Graça Silveira
Profile
Research Group: RG3 – Solid Earth dynamics
Position at IDL: Researcher
Job: Professor Coordinator, ISEL
Email: mdsilveira@fc.ul.pt
Telephone Number: (351) 21-750-0812
Extension: 28321
Room: 8.3.21
Academic Degree and field of specialization: PhD in Physics/Geophysics 2002
My research is focused on deciphering earth structure, from the crust to the lower mantle, using seismic tomography, ambient seismic noise, anisotropy, and receiver functions. Aiming to contribute to better knowledge of the role and origin at the depth of mantle plumes, I conduct most of my work in the Atlantic volcanic islands. More recently, I have focused on monitoring tiny changes in the Earth's subsurface structure using seismic noise interferometry.
Keywords: Surface waves tomography, seismic anisotropy, seismic ambient noise, Seismic receiver functions, Hotspots, Deep earth structure.
Scientific Informations
ORCID: https://orcid.org/0000-0002-2110-2554
SCOPUS ID: https://www.scopus.com/authid/detail.uri?authorId=6602698071
Researcher ID: https://publons.com/researcher/2876722/graca-m-silveira/
Research Gate: https://www.researchgate.net/profile/Graca_Silveira
Google Scholar: https://scholar.google.pt/citations?user=zOR-Bi0AAAAJ&hl=pt-PT
Scientific Interests
Main Interests:
Surface waves tomography and seismic anisotropy. Seismic ambient noise. Seismic receiver functions. Environmental seismology.
Hotspots. Deep earth structure.
Top 10 Publications:
Schlaphorst, D., Silveira, G., Ramalho, R. S., & González, P. J. (2024). Dynamic subsurface changes on El Hierro and La Palma during volcanic unrest revealed by temporal variations in seismic anisotropy patterns. Frontiers in Earth Science. DOI: 10.3389/feart.2023.1299338
Pinzón, J. I., Custódio, S., Silveira, G., Krüger, F., Mata, J., & Matias, L. (2024). Crustal and uppermost mantle structure near the Gloria Fault, North Atlantic, from ocean bottom seismometer surface wave observations. Geophysical Journal International. DOI: 10.1093/gji/ggad405
Le Mouël J-L., Gibert D., Courtillot V., Dumont S., de Bremond d'Ars J., Petrosino S., Zuddas P., Lopes F., Boulé J-B., Neves M. C., Custódio S., Silveira G., Kossobokov V., Coen L., Gèze M. (2024). On the external forcing of global eruptive activity in the past 300 years. Frontiers in Earth Science. DOI: 10.3389/feart.2023.1254855
Civiero, C., Carvalho, J., & Silveira, G. (2023). Mantle structure beneath the Macaronesian volcanic islands (Cape Verde, Canaries, Madeira and Azores): A review and future directions. Frontiers in Earth Science. DOI: 10.3389/feart.2023.1126274
Schlaphorst, D., Silveira, G., Mata, J., Krüger, F., Dahm, T., & Ferreira, A. M. (2023). Heterogeneous seismic anisotropy beneath Madeira and Canary archipelagos revealed by local and teleseismic shear wave splitting. Geophysical Journal International. DOI: 10.1093/gji/ggac472
Mohammadigheymasi, H., Tavakolizadeh, N., Matias, L., Mousavi, S. M., Silveira, G., Custódio, S., Dias, N., Fernandes, R., Moradichaloshtori, Y. (2023). Application of deep learning for seismicity analysis in Ghana. Geosystems and Geoenvironment. DOI: 10.1016/j.geogeo.2022.100152
