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Cyclone Gita in Tonga

Monday, 12 February 2018

Type of Event:
Ocean Storm - Cyclone
Location of Event:
Tonga
Date of Charter Activation:
2018-02-12
Time of Charter Activation:
09:28
Time zone of Charter Activation:
UTC+01:00
Charter Requestor:
UNITAR-UNOSAT on behalf of United Nations Office for the Coordination of Humanitarian Affairs (OCHA) | Regional Office for Asia and the Pacific (ROAP)
Activation ID:
566
Project Management:
UNITAR/UNOSAT

Description of the event

Cyclone Gita, a Category 4 storm, hit Tonga on 12 February after causing widespread damage in the neighbouring island of Samoa. The eye of the storm passed over Tongatapu island, the most populous island group in Tonga, causing one fatalitly and injuring 33.

The National Emergency Management Office (NEMO) reported that 79% of the population had been affected, and confirmed Gita as the strongest storm to his the islands on record. Over 100 evacuation centres were prepared to house over 4500 evacuees as the Tongan government declared a state of emergency.

Gita caused extensive flooding in low lying, coastal and river areas around Savai'I and Upolu and further widesread flooding in the Vaisigano catchment area with thousands of properties being damaged.

The storm  affected Tonga's power supply, with authorities confirming that Tongatapu was without power after winds exceeding 190 mph damaged infrastructure, leaving hospitals only remaining operational through generators.

By the 15 February the storm moved south-southwest away from Tonga heading towards New Caledonia.

Grading map of Veitongo on Tongatapu Island

See more from Copernicus EMS

Source: Pleiades / WorldView-2
Acquired: Pleiades: 05/08/2017 and 15/02/2018
WorldView-2: 13/02/2018

Copyright: Pleiades © CNES (2018) - Distribution: Airbus Defence and Space, all rights reserved
WorldView-2 © DigitalGlobe Inc.
Map produced by e-GEOS

Grading map of Houma on Tongatapu Island

See more from Copernicus EMS

Source: Pleiades
Acquired: Pre-disaster: 05/08/2017
Post-disaster: 15/02/2018

Copyright: Pleiades © CNES (2018) - Distribution: Airbus Defence and Space, all rights reserved
Map produced by e-GEOS

GITA-18: Comprehensive Satellite Detected Building Damage Assessment Overview As Of 28 February 2018

Download the full report

Source: Pleiades / WorldView-2 / WorldView-3
Acquired: Pleiades: 14/02/2018, 15/02/2018, 16/02/2018 and 21/02/2018
WorldView-3: 12/01/2018
WorldView-2: 13/02/2018

Copyright: Pleiades © CNES (2018) - Distribution: Airbus Defence and Space, all rights reserved
WorldView-2 © DigitalGlobe Inc.
WorldView-3 © DigitalGlobe Inc.

Map produced by UNITAR/UNOSAT

Damage assessment of Fatumu, Haveluliku, Pelehake, in Tongatapu Island

Source: Pleiades / WorldView-3
Acquired: Pleiades: 21/02/2018
WorldView-3: 12/01/2018

Copyright: Pleiades © CNES (2018) - Distribution: Airbus Defence and Space, all rights reserved
WorldView-3 © DigitalGlobe Inc.
Map produced by UNITAR/UNOSAT

Damage assessment of Cultural Heritage Sites in Tongatapu Island

Download the full report

Source: Pleiades / WorldView-3
Acquired: Pleiades: 15/02/2018 and 16/02/2018
WorldView-3: 12/01/2018

Copyright: Pleiades © CNES (2018) - Distribution: Airbus Defence and Space, all rights reserved
WorldView-3 © DigitalGlobe Inc.
Map produced by UNITAR/UNOSAT

Damage assessment of eastern Nuku-alofa, Tongatapu Island

Source: Pleiades / WorldView-3
Acquired: Pleiades: 15/02/2018
WorldView-3: 12/01/2018

Copyright: Pleiades © CNES (2018) - Distribution: Airbus Defence and Space, all rights reserved
WorldView-3 © DigitalGlobe Inc.
Map produced by UNITAR/UNOSAT

Damage assessment of the towns of Holonga, Malapo, Vaini, Longoteme and Fohala, Tongatapu Island

Source: WorldView-3 / Pleiades
Acquired: WorldView-3: 12/01/2018
Pleiades: 15/02/2018

Copyright: WorldView-3 © DigitalGlobe Inc.
Pleiades © CNES (2018) - Distribution: Airbus Defence and Space, all rights reserved
Map produced by UNITAR/UNOSAT

Damage assessment of Fua amotu town and airport, Tongatapu Island

Source: WorldView-3 / Pleiades
Acquired: WorldView-3: 12/01/2018
Pleiades: 16/02/2018

Copyright: WorldView-3 © DigitalGlobe Inc.
Pleiades © CNES (2018) - Distribution: Airbus Defence and Space, all rights reserved
Map produced by UNITAR/UNOSAT

Damage assessment of the towns of Nukuleka, Hoi, Mua & Alaki, on Tongatapu Island

Source: WorldView-3 / Pleiades
Acquired: WorldView-3: 12/01/2018
Pleiades: 15/02/2018 and 16/02/2018

Copyright: WorldView-3 © DigitalGlobe Inc.
Pleiades © CNES (2018) - Distribution: Airbus Defence and Space, all rights reserved
Map produced by UNITAR/UNOSAT

Damage assessment of Tongatapu Island

Source: WorldView-2 / WorldView-3 / Pleiades
Acquired: WorldView-2: 13/02/2018
WorldView-3: 12/01/2018
Pleiades: 14/02/2018

Copyright: WorldView-2 and -3 © DigitalGlobe Inc.
Pleiades © CNES (2018) - Distribution: Airbus Defence and Space, all rights reserved
Map produced by UNITAR/UNOSAT

Damage assessment of Hamula, Lavengatonga and Nakolo towns on Tongatapu island

Source: WorldView-2
Acquired: 13/02/2018

Copyright: WorldView-2 © DigitalGlobe Inc.
Map produced by UNITAR/UNOSAT

Damage assessment of Eua Island

Source: GeoEye-1 / WorldView-2
Acquired: GeoEye-1: 28/06/2017
WorldView-2: 13/02/2018

Copyright: GeoEye-1 and WorldView-2 © DigitalGlobe Inc.
Map produced by UNITAR/UNOSAT