latest news: Volcanoes
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Two distinct mechanisms of fluoride enrichment and associated health risk in springs’ water near an inactive volcano, southeast Iran
Highlights The highest fluoride concentrations were observed in the eastern cold springs. Reaction of fluorite mineral with HCO3was likely to cause fluoride enrichment in the eastern springs. In the western and thermal springs, origin of fluoride was related to weathering of F-bearing silicate minerals. Health risk of fluoride in drinking waters were in the following […]
Iran Volcanoes -
Fluoride levels in supply water from a volcanic area in the Macaronesia region.
Abstract Fluoride is a widely distributed ion in the environment and, consequently, in water as well. High levels of fluoride in waters can be found in the Canary Islands because of their volcanic origin. Due to the risk and detrimental effects associated with a high fluoride intake, the content of this ion has been potentiometrically […]
Canary Islands Volcanoes -
Taal Volcano: DOH advises public to stay indoors, use dust masks vs Taal ashfall
The Department of Health (DOH) on Sunday released guidelines on how to deal with an ashfall following the phreatic explosion at the Taal Volcano. In an advisory, the DOH explained that “volcanic ash consists of powder-size to sand-size particles that have been blown into the air by an erupting volcano.” Exposure to this ash may […]
Philippines Volcanoes -
Taal Volcano: What are the harmful effects of volcanic ash to your health
Department of Health (DOH) issued an advisory after the Taal Volcano erupted on Sunday, warning the public on the possible health effects of volcanic ash. According to the DOH advisory, volcanic ash has carbon dioxide and fluorine which can cause numerous harmful health effects to a person when exposed to it. Some of the effects […]
Philippines Volcanoes -
Taal Volcano spews ash in phreatic eruption —PHIVOLCS
Philippine Institute of Volcanology and Seismology director Renato Solidum said the Taal Vocano in Batangas spewed ashes in phreatic eruption on Sunday morning due to hydro-thermal activities. Photo courtesy of Harry Penano Interviewed on Dobol B sa News TV, Undersecretary Solidum said that a phreatic eruption was recorded at around 11:00 a.m. “Nagkaroon nga […]
Philippines Volcanoes -
Taal Volcano: Pyroclastic density currents, volcanic tsunami likely around Taal –PHIVOLCS
The Philippine Institute of Volcanology and Seismology has raised the alert status in Taal Volcano to Alert Level 3 from Alert Level 2, according to the agency’s 4 p.m. Sunday bulletin. It also confirmed that there was a magmatic intrusion that is likely the cause of the volcano’s phreatic eruptions on Sunday morning and afternoon. […]
Philippines Volcanoes -
Bubbles and Dust: Experimental Results of Dissolution Rates of Metal Salts and Glasses From Volcanic Ash Deposits in Terms of Surface Area, Chemistry, and Human Health Impacts.
Abstract Explosive volcanic eruptions lead to ash deposition and subsequent leaching of contaminants into soils or surface water, impacting flora and fauna, including human health. This study determined the control of ash surface area and chemical composition on ash dissolution rates. Fresh, unhydrated ash samples from four contrasting volcanoes were analyzed in the laboratory. Column […]
International Volcanoes -
Shape of volcanic ash influences contamination of water sources in volcanically active regions
Kilauea, a famous Hawaiian volcano [see photo], erupts lava and basaltic ash that has high concentrations of fluorine. Credit: M. Patrick, USGS Contaminants from volcanic eruptions leach into water at different rates depending on the shape of the volcanic ash particles, according to new research that could enhancing scientists’ ability to predict water quality risk […]
International Volcanoes -
Co-occurrence, possible origin, and health-risk assessment of arsenic and fluoride in drinking water sources in Mexico: Geographical data visualization.
Highlights A groundwater arsenic-fluoride concentration map highlights enrichment zones. Volcanic glass is likely a primary source of arsenic-fluoride contaminated water. Evaporation in (semi)arid areas concentrates arsenic-fluoride in aquifers The states of Durango, San Luis Potosí, and Zacatecas have higher exposure risk Abstract Arsenic and fluoride in drinking water present a significant challenge to public health […]
Mexico Volcanoes -
The Bagana volcano in Papua New Guinea
A Kiwi scientist is about to get an up-close-and-personal look at one of the world’s angriest volcanoes, through a clever approach now also being used here. Rising to 1750m above the Papua New Guinea island of Bougainville – or roughly the same height as Mt Hikurangi on New Zealand’s East Coast – Bagana is one […]
Papua New Guinea Volcanoes