Research results from NASA-funded science team led by James B. Garvin (NASA GSFC), Daniel A. Slayback (SSAI), Vicki Ferrini (Columbia) recently submitted for publication in the AGU's Geophysical Research Letters journal suggest the island's lifetime may be extended for another 25-30 years if geochemical fortification continues to protect key regions. The HTHH island is the first surtseyan eruption-based island to have persisted as \"new land\" for more than 6 months since Surtsey erupted near Iceland in 1963. Studies of the landscape evolution of pristine volcanic islands of this variety previously relied on a combination of aerial photography, field mapping, and laboratory sample analysis, but this new work enables an optimized approach via advanced satellite optical and radar imaging in combination with ship-based bathymetric mapping. Results of this work can be applied to understanding numerous small volcanic landforms on Mars whose formation may have been in shallow-water environments during epochs when persistent surface water was present.
Field photography and sampling of the HTHH island \"system\" by French sailors who served as citizen geoscientists for the NASA project greatly enhanced the project and validated several key interpretations.
(Special thanks to NASA Earth Sciences RRNES program, French sailors Damien Grouille and Cecile Sabau of the sailing vessel Colibri, and to the Schmidt Ocean Institute R/V Falkor).",
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"url": "https://svs.gsfc.nasa.gov/vis/a010000/a012800/a012800/NewTongaIsland_Long_print.jpg",
"filename": "NewTongaIsland_Long_print.jpg",
"media_type": "Image",
"alt_text": "Music: Fountain by Mailcoat Sheppard; Data Visions by Pike; Guilty Curiosity by Brice Davoli; Concerning Nymphs by Hammond Roberts. Complete transcript available.",
"width": 1024,
"height": 573,
"pixels": 586752
}
}
],
"newer_versions": [
{
"id": 4726,
"url": "https://svs.gsfc.nasa.gov/4726/",
"page_type": "Visualization",
"title": "New Island forms in Tonga (Updated)",
"description": "This visualization shows the evolution Tonga's new island between January 2015 and March 2018. || Tonga_evolutn.1300_print.jpg (1024x576) [129.1 KB] || Tonga_evolutn.1300_searchweb.png (320x180) [84.2 KB] || Tonga_evolutn.1300_web.png (320x180) [84.2 KB] || Tonga_evolutn_Wcredits_1080p30.mp4 (1920x1080) [43.0 MB] || Tonga_evolutn_Wcredits_1080p30_h265.mp4 (1920x1080) [17.9 MB] || Tonga_evolutn_Wcredits_1080p30.webm (1920x1080) [5.8 MB] || Tonga_evolutn_Wcredits_2160p30_h265.mp4 (3840x2160) [50.9 MB] || 3840x2160_16x9_30p (3840x2160) [0 Item(s)] || Tonga_evolutn_Wcredits_2160p30.mp4 (3840x2160) [140.4 MB] || Tonga_evolutn_Wcredits_1080p30_h265.mp4.hwshow || ",
"release_date": "2019-03-27T00:00:00-04:00",
"update_date": "2025-06-20T00:09:20.338284-04:00",
"main_image": {
"id": 396946,
"url": "https://svs.gsfc.nasa.gov/vis/a000000/a004700/a004726/Tonga-20-Mar-2018.1320_print.jpg",
"filename": "Tonga-20-Mar-2018.1320_print.jpg",
"media_type": "Image",
"alt_text": "This image shows a 3D representation of the island informally known as Hunga Tonga Hunga Ha'apa on March 20,2018 as created from Digital Globe satellite imagery.",
"width": 1024,
"height": 576,
"pixels": 589824
}
}
],
"older_versions": [],
"alternate_versions": []
}