Claudia Piromallo | Istituto Nazionale di Geofisica e Vulcanologia (original) (raw)
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Papers by Claudia Piromallo
We used the data from the dense, broadband AlpArray Seismic Network to derive a set of Receiver F... more We used the data from the dense, broadband AlpArray Seismic Network to derive a set of Receiver Function (RF) measurements on the Moho and Lithosphere-Asthenosphere Boundary (LAB) for a broad region encompassing the Western Alps and including the Ivrea Geophysical Body (IGB), a fragment of mantle emplaced in the lower continental crust. Our analysis fills an information gap since, in spite of numerous active and passive seismological investigations on the Alpine orogen, many of the observations focus on the Moho or the deeper part of the mantle, while reliable information on the LAB below the Alps is scarce. Moreover, our findings provide an additional contribution to resolving the debated topic of the existence of continuous or interrupted continental subduction below the Western Alps.We derive seismic velocity profiles of the crust-uppermost mantle below each of the 50 analyzed stations down to about 250 km depth, through the joint inversion of P and S RFs. We constrain the lateral variations of the Moho and LAB topographies across the colliding plates, and quantify the errors related to our measurements. Our observations allow us to considerably expand the published data of the Moho depth and to add a unique set of new measurements of the LAB (Monna et al., 2022). Our results yield a comparable thickness (on average 90–100 km) of the Eurasia and Adria lithospheres, which are colliding below the IGB; Eurasia is not presently subducting below Adria with vertical continuity. These findings suggest that there is a gap between the superficial (continental) European lithosphere and the deep (oceanic) lithosphere, confirming the discontinuous structure imaged by some seismic tomography models.the AlpArray Working Group: list on http://www.alparray.ethz.ch/home/Monna, S., Montuori, C., Frugoni, F., Piromallo, C., Vinnik, L., & AlpArray Working Group (2022). Moho and LAB across the Western Alps (Europe) from P and S receiver function analysis. Journal of Geophysical Research: Solid Earth, 127, e2022JB025141. https://doi.org/10.1029/2022JB02514
The Canary and Madeira Islands are two distinct hotspots in the Central-East Atlantic that are cl... more The Canary and Madeira Islands are two distinct hotspots in the Central-East Atlantic that are close to each other. Their volcanism is generally attributed to underlying mantle plumes, but the detailed structure of these plumes is still not well understood. The thermal and compositional structure of the plume introduces complexities in the phase transitions of the mantle, which impact the depth and magnitude of seismic discontinuities. We use 1268 high-quality receiver functions from stations located at the two hotspots to detect P-to-s converted phases through a common-conversion point stacking approach and conduct a detailed analysis of mantle seismic discontinuities. The results show that both hotspots are characterized by a thin mantle transition zone (MTZ), with sharp 410 and 660 discontinuities at depths of 429-420 km and 647-664 km, beneath the Canaries and Madeira respectively. The results indicate that the Canary plume crosses the MTZ, whereas the Madeira plume mainly influ...
EGU General Assembly Conference Abstracts, Apr 1, 2016
Geophysical Research Letters, Mar 1, 2004
The Tyrrhenian Sea is an extensional basin opened by trench retreat and back‐arc extension during... more The Tyrrhenian Sea is an extensional basin opened by trench retreat and back‐arc extension during subduction of the Calabrian slab in the last 10–12 My. Subduction is still active beneath the SEmost part of the Tyrrhenian Sea, as testified by seismicity down to 500 km depth. By analyzing seismicity and geodetic data, together with recent tomographic images, we define the present‐day situation. An evident ∼N‐S compressional regime prevails in the Tyrrhenian region west of the Aeolian archipelago, while east of them a NNW‐SSE extension is documented by focal mechanisms and GPS data, with a much smaller strain rate with respect to the past. The transition between these two domains is accommodated by a N‐S discontinuity zone which runs from Aeolian Islands to Mt. Etna with an extensional to strike‐slip deformation.
