang, W. (2019). Ongoing oroclinal bending in the Cascadia forearc and its relation to concave-outboard plate margin geometry. Geology, 47, 155-158.

Theron's awards:  Alexander Graham Bell Canada Graduate Scholarship (NSERC; 2020-2023), President’s Research Scholarship (UVic; 2020, 2021)

Élyse Gaudreau

Élyse Gaudreau

Élyse is working on imaging large earthquake ruptures in space and time using InSAR data and modelling, satellite optical image correlation, and back-projection seismology. Élyse is supported by an Alexander Graham Bell Canada Graduate Scholarship from NSERC.

Élyse's published articles include:

•  Gaudreau, É., Hollingsworth, J., Nissen, E. and Funning, G.J. Complex 3-D surface deformation in the 1971 San Fernando, California earthquake reveals static and dynamic controls on off-fault deformation. In review, Journal of Geophysical Research: Solid Earth

•  Gaudreau, É., Nissen, E., Bergman, E. A., Benz, H., Karasözen, E., and Tan, F. (2019). The August 2018 Kaktovik earthquakes: active tectonics in northeastern Alaska revealed with InSAR and seismology. Geophysical Research Letters, 46.

•  Gaudreau, É., Audet, P., and Schneider, D.A. (2019). Mapping Curie Depth Across Western Canada From a Wavelet Analysis of Magnetic Anomaly Data. Journal of Geophysical Research: Solid Earth, 124, 4365-4385.

•  Gaudreau, É., Schneider, D., Lagroix, F., Cossette, E., and Grasemann, B. (2017). Controls and implications of anisotropy across a strain gradient within granodiorite, Serifos, Greece. Journal of Geodynamics, 105, 11-26.

Élyse's awards:  Alexander Graham Bell Canada Graduate Scholarship (NSERC; 2019-2022), Montalbano Scholars Fellowship (UVic; 2019, 2020, 2021),
      President’s Research Scholarship (UVic; 2019, 2020, 2021), Graduate Entrance Award (UVic; 2018)

Jinrui Liu

Jinrui Liu

Jinrui is a visiting Ph.D. student from China working on active tectonics of the Tibetan Plateau using tectonic geomorphology methods. He is interested in fault evolution and deformation features of strike-slip faults and exploring the combination with geodetic data. He is primarily supervised by Zhikun Ren of the Institute of Geology, China Earthquake Administration.

Jinrui's published articles include:

•  Liu, J., Ren, Z., Zhang, H., Li, C., Zhang, Z., Zheng, W., Li, X. and Liu C. (2022). Slip Rates Along the Laohushan Fault and Spatial Variation in Slip Rate Along the Haiyuan Fault Zone. Tectonics, 41(2), e2021TC006992.

•  Liu, J., Ren, Z., Zheng, W., Min, W., Li, Z., and Zheng, G. (2020). Late Quaternary slip rate of the Aksay segment and its rapidly decreasing gradient along the Altyn Tagh fault. Geosphere, 16(6), 1538–1557.

Jinrui's awards:  China Scholarship Council Scholarship (China; 2022)

Guy Salomon

Guy Salomon

Guy has been using InSAR and seismology to study a recent earthquake in eastern Siberia, that may help illuminate the diffuse North America–Eurasia plate boundary. During his Masters at the University of Cape Town, he studied the geomorphology of newly identified intraplate faulting in Namibia.

Guy's published articles include:

•  Salomon, G.W., New, T., Muir, R.A., Whitehead, B., Scheiber-Enslin, S., Smit, J., Stevens, V., Kahle, B., Kahle, R., Eckhart, F.D., and Sloan, R.A. (2021). Geomorphological and geophysical analyses of the Hebron fault, SW Namibia: Implications for stable continental region seismic hazard. Geophysical Journal international, 229, 235–254.

•  Stevens, V.L., Sloan, R.A., Chindandali, P.R., Wedmore, L.N., Salomon, G.W. and Muir, R.A. (2021). The Entire Crust can be Seismogenic: Evidence from Southern Malawi. Tectonics, e2020TC006654.

