Tonga Volcano Eruption 2022
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The uninhabited volcanic island of Hunga-Tonga-Hunga-Ha'apai all but disappeared following the early January 2022 blast, according to satellite images from around 12 hours later. The Pacific archipelago was blanketed in ash and volcanic ash clouds spread to countries thousands of kilometres to the west.

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From The Prow | 9 June 2022

AGU and the Seismological Society of America update comprehensive nuclear-test ban treaty position

In April, AGU’s Board approved minor updates to the position statement entitled, “The capability to monitor the comprehensive...

AGU Fall Meeting 2021 | 16 December 2021

3D seismic velocity structure of the Tonga subduction zone constrained by body-wave tomography

Wiens + Aubreya Nicole Adams + Songqiao Shawn Wei

The Tonga subduction zone hosts about two-thirds of the world’s deep-focused earthquakes (300-700 km) and represents the cold endmember of global subduction zones. Previous...

Geophysical Research Letters VOL.45 ISSUE 8 | 20 April 2018

Monitoring and Modeling the Rapid Evolution of Earth's Newest Volcanic Island: Hunga Tonga Hunga Ha'apai (Tonga) Using High Spatial Resolution Satellite Observations

James Brian Garvin + Christine Giguere + Daniel A Slayback ...

We have monitored a newly erupted volcanic island in the Kingdom of Tonga, unofficially known as Hunga Tonga Hunga Ha'apai, by means of relatively frequent high spatial resolution...

AGU Fall Meeting 2018 | 14 December 2018

Topographic Evolution of Oceanic Islands : Case Study of Hunga Tonga Hunga Ha'apai, Tonga

James Brian Garvin + Daniel A Slayback + Vicki Lynn Ferrini

Small, recently-formed oceanic islands offer opportunities to measure landscape erosion in action at new spatial scales thanks to the availability of Digital Elevation Model...

Geophysical Research Letters VOL.48 ISSUE 7 | 9 April 2021

Tonga Slab Morphology and Stress Variations Controlled by a Relic Slab: Implications for Deep Earthquakes in the Tonga‐Fiji Region

Hao Liu + Gurnis + Zhan ...

Deep focus earthquakes within the Tonga‐Fiji subduction system account for about two‐thirds of the global total and provide significant constraints on slab deformation....