Projects | Structural Geology - Judith Hubbard

The country of Bangladesh sits in a complex tectonic region on the eastern side of the India-Asia collision zone. In order to both unravel the tectonic structure of the region and to better assess earthquake hazards, we installed a network of 28 seismometers in 2016 across the eastern side of... Read more

In subduction zones, the greatest hazard from earthquakes often comes from tsunami waves. However, models linking earthquake slip to tsunamis often fit data poorly (e.g. 2010 M7.8 Mentawai earthquake, Hill et al., 2012). These models typically assume that the seafloor uplift due to earthquake... Read more

The 2015 Mw7.8 Gorkha earthquake, Nepal, was a reminder of the seismic hazard presented by the Himalayan fault system. However, the earthquake was small in the context of Himalayan events. From paleoseismic studies and historical data, we know that this fault system likely slips in much larger,... Read more

In 2014 and 2015, the Structural Geology group at EOS conducted seismic reflection acquisition in Nepal across the Main Frontal Thrust to constrain its geometry and kinematics. These lines reveal both sedimentary evidence of base level change and growth strata deposited at the fault tip of a... Read more

The highest mountains on Earth, the Himalaya, are the product of 50 million years of collision between India and Eurasia (Yin and Harrison, 2000). The Main Frontal Thrust (MFT) lies at the southern margin of the Himalayan collision zone, and appears to accommodate 50-100% of the shortening... Read more

To the west of the Intraplate Deformation zone, across the Indo-Burma Ranges, lies another large contractional zone: the Chittagong-Tripura fold belt. Thirty-five percent of the country of Bangladesh sits on top of this actively deforming region, including the capital of Bangladesh, Dhaka, with... Read more

Past Projects

The Longmen Shan mountain range, site of the devastating 12 May 2008 Wenchuan (Mw7.9) earthquake, defines the eastern margin of the Himalayan orogen and exhibits greater topographic relief than anywhere else in the Tibetan plateau. However, before the earthquake, geodetic and geologic surveys... Read more

The 2008 Mw7.9 Wenchuan earthquake ruptured an imbricate thrust system in the Longmenshan range, which forms the eastern boundary of the Tibetan Plateau. We use seismic reflection data and surface geology to construct geologic cross sections and a three-dimensional (3D) fault model in the range... Read more

The Ventura Avenue anticline is one of the fastest uplifting structures in southern California, rising at ∼5 mm/yr (Rockwell et al., 1988). We use well data and seismic reflection profiles to show that the anticline is underlain by the Ventura fault, which extends to seismogenic depth. Fault... Read more

We are working to generate a Community Fault Model and Community Velocity Model in the Sichuan basin and Longmenshan, site of the 2008 M7.9 Wenchuan earthquake, similar to existing models in Southern California. The goal of our research is to understand the geometries... Read more

The second-largest country in Southeast Asia, Myanmar, is home to over 60 million people. This country lies in the complex boundary zone on the eastern edge of the Indian plate. Due to its political isolation, the country has been largely inaccessible to the western world for half a century (... Read more