Le rift est-africain et ses spécificités
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Le rift est-africain est une déchirure à l’échelle lithosphérique de la croûte terrestre qui traverse sur plusieurs milliers de kilomètres la partie orientale de l’Afrique.
Ce phénomène de rifting à grande échelle est le résultat de activité tectonique continue sur plus de 100 millions d’années. Il s’accompagne d’une intense activité volcanique et d’une importante sédimentation. C’est précisément la combinaison de ces trois facteurs – tectonique, volcanique et sédimentaire – qui rend ce contexte du grand rift est-africain unique.
Dans toute la vallée du Rift, la croûte terrestre est chauffée par le magma en fusion qui remonte à la surface par fissures et cônes volcaniques..
Il existe plus de soixante-sept volcans, mais de mon point de vue, une dizaine d’entre eux n’ont pas été identifiés.
L’Ethiopie est le premier pays volcanique d’Afrique. Le volcan le plus connu est l’Erta Ale, au nord de l’Éthiopie, situé près de l’Érythrée. Il se trouve sur cette zone de faille de la vallée du Grand Rift.
Les plaques tectoniques s’ouvrent pour former un nouvel océan. Depuis 1967, Erta Ale est continuellement en éruption avec un lac de lave permanent.
Le 12 juin 2011, une série de tremblements de terre a frappé le nord-est de l’Érythrée, les deux plus fortes secousses atteignant 5,7 sur l’échelle échelle de Richter, et une dizaine d’autres dépassant la magnitude 4.
Une éruption se produit dans la région, probablement près du volcan Nabro, mais l’emplacement exact reste à confirmer en raison des nombreux volcans de la région et de son accès difficile dû en partie aux trèschaleur élevée (environ 60 degrés en été).
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Anne Fornier2023-01-15 19:03:282023-01-15 19:50:20¿Pronto una erupción devastadora en el Mediterráneo?
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Anne Fornier2022-06-20 11:43:482022-06-20 11:43:48Enrichissement en radon dans le panache volcanique de l’Etna
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Anne Fornier2022-01-20 18:27:272022-01-21 12:00:31L’ERUPTION DU TONGA ET LE SYSTEME DE TELECOMMUNICATION
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Anne Fornier2022-01-04 15:04:362022-01-04 15:59:05LA NASA TESTE CURIOSITY ROBOT POUR MARS EN ISLANDE
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Anne Fornier2022-01-03 14:48:462022-01-03 14:56:29MACHINE LEARNING ET TECHNOLOGIE EN VOLCANOLOGIE
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Anne Fornier2021-11-15 10:01:152021-11-15 10:22:02JOURNÉES DES SCIENCES DE LA TERRE ET DE L’ENVIRONNEMENT (JESD) AU TOGO
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Anne Fornier2021-10-19 12:42:172021-10-19 12:44:19LE DANGER DE L’URBANISATION DES ZONES NATURELLES À HAUT RISQUE
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Anne Fornier2021-10-08 12:34:132021-10-19 12:43:49LE MANQUE DE DILIGENCE À LA PALMA, ÎLES CANARIES
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Anne Fornier2021-10-07 14:23:412021-10-07 22:46:07NOS QUESTIONS AU CONGRÈS DES DÉPUTÉS ESPAGNOL
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Anne Fornier2021-10-06 12:19:102021-10-06 13:45:42LA CATASTROPHE DE LA PALMA N’EST PAS UNE CATASTROPHE NATURELLE MAIS UN RISQUE NATUREL
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Anne Fornier2021-10-05 10:43:022021-10-05 12:04:01VOLCANO FOUNDATION DANS L’ABC.ES
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Anne Fornier2021-10-03 11:41:262021-10-06 12:20:38LA FONDATION DANS TIMEOUT BCN
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Anne Fornier2021-09-23 11:10:092021-09-28 11:01:01ÉRUPTION LA PALMA DÉTRUIT DES MAISONS, DÉPLACENT 6 500 PERSONNES
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Anne Fornier2021-09-15 12:00:082021-09-28 11:03:05LES PLUIES ACIDES ET LEUR IMPACT SUR LA BIODIVERSITÉ.
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Anne Fornier2021-09-10 15:30:232021-09-28 11:06:47PARTENARIAT AVEC L’ASSOCIATION CRIHU
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Anne Fornier2021-09-09 16:45:112021-09-28 11:07:36ARTICLE D’ANNE FORNIER DANS ABC SUR L’ÉRUPTION VOLCANIQUE EN ISLANDE
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Anne Fornier2021-09-06 15:49:202021-09-28 11:08:24NOUS SOMMES ASSOCIÉS À LA FONDATION ARMANDO ARMERO
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Anne Fornier2021-08-23 09:39:582021-09-28 11:18:11UN NOUVEAU VOLCAN ÉMERGE À MAYOTTE DEPUIS MAI 2019
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Anne Fornier2021-08-09 08:00:322021-09-28 11:18:53TOP 5 DES VILLES CONSTRUITES SUR DES VOLCANS.