Carvalho, J., Silveira, G., Kiselev, S., Custódio, S., Ramalho, R. S., Stutzmann, E., Schimmel, M. (2022). Crustal and uppermost mantle structure of Cape Verde from ambient noise tomography, Geophysical Journal International. DOI: 10.1093/gji/ggac254
Silveira, G., Dias, N. A., Kiselev, S., Stutzmann, E., Custódio, S., & Schimmel, M. (2022). Imaging the crust and uppermost mantle structure of Portugal (West Iberia) with seismic ambient noise. Geophysical Journal International, 230(2), 1106-1120. DOI: 10.1093/gji/ggac106
Carvalho, J., Silveira, G., Dumont, S., & Ramalho, R. (2022). 3D-ambient noise surface wave tomography of Fogo volcano, Cape Verde. Journal of Volcanology and Geothermal Research. DOI: 10.1016/j.jvolgeores.2022.107702
Civiero, C., Custódio, S., Neres, M., Schlaphorst, D., Mata, J., & Silveira, G. (2021). The role of the seismically slow Central‐East Atlantic anomaly in the genesis of the Canary and Madeira volcanic provinces. Geophysical Research Letters. DOI: 10.1029/2021GL092874
Projects (10 most relevant):
GEMMA - improving GEodynamic Models in MAcaronesia by reconciling geodetic, geophysical and geological data. 2018 - 2022 | GRANT_NUMBER PTDC/CTA-GEO/2083/2021. DOI: 10.54499/PTDC/CTA-GEO/2083/2021. Role: Researcher.
RESTLESS - integRatEd tools to decipher the genesis and Spatio-TemporaL Evolution of Seismic Sequences (Lisbon, Lisbon) 2021-2025 |GRANT_NUMBER: PTDC/CTA-GEF/6674/2020. DOI: 10.54499/PTDC/CTA-GEF/6674/2020. Role: Researcher and Task Leader
TSHAPS-Towards Seismic Hazard Assessment in Portuguese-Speaking African Countries. 2020-2024. Programa FCT - Aga Khan. Contract nº 541685934
SIGHT – SeIsmic and Geochemical constraints on the Madeira HoTspot system. 2018 - 2022|GRANT_NUMBER: PTDC/CTA-GEF/30264/2017. Role: PI
SHAZAM – Seismicity and HAzards of the sub-saharian Atlantic Margin. 2019 - 2022|GRANT_NUMBER: PTDC/CTA-GEO/31475/2017. Role: Researcher
STORM – Atmosphere – Ocean – Solid Earth Coupling: Seismic Tools to Explore and Monitor the Oceans. 2018-11 to 2020-05|GRANT_NUMBER: UTAP-EXPL/EAC/0056/2017 Role: Researcher
SPIDER - Seismogenic Processes In slowly DEforming Regions. 2016-2020. GRANT_NUMBER: PTDC/GEO-FIQ/2590/2014
C4G - Collaboratory for Geosciences. 2017-2021. GRANT_NUMBER: 01/SAICT/2016/22151.
FIRE - Fogo Island volcano: multi disciplinary Research on 2014 Eruption. 2015-2020. GRANT_NUMBER: PTDC/GEO-GEO/1123/2014
TIDES - TIme DEpendent Seismology - COST Action ES1401. Role: STSM Coordinator and Management Committee
Books & Chapters (up to 10):
Santos, F., Silveira, G., Matias, L.. 2013. “Resolver o Problema Inverso para Encontrar Recursos e Investigar o Interior da Terra”, in: Matemática do Planeta Terra, Editores: Fernando Pestana da Costa, João Teixeira Pinto e Jorge Buescu, IST Press, ISBN: 978-989-8481-26-9.
Conferences (last 15 presentations):
Krüger, F., Heimann, S., Custodio, S., Silveira, G., Matias, L., & Schlaphorst, D. (2023). The seismicity of the Madeira archipelago–hints for active volcanism and/or tectonic faults?. In XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG). GFZ German Research Centre for Geosciences.
Carvalho, J., Silveira, G., Bento, V., Schimmel, M., & Antón, R. (2023). Insights into the fluid migration dynamics of Tajogaite eruption, La Palma (No. EGU23-9245). Copernicus Meetings.
