Dr Ana Ferreira
Dr Ana Ferreira
I study deep Earth structure and earthquake source processes to obtain an integrated understanding of the processes controlling the dynamic behaviour of our planet from the surface down to the lowermost mantle. My research group develops and uses novel comprehensive methodologies for modelling seismic and, more recently, geodetic data.
Our research work includes:
- Seismic tomography
We have built new 3D global models of seismic anisotropy (the variation of wavespeed with direction, a potential proxy for strain and flow) in the mantle, showing that deep Earth imaging can be strongly affected by assumptions about the crust (Ferreira et al. 2010). We are currently building a new suite of whole-mantle anisotropy models using multiple datasets.
- Earthquake source processes
We study earthquake sources using a wide range of data, notably seismic surface waves (e.g., Ferreira et al. 2011), low-frequency normal modes (Lentas et al. 2013) and geodetic (InSAR) data (e.g., Weston et al. 2012). We recently compiled the first archive of source models based on InSAR data, the ICMT database (Weston et al. 2011; Ferreira et al. 2011).
- Forward modelling and multidisciplinary data
We use purely numerical and asymptotic techniques to simulate seismic wave propagation in realistic media, such as the full ray theory approach that we implemented to simulate surface waves in the 3D Earth (Ferreira & Woodhouse 2007). We model not only seismic data, but also other data types such as tilt (Ferreira et al. 2006) and rotational signals (e.g. Ferreira & Igel 2009).