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Anne Fornier2021-08-02 08:00:132021-09-28 11:45:43TROIS CATASTROPHES RÉCENTES QUI AURAIENT PU ÊTRE ÉVITÉES
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Anne Fornier2021-07-26 09:07:182021-09-28 11:46:23IMPACTS ENVIRONNEMENTAUX ET SANITAIRES DU NYIRAGONGO ET DU NYAMULAGIRA
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Anne Fornier2021-07-22 17:14:312021-09-28 11:46:57NOTE TECHNIQUE SUR LE VOLCAN NYIRAGONGO À GOMA
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Anne Fornier2021-07-19 12:45:242021-09-28 11:47:35LE RIFT EST-AFRICAIN ET SA DÉCHIRURE À L’ÉCHELLE LITHOSPHÉRIQUE
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Anne Fornier2021-07-13 08:40:452021-09-28 11:52:12D’UN « ACCIDENT DE FORAGE » À LA NAISSANCE D’UN VOLCAN DE BOUE
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Anne Fornier2021-06-28 15:25:042021-09-28 11:57:58DE LA FICTION À LA RÉALITÉ AVEC LA SÉRIE KATLA
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Anne Fornier2021-06-16 15:31:042021-09-28 11:59:2660% DES VOLCANS ACTIFS N’ONT PAS DE SYSTÈME DE SURVEILLANCE
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Anne Fornier2021-06-09 11:48:462021-09-28 12:00:48UNE DES CAUSES DU CHANGEMENT CLIMATIQUE EST DU AUX VOLCANS
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Anne Fornier2021-05-22 10:43:562021-09-28 12:01:46NOUS LANÇONS VOLCANO SCHOOL: UNE PLATEFORME ÉDUCATIVE
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Anne Fornier2021-05-21 15:11:312021-09-28 12:02:34JOUR DE SANT JORDI: LA TERRE ET LES VOLCANS
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Anne Fornier2021-04-14 08:43:222021-09-28 12:04:47NOUS SOMMES ASSOCIÉS À L’IGRD
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Anne Fornier2021-04-08 16:41:192021-09-28 12:07:02EXPOSITION PIGMEOS BAKA-QUIM FÀBREGAS
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Anne Fornier
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Anne Fornier2019-12-08 12:32:012021-09-15 18:37:43LE REVEIL DU SUPER-VOLCAN NAPOLITAIN SERAIT UNE CATASTROPHE
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1528
2560
Anne Fornier
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Anne Fornier2019-11-18 16:22:482021-09-15 18:40:44INTERVIEW D’ALEXANDRE DEL VALLE À ANNE FORNIER
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754
1246
Anne Fornier
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Anne Fornier2019-11-12 15:08:322021-09-15 18:46:11UNE SÉRIE DE DOCUMENTAIRES POUR ÉDUQUER LE MONDE
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1188
2244
Anne Fornier
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Anne Fornier2019-09-09 15:00:002021-09-15 18:56:03INTERVIEW D’ANNE FORNIER SUR JET8
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1485
1980
Anne Fornier
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Anne Fornier2019-09-09 14:24:052021-09-15 18:59:55LA FONDATION AU MEXIQUE
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698
1240
Anne Fornier
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Anne Fornier2019-08-22 08:32:462021-09-15 19:03:16COMMENT VOUS AFFECTE UNE ÉRUPTION VOLCANIQUE?
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333
500
Anne Fornier
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Anne Fornier2019-08-06 11:19:122021-09-15 19:11:08SITUATION PRÉOCCUPANTE DU VOLCAN UBINAS
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1895
2560
Anne Fornier
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Anne Fornier2019-08-05 15:16:332021-09-15 19:16:50LA FONDATION DANS LE DAUPHINÉ LIBÉRÉ
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2059
2560
Anne Fornier
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Anne Fornier2019-08-05 14:33:232021-09-15 19:19:30LA FONDATION AU BAILLEUR SAVOYARD
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800
1200
Anne Fornier
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Anne Fornier2019-06-11 15:34:472021-09-15 19:22:25EL TEIDE FAIT PARTIE D’UN SYSTÈME VOLCANIQUE ACTIF
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1531
2041
Anne Fornier
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Anne Fornier2019-06-11 08:27:342021-09-15 16:29:00ÉRUPTION DU SINABUNG
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515
1030
Anne Fornier
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Anne Fornier2019-06-04 14:55:072021-09-15 19:27:16L’ERUPTION DE YELLOWSTONE POURRAIT PROVOQUER LA FIN DE L’HUMANITÉ
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578
1366
Anne Fornier
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Anne Fornier2019-05-27 16:05:142021-09-15 19:29:36QUAND LA TERRE RÉVEILLE SA CEINTURE DE FEU.