Israporn Sethanant

Grace (Israporn) Sethanant

Grace is currently studying a pair of recent strike-slip earthquakes — in Laos and Nevada — using InSAR imagery and elastic dislocation modelling. During her Masters at Oregon State University she worked on the tectonic geomorphology of Panamint Valley in eastern California.

Grace's awards:  Seismological Society of America Student Presentation Award (SSA; 2021), Second place in UVic's 3-minute thesis competition (UVic; 2021),
       James A. Laurette Agnew Memorial Award (UVic; 2021), Rob & Tammy Lipson Research Scholarship (UVic; 2021), Anand Student Scholarship (UVic; 2021)
       Diana and Martin Hocking Graduate Scholarship (UVic; 2020).

Fengzhou Tan

Fengzhou Tan

Fengzhou is developing automated methods for detecting and locating earthquakes from continuous seismic waveform data. He is also an expert in imaging large earthquake ruptures using the back projection technique. Fengzhou is co-advised with Honn Kao of the Geological Survey of Canada.

Fengzhou's published articles include:

•  Tan, F., Kao, H., Nissen, E., and Visser, R. (2020). Tracking Earthquake Sequences in Real Time: Application of Seismicity-Scanning based on Navigated Automatic Phase-Picking (S-SNAP) to the 2019 Ridgecrest, California Sequence. Geophysical Journal International, 223, 1511–1524.

•  Tan, F., Kao, H., Nissen, E., and Eaton, D. (2019). Seismicity-Scanning based on Navigated Automatic Phase-picking. Journal of Geophysical Research: Solid Earth, 124, 3802-3818.

•  Tan, F., Ge, Z., Kao, H., and Nissen, E. (2019). Validation of the 3-D Phase-Weighted Relative Back Projection Technique and its Application to the 2016 Mw 7.8 Kaikōura Earthquake. Geophysical Journal International, 217, 375-388.

Fengzhou's awards:   President’s Fellowship in Research-Engaged Teaching (UVic; 2020), Charles S. Humphrey Graduate Student Award (UVic; 2020),
          Mitacs Research Training Award (Mitacs; 2020), Alexander and Helen Stafford MacCarthy Muir Graduate Scholarship (UVic; 2020),
          Graduate Entrance Award (UVic; 2019), Diana and Martin Hocking Graduate Scholarship (UVic; 2018)

Siyu Wang

Siyu Wang

Siyu works on secular variations of rock uplift rates along Quaternary detachment- and fault-related folds in the northern Tian Shan (China), using InSAR time series analysis, GPS data and thermochronological methods. She is interested in landscape evolution in tectonically-active areas and links between tectonics, climate and surface processes. Siyu's primary advisor is Ruohong Jiao.

Siyu's published articles include:

•  Wang, S., Nissen, E., Pousse-Beltran, L., Craig, T.J., Jiao, R., and Bergman, E.A. (2022) Structural controls on co-seismic rupture revealed by the 2020 Mw 6.0 Jiashi earthquake (Kepingtag belt, SW Tian Shan, China). Geophysical Journal International, 230 (3), ggac159.

•  Wang, S., Jiao, R., Ren, Z., Wu, C., Ren, G., and Zhang, H. (2020). Active thrusting in an intermontane basin: the Kumysh Fault, eastern Tian Shan. Tectonics, 39, e2019TC006029.

•  Wang, S., Ren, Z., Wu, C., Lei, Q., Gong, W., Ou, Q., Zhang, H., Ren, G., and Li, C. (2019). DEM generation from Worldview-2 stereo imagery and vertical accuracy assessment for its application in active tectonics. Geomorphology, 336, 107-118.

Siyu's awards:  China Scholarship Council Scholarship (China; 2020-2022)

Yijie Zhu

Yijie Zhu

Yijie recently started his Ph.D. at UVic, shortly after finishing his M.Sc. here. He has been working on interseismic strain localization along strike-slip faults using numerical modelling and GPS data. He is primarly supervised by Kelin Wang of the Geological Survey of Canada.

