Paula Koelemeijer
@seismokoel.bsky.social
Seismological Earth explorer, Royal Society URF at Oxford Earth Sciences, Fellow at Exeter College. #womeninSTEM #AcademicMom. Views my own (she/her)
Using this approach, we obtain several features that we can now quantitatively interpret, including a subslab hot mantle upwelling beneath the Sumatra slab, while we find no evidence of slab holes under Java or East Sumbawa given the model resolution.
November 25, 2025 at 11:02 PM
Using this approach, we obtain several features that we can now quantitatively interpret, including a subslab hot mantle upwelling beneath the Sumatra slab, while we find no evidence of slab holes under Java or East Sumbawa given the model resolution.
We use a number of metrics to select areas with the same local resolution for Vs and Vp. This allows us to obtain meaningful estimates of their ratio, with uncertainties estimated using the theoretical Hinkley distribution.
November 25, 2025 at 11:02 PM
We use a number of metrics to select areas with the same local resolution for Vs and Vp. This allows us to obtain meaningful estimates of their ratio, with uncertainties estimated using the theoretical Hinkley distribution.
These findings are consistent with earlier work from 2018 (www.sciencedirect.com/science/arti...), but all has been done in a more rigorous approach (using new seismological estimates with uncertainties combined with updated mineral physics).
Constraints on the presence of post-perovskite in Earth's lowermost mantle from tomographic-geodynamic model comparisons
Lower mantle tomography models consistently feature an increase in the ratio of shear-wave velocity (VS) to compressional-wave velocity (VP) variation…
www.sciencedirect.com
September 15, 2025 at 2:24 PM
These findings are consistent with earlier work from 2018 (www.sciencedirect.com/science/arti...), but all has been done in a more rigorous approach (using new seismological estimates with uncertainties combined with updated mineral physics).
Using new mineral physics estimates, Justin found that a co-occurrence of bridgmanite and post-perovskite at the same depth fits the ratios and correlations of seismic velocities best, while iron-rich models can be ruled out based on the velocity amplitudes and their uncertainties.
September 15, 2025 at 2:24 PM
Using new mineral physics estimates, Justin found that a co-occurrence of bridgmanite and post-perovskite at the same depth fits the ratios and correlations of seismic velocities best, while iron-rich models can be ruled out based on the velocity amplitudes and their uncertainties.
By using Backus-Gilbert methods, we obtain models with uncertainty and resolution, allowing us to perform quantitative interpretations. Importantly, Federica developed models with the same resolution for Vs & Vp, making it possible to interpret their ratio. See: www.sciencedirect.com/science/arti...
Robust estimates of the ratio between S- and P-wave velocity anomalies in the Earth's mantle using normal modes
Seismic tomography allows us to image the interior of the Earth. In general, to determine the nature of seismic anomalies, constraints on more than on…
www.sciencedirect.com
September 15, 2025 at 2:24 PM
By using Backus-Gilbert methods, we obtain models with uncertainty and resolution, allowing us to perform quantitative interpretations. Importantly, Federica developed models with the same resolution for Vs & Vp, making it possible to interpret their ratio. See: www.sciencedirect.com/science/arti...
Do check out the great work done by these young researchers and learn about the diverse research conducted in the group!
August 28, 2025 at 2:25 PM
Do check out the great work done by these young researchers and learn about the diverse research conducted in the group!
At IASPEI, Fatme Ramadan will give a solicited talk on "PGVnet: a machine learning framework for the generation of rapid, physics-consistent PGV maps" (11:30-12:00), followed by Sam Scivier spaking about "Probabilistic fusion of seismic velocity models using Gaussian processes" (12:00-12:15)
August 28, 2025 at 2:25 PM
At IASPEI, Fatme Ramadan will give a solicited talk on "PGVnet: a machine learning framework for the generation of rapid, physics-consistent PGV maps" (11:30-12:00), followed by Sam Scivier spaking about "Probabilistic fusion of seismic velocity models using Gaussian processes" (12:00-12:15)
At PGRiP, Adrian Mag will talk about probabilistic linear inferences, Sixtine Dromigny will show her work on variational probabilistic body wave tomography and Lara Boudinot will show results from Uganda on the influence of anthropogenic seismic vibrations on large mammal behaviour
August 28, 2025 at 2:25 PM
At PGRiP, Adrian Mag will talk about probabilistic linear inferences, Sixtine Dromigny will show her work on variational probabilistic body wave tomography and Lara Boudinot will show results from Uganda on the influence of anthropogenic seismic vibrations on large mammal behaviour
This contribution details the theoretical framework and methodology in a synthetic setup - stay tuned for the real application!
August 27, 2025 at 12:46 PM
This contribution details the theoretical framework and methodology in a synthetic setup - stay tuned for the real application!