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1848
1980
Anne Fornier
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Anne Fornier2019-05-07 16:01:022021-09-15 19:32:20LA FONDATION SUR RADIO OLOT
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1709
2560
Anne Fornier
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Anne Fornier2019-05-02 10:51:282021-09-15 19:35:07VOLCANO SCHOOL À OLOT
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628
715
Anne Fornier
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Anne Fornier2019-05-02 08:14:052021-09-15 19:40:25LA FONDATION ET VOLCANO SCHOOL DANS IBERIAN PRESS
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739
715
Anne Fornier
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Anne Fornier2019-05-02 08:00:432021-09-15 19:46:12LA FONDATION ET VOLCANO SCHOOL AU GARROTXI
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1028
1500
Anne Fornier
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Anne Fornier2019-04-29 12:10:492021-09-15 19:50:12PREMIER ÉCHANGE D’ÉCOLES SUR LES VOL VOLCAN ET LEURS RISQUES
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815
1900
Anne Fornier
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Anne Fornier2019-04-26 07:52:482021-09-15 19:54:15TE ACERCO A MI VOLCAN
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1116
1052
Anne Fornier
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Anne Fornier2019-04-25 13:31:522021-09-16 11:09:18LA FONDATION À EL PUNT AVUI
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964
1200
Anne Fornier
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Anne Fornier2019-04-24 14:30:112021-09-16 11:03:06ANNE FORNIER : VOLCANOLOGUE ET LANCEUSE D’ALERTE
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1485
1980
Anne Fornier
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Anne Fornier2019-04-09 08:12:012021-09-16 10:58:44LACS MORTELS
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1830
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Anne Fornier
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Anne Fornier2019-04-04 14:06:182021-09-16 10:55:23LE VOLCAN PARICUTIN. SENTIERS ET INTERPRÉTATION.
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382
576
Anne Fornier
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Anne Fornier2019-04-04 14:04:492021-09-16 10:52:05LES SEPT LUMINAIRES. DES CRATÈRES ENTRE LES VILLAGES.
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1125
1500
Anne Fornier
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Anne Fornier2019-04-04 12:47:462021-09-16 10:45:03RÉSEAU INTERNATIONAL DE GUIDES VOLCANIQUES
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1920
Anne Fornier
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Anne Fornier2019-04-03 16:24:092021-09-16 10:41:24RISQUES NATURELS À GOMA ET DANS LES VILLAGES VOISINS
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437
720
Anne Fornier
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Anne Fornier2019-04-03 15:48:212021-09-16 10:34:53INFLUENCES DE LA DYNAMIQUE DES SOURCES D’HUMIDITÉ ET DES RÉGIMES MÉTÉOROLOGIQUES EN AFRIQUE CENTRALE ET ORIENTALE
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415
1800
Anne Fornier
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Anne Fornier2019-02-19 12:12:172021-09-16 10:31:01VEI: COMMENT ÉVALUEZ-VOUS LA FORCE D’UNE ÉRUPTION ?
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1200
1920
Anne Fornier
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Anne Fornier2019-02-18 17:07:142021-09-16 10:26:57CAMPI FLEGREI, UNE BOMBE À RETARDEMENT
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1958
2048
Anne Fornier
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Anne Fornier2019-01-23 11:03:272021-09-16 10:20:37COMMENT NAÎT UN VOLCAN ? L’HISTOIRE DU PARICUTÍN
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550
1024
Anne Fornier
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Anne Fornier2019-01-16 10:52:182021-09-16 10:18:57L’ETNA POURRAIT-ELLE PROVOQUER UN TSUNAMI ?
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1920
Anne Fornier
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Anne Fornier2018-12-20 12:40:492021-09-16 10:15:17LA FERTILITÉ DES VOLCANS
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795
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Anne Fornier
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Anne Fornier2018-12-20 11:56:112021-09-16 10:10:55CE QUE NOUS SAVONS DES VOLCANS SOUS-MARINS
Since 2021 VOLCANO ACTIVE FOUNDATION has been committed to the UN Global Compact corporate responsibility initiative and its principles in the areas of human rights, labour, the environment and anti-corruption.
NOTE TECHNIQUE SUR LE VOLCAN NYIRAGONGO À GOMA