Yijie's published articles include:

•  Wang, K., Zhu, Y., Nissen, E., and Shen Z.-K. (2021). On the Relevance of Geodetic Deformation Rates to Earthquake Potential. Geophysical Research Letters.

•  Zhu, Y, Wang, K., and He, J. (2020). Effects of earthquake recurrence on localization of interseismic deformation around locked strike‐slip faults. Journal of Geophysical Research: Solid Earth, e2020JB019817.

Yijie's awards:  China Scholarship Council Scholarship (China; 2021-2024)

M.Sc. students

Peter Blenman

Peter Blenman

Peter joined the group in the fall and is co-supervised by Andrew Schaeffer of the Geological Survey of Canada. Funded by a GEM North grant, he uses InSAR time series to detect and monitor permafrost degradation and deep-seated landsliding in order to better understand the underlying geological processes.

Research Technician

Roger Stephen

Roger Stephen

Roger is leading the construction, development, and testing of a new lidar drone – euqipmment funded through a grant from the Canadian Foundation for Innovation. This drone has been used to collect high-resolution topographic data along active faults on Vancouver Island and elsewhere in Canada. This is part of a collaborative remote sensing laboratory with Chris Bone in UVic's Geography department, where Roger previously completed his Masters.

Former group members

Julia Walker

Julia Walker

For her B.Sc. Honours thesis, Julia investigated the utility of aftershock forecasting software through retrospective tests on the 2012 Haida Gwaii sequence. She was co-supervised with John Cassidy at the Pacific Geoscience Centre.

Haipeng Luo

Dr. Haipeng Luo

For his Ph.D. Haipeng used numerical models to better understand the spectrum of crustal deformation associated with subduction megathrust faults, in all three parts of the earthquake cycle: interseismic, coseismic and postseismic. Haipeng is now a postdoctortal researcher at McGill university in Montreal.

Haipeng's published articles include:

•  Luo, H., and Wang, K. (2021). Postseismic geodetic signature of cold forearc mantle in subduction zones. Nature Geoscience.

Léa Pousse-Beltran

Dr. Léa Pousse-Beltran

As a post doc in our group Léa worked on a number of notable recent earthquakes, including the 2020 Mw 6.8 Elazığ rupture — the largest instrumental event on the East Anatolian fault — as well as a potential induced earthquake in the Zagros mountains of Iran. She recently returned to France to work at her alma mater, the Institut des Sciences de la Terre (ISTerre) at Université Grenoble Alpes.

Léa's published articles include:

•  Pousse Beltran, L. Nissen, E., Bergman, E., Cambaz, M.D., Gaudreau, É., Karasözen, E., and Tan, F. (2020). The 2020 Mw 6.8 Elazığ (Turkey) earthquake reveals rupture behavior of the East Anatolian Fault. Geophysical Research Letters, 47.

Anna Diederichs

Anna Diederichs

For her M.Sc. (EOS UVic, 2020), Anna investigated how to assess building damage in large earthquakes using InSAR correlation maps and studied three-dimensional deformation in the 2016 Kaikoura, New Zealand earthquake using differential lidar. Anna now works as a Junior Staff Scientist at Ocean Networks Canada.

Anna's published articles include:

•  Diederichs, A., Nissen, E. K., Lajoie, L. J., Langridge, R. M., Malireddi, S. R., Clark, K. J., Hamling, I. J, and Tagliasacchi, A. (2019). Unusual kinematics of the Papatea fault (2016 Kaikōura earthquake) suggest anelastic rupture. Science Advances, 5, eaax5703.

Elena Savidge

Elena Savidge

For her B.Sc. Honors (EOS, UVic, 2020), Elena worked on characterizing a unusual triplet of earthquakes in eastern Iran using InSAR and seismology, as well as a pair of earthquakes in western Turkey. Elena was supported through two USRA awards from NSERC and won several awards for her Honors work, including a Seismological Society of America Student Presentation Award (2019). Elena is now a Ph.D. student in Geophysics at the Colorado School of Mines.

