Andrew Nyblade
PROFESSOR of Geosciences | Pennsylvania State University
University Park, PA, UNITED STATES
Andrew Nyblade is an expert in geophysics, tectonics, applied seismology, and AfricaArray.
Media
Publications:
Documents:
Videos:
Audio/Podcasts:
Industry Expertise (2)
Research
Education/Learning
Areas of Expertise (4)
AfricaArray
Seismology
Tectonics
Geophysics
Biography
Andrew Nyblade is a Professor in the Department of Geosciences at Penn State University.
Education (4)
University of Michigan: Ph.D. 1992
University of Wyoming: M.S. 1985
Wittenberg University: B.A., Geology 1982
Wittenberg University: B.A., Earth Science Education 1982
Links (1)
Articles (4)
Shear velocity structure of the crust and upper mantle of Madagascar derived from surface wave tomography
Earth and Planetary Science Letters
G Aleqabi, DA Wiens, AA Nyblade, et al.
2017 The crust and upper mantle of the Madagascar continental fragment remained largely unexplored until a series of recent broadband seismic experiments. An island-wide deployment of broadband seismic instruments has allowed the first study of phase velocity variations, derived from surface waves, across the entire island. Late Cenozoic alkaline intraplate volcanism has occurred in three separate regions of Madagascar (north, central and southwest), with the north and central volcanism active until
Shear wave splitting across the Mid-Atlantic region of North America: A fossil anisotropy interpretation
Geological Society of America
Austin L. White-Gaynor, Andrew A. Nyblade
2017 New shear wave splitting measurements (n = 76) from the Mid-Atlantic section of North America, when combined with previously reported measurements, provide improved clarity to patterns of seismic anisotropy across the region, including a rotation of fast polarization directions (ϕ) from east-west to northeast-southwest in Pennsylvania (USA). We attribute the patterns in ϕ to frozen-in (i.e., fossil) anisotropy in the lithospheric mantle.
Assessing seismic hazard of the East African Rift: a pilot study from GEM and AfricaArray
Bulletin of Earthquake Engineering
Valerio Poggi, Raymond Durrheim, Georges Mavonga Tuluka, Graeme Weatherill, Robin Gee, Marco Pagani, Andrew Nyblade, Damien Delvaux
2017 The East African Rift System is the major active tectonic feature of the Sub-Saharan Africa region. Although the seismicity level of this divergent plate boundary can be described as moderate, several damaging earthquakes have been reported in historical times, and the seismic risk is exacerbated by the high vulnerability of the local buildings and structures. Formulation and enforcement of national seismic codes is therefore an essential future risk mitigation strategy. Nonetheless, a reliable risk assessment cannot be done without the calibration of an updated seismic hazard model for the region.
The structure of the crust and uppermost mantle beneath Madagascar
Geophysics Journal International
Fenitra Andriampenomanana Andrew A. Nyblade Michael E. Wysession Raymond J. Durrheim Frederik Tilmann Jordi Julià Martin J. Pratt Gérard Rambolamanana Ghassan Aleqabi Patrick J. Shore
2017 The lithosphere of Madagascar was initially amalgamated during the Pan-African events in the Neoproterozoic. It has subsequently been reshaped by extensional processes associated with the separation from Africa and India in the Jurassic and Cretaceous, respectively, and been subjected to several magmatic events in the late Cretaceous and the Cenozoic. In this study, the crust and uppermost mantle have been investigated to gain insights into the present-day structure and tectonic evolution of Madagascar. We analysed receiver functions, computed from data recorded on 37 broad-band seismic stations, using the H–κ stacking method and a joint inversion with Rayleigh-wave phase-velocity measurements.