Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Mehdi Nikkhoo"'
Autor:
Mehdi Nikkhoo, Eleonora Rivalta
The location and volume change of pressurized magma chambers can be constrained by inverse modelling of the surface displacements they cause. Through a joint inversion of surface displacements and gravity changes the chamber mass change during the pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::42810cf797928b5e712d370eb6b7b41d
https://doi.org/10.5194/egusphere-egu22-9620
https://doi.org/10.5194/egusphere-egu22-9620
Autor:
Mehdi Nikkhoo, Eleonora Rivalta
Deformation source inversions have played a substantial role in our present understanding of magma plumbing systems at active volcanoes. Such inversions mostly rely on analytical models for uniformly-pressurized cavities as idealized representations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c306bbbab21b34821c0ef8c76df461f
https://doi.org/10.5194/egusphere-egu22-13046
https://doi.org/10.5194/egusphere-egu22-13046
Autor:
Mehdi Nikkhoo, Eleonora Rivalta
Publikováno v:
Geophysical Research Letters
Volcanic crises are often associated with magmatic intrusions or the pressurization of magma chambers of various shapes. These volumetric sources deform the country rocks, changing their density, and cause surface uplift. Both the net mass of intrudi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8693decaf80a01b0314a979c58a1785e
http://hdl.handle.net/11585/883905
http://hdl.handle.net/11585/883905
Autor:
Luigi Passarelli, Eleonora Rivalta, Costanza Bonadonna, Mehdi Nikkhoo, Daniele Carbone, Corine Frischknecht
Lava fountains represent a common eruptive phenomenon at basaltic volcanoes, which consist of jets of fluid lava ejected into the atmosphere from active vents or fissures. They are driven by rapid formation and expansion of gas bubbles during magma a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fcd05ad4ce44b11456cd9bd9408116b5
https://doi.org/10.5194/egusphere-egu21-9186
https://doi.org/10.5194/egusphere-egu21-9186
Autor:
Mehdi Nikkhoo, Eleonora Rivalta
Gravity change observations at volcanoes provide information on the location and mass change of intruded magma bodies. Gravity change and surface displacement observations are often combined in order to infer the density of the intruded materials. Pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6855d3073beb46764b8583760c7fcc6e
https://doi.org/10.5194/egusphere-egu21-4887
https://doi.org/10.5194/egusphere-egu21-4887
The transport of magma and magmatic fluids is a key process behind the occurrence, duration and intensity of volcanic crises. Volcano gravimetry allows for unequivocal inference of the location and mass of accumulated or removed magmatic fluids at vo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6f57a6a87d8887b5a835e01f8a45f30
https://doi.org/10.5194/egusphere-egu2020-4647
https://doi.org/10.5194/egusphere-egu2020-4647
Autor:
Eleonora Rivalta, Mehdi Nikkhoo
The largest volcanic eruptions in the geological record are typical of Large Igneous Provinces (LIPs) or of calderas. Known factors facilitating large eruptions include a large size of the feeding magma reservoir, massive vesiculation and gradual col
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b0f7a23c4f2a4ed8dba51c20bd262f0
https://doi.org/10.5194/egusphere-egu2020-19843
https://doi.org/10.5194/egusphere-egu2020-19843
Autor:
Giuseppe Siligato, Costanza Bonadonna, Laura Antoni-Micollier, Eleonora Rivalta, Elske de Zeeuw-van Dalfsen, Alfio Messina, Filippo Greco, Jean Lautier-Gaud, Mehdi Nikkhoo, Danilo Contrafatto, Flavio Cannavò, Mathijs Koymans, Corine Frischknecht, G. D. Hammond, Daniele Carbone, Richard Middlemiss, K. Toland
Publikováno v:
EGU General Assembly 2020
Gravimetry is the only method able to directly track redistributions of bulk masses. Hence, it can supply unique information on geophysical processes that involve subsurface fluids like water, hydrocarbons, and magma. Nevertheless, the high cost of c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9bd561845641c41fbd952e7a6e1631a2
https://doi.org/10.5194/egusphere-egu2020-16329
https://doi.org/10.5194/egusphere-egu2020-16329
Autor:
Hoby N. T. Razafindrakoto, Mehdi Nikkhoo, Gesa Petersen, Simone Cesca, Eleonora Rivalta, Luigi Passarelli, Marius Isken, Jean Letort, Torsten Dahm, Sebastian Heimann, Fabrice Cotton
Publikováno v:
Nature Geoscience
Abstracts
Abstracts
The dynamics of magma deep in the Earth’s crust are difficult to capture by geophysical monitoring. Since May 2018, a seismically quiet area offshore of Mayotte in the western Indian Ocean has been affected by complex seismic activity, including lo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c57192b86aaa6271727a4327ac22e12e
https://gfzpublic.gfz-potsdam.de/pubman/item/item_4953892_3/component/file_5000011/4953892.pdf
https://gfzpublic.gfz-potsdam.de/pubman/item/item_4953892_3/component/file_5000011/4953892.pdf