Fontiela, J., Afonso Dias, N., Silveira, G., Moreira, M., & Matias, L. (2023, May). Seismicity and crustal structure of the Terceira Island, Azores. In EGU General Assembly Conference Abstracts (pp. EGU-14189).
Silveira, G., Carvalho, J., Kiselev, S., Stutzmann, E., & Schimmel, M. (2022, May). 3D Imaging of the crust and uppermost mantle of the Northeast Atlantic, from Madeira and Canaries to the Atlas-Gibraltar zone. In EGU General Assembly Conference Abstracts (pp. EGU22-10076).
Bonatto, L., Schlaphorst, D., Silveira, G., Mata, J., Civiero, C., Piromallo, C., & Schimmel, M. (2022, May). Unveiling the heterogeneous structure of the upper-mantle beneath the Canary and Madeira volcanic provinces. In EGU General Assembly Conference Abstracts (pp. EGU22-10184).
Schlaphorst, D., Silveira, G., Ramalho, R. S., González, P. J., & Antón, R. (2022, May). Temporal variations in fast shear-wave polarisation direction observed during and after the 2011-2012 El Hierro eruption from local shear-wave splitting. In EGU General Assembly Conference Abstracts (pp. EGU22-9225).
Fontiela, J., Afonso Dias, N., Silveira, G., Moreira, M., Carrilho, F., & Matias, L. (2022, May). Seismicity of the Terceira Island (Azores) recorded by a temporary seismic network. In EGU General Assembly Conference Abstracts (pp. EGU22-12002).
Custódio, S., Civiero, C., Mata, J., Silveira, G., Neres, M., & Schlaphorst, D. (2021, April). The Central-East Atlantic Anomaly: its role in the genesis of the Canary and Madeira volcanic provinces. In EGU General Assembly Conference Abstracts (pp. EGU21-14677).
Almeida, E., Mohammadigheymasi, H., Fathi, M., Crocker, P., & Silveira, G. (2021, April). Eigenvalue decomposition polarization analysis: A regularized sparsity-based approach. In EGU General Assembly Conference Abstracts (pp. EGU21-15267).
Mohammadigheymasi, H., Ebrahimi, M. R., & Silveira, G. (2021, April). A sparsity-based adaptive filtering approach to shear wave splitting. In EGU General Assembly Conference Abstracts (pp. EGU21-13988).
Pinzon, J., Custódio, S., Silveira, G., Matias, L., & Krüger, F. (2021, April). Ambient noise surface wave inversion using OBS data from the north Atlantic, north of the Gloria fault. In EGU General Assembly Conference Abstracts (pp. EGU21-7188).
Schlaphorst, D., Silveira, G., Mata, J., Krüger, F., Dahm, T., & Ferreira, A. (2021). Similarities between the Madeira and Canary Hotspots Revealed by Seismic Anisotropy from Teleseismic and Local Shear-Wave Splitting with the SIGHT Project (No. EGU21-10797). Copernicus Meetings.
Silveira, G., Carvalho, J., Pinzon, J., Custódio, S., Corela, C., & Matias, L. (2020, May). Effect of the water layer on seismic noise cross-correlation across the Northeast Atlantic, from Madeira and Canaries to the Atlas-Gibraltar zone. In EGU General Assembly Conference Abstracts (p. 18561).
Carvalho, J., Bonadio, R., Silveira, G., Lebedev, S., Custódio, S., Mata, Arroucau, P., Meier, T., J., Celli, N. (2020). High temperature in the upper mantle beneath Cape Verde as a possible cause for the oceanic lithosphere rejuvenation inferred from Rayleigh-wave phase-velocity measurements (No. EGU2020-5754). Copernicus Meetings.
Schlaphorst, D., Silveira, G., & Mata, J. (2020). Investigating Seismic Anisotropy of the Madeira and Canaries Hotspots Using Teleseismic and Local Shear-Wave Splitting with the SIGHT project (No. EGU2020-9340). Copernicus Meetings.