volcanic
-
Earth
Large magma body under the dormant volcanic, amazing scientists
The distribution of earthquakes and receivers function from stations away from the cascade volcano. Credit: Nature Geoscience (2025). Doi: 10.1038/S41561-024-01630-Y The new Cornel University LED research is an active volcano expelled during the eruption, and has a long belief that it has a large magma body that breaks down over time as the volcano is dormant. Researchers have used seismic…
Read More » -
Earth
Melting Antarctic ice sheet could trigger larger volcanic eruptions
Schematic diagram of the thermomechanical magma chamber model simulating ice release obtained in this study. Transparent arrows represent ice export as a decrease in ice layer thickness over time. Credit: Geochemistry, Geophysics and Earth Systems (2024). DOI: 10.1029/2024GC011743 Melting ice sheets are often synonymous with climate change in the media, with evocative images of a lone polar bear floating on…
Read More » -
Environment
Massive volcanic eruptions were not the cause of dinosaur extinction, climate scientists say
Paleogeographic context of North America highlighting study locations alongside physical stratigraphy, MBT’5me, and bulk organic δ13C records from West Bijou (blue) and Pyramid Butte (orange). Credit: Science Advances (2024). DOI: 10.1126/sciadv.ado5478 A massive volcanic eruption on the Indian peninsula has long been proposed as an alternative cause of the dinosaur extinction. This phase of active volcanism occurred 66 million years…
Read More » -
Earth
Volcanic ash as a nutrient source: the impact of the Hunga Tonga eruption on the South Pacific ecosystem
GEOTRACES GP21 cruise track and Hunga Tonga Hunga Ha’apai (HTHH) volcanic eruption scattering volcanic ash. Credit: Nature Communications (2024). DOI: 10.1038/s41467-024-52904-3 The January 2022 eruption of Hunga Tonga Hunga Ha’apai (HTHH) released approximately 2.9 billion tons of volcanic material into the atmosphere and across the South Pacific. In early 2022, a scientific expedition (GEOTRACES GP21) investigated the impact of this…
Read More » -
Earth
Easter Island’s volcanic history suggests that Earth’s mantle behaves very differently than previously assumed
The structure of the mantle plume beneath Easter Island. Credit: Douwe van Hinsbergen Geography textbooks describe the Earth’s mantle, which lies beneath the plates, as a well-mixed, viscous rock that moves with the plates like a conveyor belt. But this idea was first broached about 100 years ago, and it’s surprisingly difficult to prove. A mysterious discovery on Easter Island,…
Read More » -
Earth
Tonga’s volcanic eruption was caused by an explosion equivalent to ‘five underground nuclear bombs,’ new study reveals
Mr. Jinyin Hu and Dr. Thanh-Son Phạm. Credit: Jamie Kidston/ANU Two years on, new research from the Australian National University (ANU) has revealed the main trigger of one of the largest volcanic eruptions in history, the Hunga Tonga submarine volcano. The study is published in the journal Geophysical Research Letters. Until now, the cause of this disaster has remained a…
Read More »
