Tiegan Elizabeth Hobbs

• Professor
• Research Scientist at Natural Resources Canada

This document provides a brief overview of the scenario earthquake and its projected impacts, designed by staff with the national Geohazard Risk project at NRCan (with help from associates at Defence Research and Development Canada, and at the University of Victoria'sDepartment of Civil Engineering). This was prepared for the "Coastal Response" eme...

The geometry and kinematics of the causative fault of the 27 July 2022 moment magnitude (M W) 7.0 earthquake, which is one of the strongest to hit northern and central Luzon in the past 30 years, were estimated through inverse modeling of line-of-sight interferometric synthetic aperture radar deformation. We modeled rupture along multiple candidate...

Th earthquake article is part of the Resilience Pathways Report. The report has the following objectives: a) to share knowledge about existing practices and recent advances in understanding and managing disaster and climate risk in BC, including some information on relevant federal programs, and b) to provide insights on gaps and recommendations th...

Canada's earthquake scenario catalogue is a nationwide collection of possible earthquake rupture scenarios that allows us to understand which populations and assets will be impacted by the rupture of particular faults (or their segments). In the past, scenarios were often generated on an ad hoc basis, when they were needed by practitioners. As new...

We present detailed surface measurements of the first 3.5 years of postseismic deformation following the 5 September 2012 moment magnitude (Mw) 7.6 Nicoya, Costa Rica earthquake. The dominant signal in the first 2.5 years is uniform horizontal trenchward motion totaling 7-26 cm across 40 stations. Trenchward velocity is strongly diminished by mid 2...

We apply a waveform matching technique to obtain a detailed earthquake catalog around the rupture zone of the 5 September 2012 moment magnitude 7.6 Nicoya earthquake, with emphasis on its aftershock sequence. Starting from a preliminary catalog, we relocate ~7900 events using TomoDD to better quantify their spatiotemporal behavior. Relocated afters...

We normally view the subduction interface as a constant structure throughout the seismic cycle, with the majority of stress-buildup, microseismicity, and slip occurring along it. However, using microseismicity recorded using a uniquely dense seismic network directly over the active subduction interface below Nicoya, Costa Rica, we find two differen...

Measurements of seismic anisotropy in continental regions are frequently interpreted with respect to past tectonic processes, preserved in the lithosphere as "fossil" fabrics. Models of the present-day sublithospheric flow (often using absolute plate motion as a proxy) are also used to explain the observations. Discriminating between these differen...

This article examines spatial changes to the local stress field resulting from the 28 October 2012, Mw 7.8 Haida Gwaii earthquake, off the west coast of Moresby Island, British Columbia. This event occurred on a northeast-dipping, potentially blindthrust fault rather than on the subvertical Queen Charlotte fault (QCF) that represents the Pacific–No...

This study examines rupture properties of the October 28, 2012, Mw 7.7 Haida Gwaii earthquake o� the coast of British Columbia using an empirical Green's function (EGF) technique. Surface waveforms from a 2001 Mw 6.0 event, which ruptured only 15 km from the 2012 epicenter with an almost identical mechanism, are used as an EGF to be deconvolved fro...

This study examines spatial changes to the local stress �eld resulting from the October 28, 2012, Mw 7.7 Haida Gwaii earthquake, which oc- curred west of Moresby Island o� the coast of British Columbia. This event is thought to have occurred on a NE-dipping, blind thrust fault rather than on the sub-vertical Queen Charlotte Fault that represents th...

Introduction: Through receiver function analysis, this study inquires into some of the most basic properties of the crust below southern and central Quebec. Methods: This is accomplished, using receiver function technique, by stacking waveforms from 277 teleseismic events magnitude 6.0 and larger to find the delay in arrival time for several phases...

In 2007 and 2009, seven new broadband seismograph stations were installed in central and southern Québec, filling an important gap in network coverage across the region. The majority of the stations are situated within the Archean Superior craton, with a further two located in the Proterozoic Grenville Province. In this study, we examine receiver f...