EGS - AGU - EUG Joint Assembly, Apr 1, 2003
ABSTRACT
Earth-Science Reviews, Nov 1, 2022
Journal of Geophysical Research: Solid Earth
In the framework of INGV Earthquake Department organization, the Research Activity named "So... more In the framework of INGV Earthquake Department organization, the Research Activity named "Sorveglianza sismica ed operatività post-terremoto" (Seismic survey and post-earthquake operativity" (T5) takes care of the development of tools and procedures for the real time evaluation of earthquake effects and the management of seismic emergency. One of main goals of T5 during 2015 was to formalize protocols from emergency teams mainly devoted to evaluation of damages and geologic effects and installation of temporary seismic stations, immediately after a relevant earthquake. Protocols of 5 teams have been formalized by an INGV President Decree on July, 2015. Another goal of T5 for 2015 was to write an INGV general protocol to face a seismic emergency. A draft version has been prepared and it includes an important news, i.e. the existence of an official Crisis Management Unit. To test all these protocols, a drill has been set up simulating a M6.4 earthquake in southern Latiu...
The INGV sites that deliver information in quasi-real-time are well known. People often connect t... more The INGV sites that deliver information in quasi-real-time are well known. People often connect to the INGV
Per ottenere delle immagini di estremo dettaglio della crosta e del mantello, AlpArray propone la... more Per ottenere delle immagini di estremo dettaglio della crosta e del mantello, AlpArray propone la realizzazione di una rete sismica a maglia il più possibile omogenea (massima distanza interstazione 52 km, backbone network), tramite la condivisione dei dati delle reti permanenti esistenti e l'installazione, da parte di ciascun paese partecipante, di numerose stazioni sismiche temporanee a larga banda (BB). Il progetto prevede l'installazione di circa 250 stazioni sismiche in tutta Europa, in particolare in Italia,
HAL (Le Centre pour la Communication Scientifique Directe), Apr 6, 2003
EGS - AGU - EUG Joint Assembly, Apr 1, 2003
ABSTRACT
Tectonophysics, Apr 1, 2008
... Fig. 2. Crustal-scale cross-sections and space–time diagrams showing the age of metamorphic e... more ... Fig. 2. Crustal-scale cross-sections and space–time diagrams showing the age of metamorphic events (peak and retrogression) for (a) the Western Alps, (b) the Corsica–Apennines system and (c) the Ligurian Alps. ... 2b). As evidenced by the space-time diagram in Fig. ...
HAL (Le Centre pour la Communication Scientifique Directe), 2009
RENDICONTI ONLINE DELLA SOCIETÀ GEOLOGICA ITALIANA, 2008
We used the data from the dense, broadband AlpArray Seismic Network to derive a set of Receiver F... more We used the data from the dense, broadband AlpArray Seismic Network to derive a set of Receiver Function (RF) measurements on the Moho and Lithosphere-Asthenosphere Boundary (LAB) for a broad region encompassing the Western Alps and including the Ivrea Geophysical Body (IGB), a fragment of mantle emplaced in the lower continental crust. Our analysis fills an information gap since, in spite of numerous active and passive seismological investigations on the Alpine orogen, many of the observations focus on the Moho or the deeper part of the mantle, while reliable information on the LAB below the Alps is scarce. Moreover, our findings provide an additional contribution to resolving the debated topic of the existence of continuous or interrupted continental subduction below the Western Alps.We derive seismic velocity profiles of the crust-uppermost mantle below each of the 50 analyzed stations down to about 250 km depth, through the joint inversion of P and S RFs. We constrain the lateral variations of the Moho and LAB topographies across the colliding plates, and quantify the errors related to our measurements. Our observations allow us to considerably expand the published data of the Moho depth and to add a unique set of new measurements of the LAB (Monna et al., 2022). Our results yield a comparable thickness (on average 90–100 km) of the Eurasia and Adria lithospheres, which are colliding below the IGB; Eurasia is not presently subducting below Adria with vertical continuity. These findings suggest that there is a gap between the superficial (continental) European lithosphere and the deep (oceanic) lithosphere, confirming the discontinuous structure imaged by some seismic tomography models.the AlpArray Working Group: list on http://www.alparray.ethz.ch/home/Monna, S., Montuori, C., Frugoni, F., Piromallo, C., Vinnik, L., & AlpArray Working Group (2022). Moho and LAB across the Western Alps (Europe) from P and S receiver function analysis. Journal of Geophysical Research: Solid Earth, 127, e2022JB025141. https://doi.org/10.1029/2022JB02514
The Canary and Madeira Islands are two distinct hotspots in the Central-East Atlantic that are cl... more The Canary and Madeira Islands are two distinct hotspots in the Central-East Atlantic that are close to each other. Their volcanism is generally attributed to underlying mantle plumes, but the detailed structure of these plumes is still not well understood. The thermal and compositional structure of the plume introduces complexities in the phase transitions of the mantle, which impact the depth and magnitude of seismic discontinuities. We use 1268 high-quality receiver functions from stations located at the two hotspots to detect P-to-s converted phases through a common-conversion point stacking approach and conduct a detailed analysis of mantle seismic discontinuities. The results show that both hotspots are characterized by a thin mantle transition zone (MTZ), with sharp 410 and 660 discontinuities at depths of 429-420 km and 647-664 km, beneath the Canaries and Madeira respectively. The results indicate that the Canary plume crosses the MTZ, whereas the Madeira plume mainly influ...
