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Displaying 15 of about 490 resultsCan a volcano erupt after tens of thousands of years of dormancy? If so, how can this be explained and what makes volcanic eruptions more dangerous, i.e. explosive? These are key questions in volcanic hazard assessment and can also draw attention to volcanoes that appear to be inactive. Even in a quiet dormant phase, a volcano can rapidly become active…
[...]One of our planet's large undersea volcanoes, the Hunga Volcano in the South Pacific, astonished scientists when it erupted in January 2022. The blast sent pressure waves around the planet. It blew a whopping 58,000 swimming pools worth of water into the atmosphere — an unprecedented amount. And the explosion's plume of ash and water reached over 3…
University of Queensland researchers have optimised a new technique to help forecast how volcanoes will behave, which could save lives and property around the world.Dr Teresa Ubide from UQ’s School of the Environment and a team of international collaborators have trialled a new application of the tongue-twisting approach: laser ablation inductively coup…
Listen to the podcastHow Pacific countries are learning more about early warning systems from the Tongan volcanic eruption and tsunami in 2022.Also, the importance of maintaining messages for natural disasters in the Pacific and how to make sure they break through.And how Timor Leste journalists feel the pressure when it comes to reporting on disasters…
An international team has used satellite- and ground-based ionospheric observations to demonstrate that an air pressure wave triggered by volcanic eruptions could produce an equatorial plasma bubble (EPB) in the ionosphere, severely disrupting satellite-based communications. Their findings were published in the journal Scientific Reports.The ionosphere…
Indonesian scientists fulfill the need for earthquake education on islands replete with tectonic-related hazards, starting with North Sulawesi. Indonesia is an archipelago that consists of 18,108 islands that straddle the Pacific and Indian oceans. Most archipelagoes, including Indonesia, are formed when tectonic processes generate a chain of volca…
Detailed analysis of the January 2022 event shows how underwater blasts generated huge waves that battered coastlines throughout the island nation.The events following last year’s massive eruption of an underwater volcano in the island nation of Tonga have been reconstructed in a simulation that captures how the resulting tsunami spread throughout the r…
New research reveals more about the magnitude of January eruption, as researchers call for better preparedness
The eruption of the Hunga Tonga-Hunga Ha’apai volcano in January created an initial wave 90 metres high – almost the height of the Statue of Liberty (93m)
University of Bath tsunami expert calls for better warning systems to detect volcanic…
The International Federation of Red Cross and Red Crescent Societies (IFRC) has officially approved two new Early Action Plans (EAPs): the EAP for Floods associated with Tropical Storms in Honduras, and the EAP for Volcanic Ashfall in Costa Rica. As a result, 2,700 Honduran families and 2,400 Costa Rican families will be able to anticipate the impacts o…
Small Island Developing States (SIDS) are incredibly vulnerable to intensifying hazards from climate change. But the challenges that SIDS face in adapting can only be understood by looking at how these impacts interact with other risks – not all of them environmental.
A dire example of this is the recent eruption of the Hunga Tonga-Hunga Ha’a…
Tsunamis are surface water gravity waves originating from the sudden displacement of water occurring in an earthquake, volcanic crater collapse, or underwater landslide. The local propagation speed of tsunamis is given by the square root of g.H, where g is the acceleration of gravity and H is the local water depth. As the water depth of the oceans is we…
The recent eruption on La Palma, in the Canary Islands, has stimulated speculation that the volcano might collapse, creating a tsunami that would devastate the east coast of North and South America. But is such a scenario possible or likely?
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The Canary Islands “mega-tsunami” scenario assumed a single, coherent, massive collapse block that reache…
In the shadow of a deadly eruption in 2021, students in Goma, Democratic Republic of the Congo, are learning about future hazards.Memories of the glow emanating from the top of Congo’s Mount Nyiragongo volcano have not been forgotten by those living nearby. At the volcano’s summit is a lava lake that lights up the night sky like a beacon. In May 2021, a…
On the evening of January 15, the Kingdom of Tonga witnessed the violent eruption of the underwater Hunga Tonga-Hunga Ha'apai volcano, sending shockwaves and tsunamis across the Pacific and beyond. Within a few hours, the South Pacific archipelago was blanketed by a thick layer of smoke and ash. Entire towns were left inundated by the waves that also wi…
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Money is so short at the Goma Volcano Observatory (GVO) that staff members complained of sometimes lacking fuel for field trips, having computers that can’t process hefty data sets, and wearing faulty masks that don’t protect them from gases spewed out by Mount Nyiragongo.
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The volcanologists have also faced health risks as a consequence o…