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Cyclone Gamane in Madagascar

Cyclone Gamane made landfall in Madagascar on 27 March, leaving 18 dead and affecting thousands of people.

The storm was originally forecast to pass by the northern coast of the country, but unexpectedly changed course on 27 March, crossing over Vohémar district in the early hours of the day and continuing across the north-eastern districts of the island. The slow-moving storm dissipated in the afternoon on 28 March.

Gamane brought heavy rain to the northern areas of Madagascar, and strong winds, causing floods and damage to infrastructure. It is estimated that more than 20,000 people were forced from their homes by the storm.

Related News and Resources

UNITAR/UNOSAT web map of Cyclone Gamane's impact to Madagascar

Tipo de evento:	Storm - Cyclone, Floods
Local do evento:	Madagascar
Data da Ativação da Carta:	2024-03-29
Tempo de Ativação da Carta:	13:38
Zona de Tempo da Ativação da Carta:	UTC+03:00
Requisitante da Carta:	Bureau National de Gestion des Risques et des Catastrophes (BNGRC)
ID da Ativação:	870
Gerenciamento de projeto:	Battiston Stephanie (SERTIT)
act-value-adders:	Teodoro Hunger (UNITAR/UNOSAT) Konstantin Homenkov (Geoniformation systems) Dalia Laoubi (CSA) NOAA VA (NOAA) BUREAU NATIONAL DE GESTION DES RISQUES ET DES CATASTROPHES (BNGRC) INPE Camila Gonçalves dos Santos (UFRRJ)

Products

Areas affected by flooding located between the municipalities of Fanambana, Morafeno and Manambe

Direitos autorais: INPE (2024)
Map produced by UFRRJ

Information about the Product

Adquirida: 04/04/2024

Fonte: CBERS-4

Categoria: Reference Map

Areas affected by floods in Madagascar

Direitos autorais: RADARSAT Constellation Mission Imagery © Government of Canada (2024) - RADARSAT is an official mark of the Canadian Space Agency
Contains modified Copernicus Sentinel data (2024)
Map produced by The Canadian Space Agency

Information about the Product

Adquirida: Sentinel-1: 24/03/2024
RCM-3: 30/03/2024

Fonte: RCM and Sentinel

Categoria: Delineation Map

Area affected by landslides located between the municipalities of Amboditsoha, Ambohiby and Ankiweb, Madagascar

Direitos autorais: INPE (2024)

Information about the Product

Adquirida: 04/04/2024

Fonte: CBERS-4

Categoria: Reference Map

NOAA downscaled flood depth product over Analovana region

Direitos autorais: NOAA/NPP-N20-N21
Map produced by SSEC

Information about the Product

Adquirida: 01/04/2024

Fonte: NOAA

Categoria: Delineation Map

Preliminary satellite-derived flood assessment, Ambanja District, Diana Region, Madagascar
Download the full report

Direitos autorais: © (2024) DigitalGlobe, Inc., Longmont CO USA 80503. DigitalGlobe and the DigitalGlobe logos are trademarks of DigitalGlobe, Inc. The use and/or dissemination of this data and/or of any product in any way derived there from are restricted. Unauthorized use and/or dissemination is prohibited.
Report produced by UNITAR / UNOSAT

Information about the Product

Adquirida: 04/04/2024

Fonte: WorldView-2

Categoria: Reference Map

Impact map - West Ampisikanana West, Madagasar

Direitos autorais: Includes Pleiades material © CNES (2024), Distribution Airbus DS.
Map produced by ICube-SERTIT

Information about the Product

Adquirida: 02/04/2024

Fonte: Pleiades

Categoria: Grading Map

Impact map - East Ampisikanana, Madagascar

Direitos autorais: Includes Pleiades material © CNES (2024), Distribution Airbus DS.
Map produced by ICube-SERTIT

Information about the Product

Adquirida: 02/04/2024

Fonte: Pleiades

Categoria: Grading Map

Flood impact in Anivorano, Madagascar (AOI ID:1)

Direitos autorais: USGS/NASA Landsat Program
Map produced by Geoinformation Systems

Information about the Product

Adquirida: Landsat 8: 04/04/2024
Landsat 9: 28/05/2023

Fonte: Landsat 8 and Landsat 9

Categoria: Delineation Map

Satellite detected water extent over Sambava and Vohemar Districts, Sava Region, Madagascar

Direitos autorais: © DLR e.V. (2024), Distribution Airbus DS Geo GmbH
Map produced by UNITAR/ UNOSAT

Information about the Product

Adquirida: 01/04/2024

Fonte: TanDEM-X

Categoria: Delineation Map

Impact map- Anjanazana East, Madagascar

Direitos autorais: Includes Pleiades material © CNES (2024), Distribution Airbus DS.
Map produced by ICube-SERTIT

Information about the Product

Adquirida: 31/03/2024

Fonte: Pleiades

Categoria: Grading Map

Impact map - Anjanazana West, Madagascar

Information about the Product

Adquirida: 31/03/2024

Fonte: Pleiades

Categoria: Grading Map

Possible affected croplands, Marivorahona (AOI ID:12), Ambilobe (AOI ID:15)

Direitos autorais: Contains modified Copernicus Sentinel data (2024)
Map produced by Geoinformation Systems

Information about the Product

Adquirida: 29/03/2024 / 17/03/2024

Fonte: Sentinel-1

Categoria: Grading Map

Preliminary satellite-derived flood assessment, Sava & Sofia Regions, Madagascar

Download the full report

Direitos autorais: © Planet Labs Inc. (2024)
© (2024) DigitalGlobe, Inc., Longmont CO USA 80503. DigitalGlobe and the DigitalGlobe logos are trademarks of DigitalGlobe, Inc. The use and/or dissemination of this data and/or of any product in any way derived there from are restricted. Unauthorized use and/or dissemination is prohibited
Report produced by UNITAR / UNOSAT

Information about the Product

Adquirida: PlanetScope: 31/03/2024, 01/04/2024
WorldView-3: 31/03/2024

Fonte: PlanetScope / WorldView-3

Categoria: Reference Map