EGU General Assembly Conference Abstracts, Apr 1, 2016
Geophysical Research Letters, Mar 1, 2004
The Tyrrhenian Sea is an extensional basin opened by trench retreat and back‐arc extension during... more The Tyrrhenian Sea is an extensional basin opened by trench retreat and back‐arc extension during subduction of the Calabrian slab in the last 10–12 My. Subduction is still active beneath the SEmost part of the Tyrrhenian Sea, as testified by seismicity down to 500 km depth. By analyzing seismicity and geodetic data, together with recent tomographic images, we define the present‐day situation. An evident ∼N‐S compressional regime prevails in the Tyrrhenian region west of the Aeolian archipelago, while east of them a NNW‐SSE extension is documented by focal mechanisms and GPS data, with a much smaller strain rate with respect to the past. The transition between these two domains is accommodated by a N‐S discontinuity zone which runs from Aeolian Islands to Mt. Etna with an extensional to strike‐slip deformation.
EGS - AGU - EUG Joint Assembly, Apr 1, 2003
ABSTRACT
Earth-Science Reviews, Nov 1, 2022
Journal of Geophysical Research: Solid Earth
In the framework of INGV Earthquake Department organization, the Research Activity named "So... more In the framework of INGV Earthquake Department organization, the Research Activity named "Sorveglianza sismica ed operatività post-terremoto" (Seismic survey and post-earthquake operativity" (T5) takes care of the development of tools and procedures for the real time evaluation of earthquake effects and the management of seismic emergency. One of main goals of T5 during 2015 was to formalize protocols from emergency teams mainly devoted to evaluation of damages and geologic effects and installation of temporary seismic stations, immediately after a relevant earthquake. Protocols of 5 teams have been formalized by an INGV President Decree on July, 2015. Another goal of T5 for 2015 was to write an INGV general protocol to face a seismic emergency. A draft version has been prepared and it includes an important news, i.e. the existence of an official Crisis Management Unit. To test all these protocols, a drill has been set up simulating a M6.4 earthquake in southern Latiu...
The INGV sites that deliver information in quasi-real-time are well known. People often connect t... more The INGV sites that deliver information in quasi-real-time are well known. People often connect to the INGV
Per ottenere delle immagini di estremo dettaglio della crosta e del mantello, AlpArray propone la... more Per ottenere delle immagini di estremo dettaglio della crosta e del mantello, AlpArray propone la realizzazione di una rete sismica a maglia il più possibile omogenea (massima distanza interstazione 52 km, backbone network), tramite la condivisione dei dati delle reti permanenti esistenti e l'installazione, da parte di ciascun paese partecipante, di numerose stazioni sismiche temporanee a larga banda (BB). Il progetto prevede l'installazione di circa 250 stazioni sismiche in tutta Europa, in particolare in Italia,
HAL (Le Centre pour la Communication Scientifique Directe), Apr 6, 2003
EGS - AGU - EUG Joint Assembly, Apr 1, 2003
ABSTRACT
Tectonophysics, Apr 1, 2008
... Fig. 2. Crustal-scale cross-sections and space–time diagrams showing the age of metamorphic e... more ... Fig. 2. Crustal-scale cross-sections and space–time diagrams showing the age of metamorphic events (peak and retrogression) for (a) the Western Alps, (b) the Corsica–Apennines system and (c) the Ligurian Alps. ... 2b). As evidenced by the space-time diagram in Fig. ...
HAL (Le Centre pour la Communication Scientifique Directe), 2009
RENDICONTI ONLINE DELLA SOCIETÀ GEOLOGICA ITALIANA, 2008