Elena's published articles include:

•  Savidge, E., Nissen, E., Nemati, M., Karasözen, E., Hollingsworth, J., Talebian, M., Bergman, E., Ghods, A., Ghorashi, M., Kosari, E., Rashidi, A., and Rashidi, A. (2019). The December 2017 Hojedk (Iran) earthquake triplet – sequential rupture of shallow reverse faults in a strike-slip restraining bend. Geophysical Journal International, 217, 909-925.

Lia Lajoie

Dr. Lia Lajoie

Lia's PhD in Geophysics (Colorado School of Mines, 2019) focused on imaging large earthquake ruptures using differential lidar and Structure-from-Motion topography. After graduating, Lia worked as Geoscientist in the Park at the Wrangell-St Elias National Park in Alaska, before taking up a postdoctoral research position at the University of Montana.

Lia's published articles include:

•  Lajoie, L. J., Nissen, E., Johnson, K. L., and Lajoie, K. (2020): Sub-meter resolution surface rupture topography from legacy aerial photographs – a test case from the 1992 Landers earthquake. Earth and Space Science, 7.

•  Lajoie, L., Nissen, E., Johnson, K. L., Arrowsmith, J R., Glennie, C. L., Hinojosa‐Corona, A., and Oskin, M. E. (2019). Extent of low‐angle normal slip in the 2010 El Mayor‐Cucapah (Mexico) earthquake from differential lidar. Journal of Geophysical Research: Solid Earth, 124, 943-956.

Ezgi Karasözen

Dr. Ezgi Karasözen

Ezgi's PhD in Geophysics (Colorado School of Mines, 2018) involved seismotectonic studies of the Iranian Zagros mountains and the graben of western Turkey, using calibrated earthquake relocations, InSAR observations and modelling, and regional and teleseismic waveform analysis. She is currently a Post Doc at the Alaska Earthquake Center, University of Alaska Fairbanks.

Ezgi's published articles include:

•  Karasözen, E., Nissen, E., Bergman, E. A., and Ghods, A. (2019). Seismotectonics of the Zagros (Iran) From Orogen‐Wide, Calibrated Earthquake Relocations. Journal of Geophysical Research: Solid Earth, 124, 9109-9129.

•  Karasözen, E., Nissen, E., Büyükakpınar, P., Cambaz D., Kahraman, M., Kalkan, E., Abgarmi, B., Bergman, E., Ghods, A., and Özacar, A. A. (2018). The 2017 July 20 Mw 6.6 Bodrum-Kos earthquake illuminates active faulting in the Gulf of Gökova, SW Turkey. Geophysical Journal International, 214, 185-199.

•  Karasözen, E., Nissen, E., Bergman, E. A., Johnson, K. L., and Walters, R. J. (2016). Normal faulting in the Simav-Gediz graben of western Turkey reassessed with calibrated earthquake relocations. Journal of Geophysical Research: Solid Earth, 121, 4553-4574.

Kendra Johnson

Dr. Kendra Johnson

Kendra's PhD in Geophysics (Colorado School of Mines, 2017) focused on developing Structure-from-Motion as a low-cost tool for mapping tectonic landforms. She also used airborne lidar to characterize the 1959 Hebgen Lake earthquake rupture. Kendra is currently a Post Doc at the Global Earthquake Model Foundation in Italy.

Kendra's published articles include:

•  Johnson, K. L., Nissen, E., and Lajoie, L. (2018). Surface rupture morphology and vertical slip distribution of the 1959 Mw 7.2 Hebgen Lake (Montana) earthquake from airborne lidar topography. Journal of Geophysical Research: Solid Earth, 123, 8229-8248.

•  Johnson, K., Nissen, E., Saripalli, S., Arrowsmith, J. R., McGarey, P, Scharer, K., Williams, P., and Blisniuk, K. (2014). Rapid mapping of ultra-fine fault zone topography with structure from motion. Geosphere, 10, 969-986.