One out of 3 people in the world is exposed to earthquakes, a number which almost doubled in the past 40 years; around 1 billion in 155 countries are exposed to floods according to the Atlas

Fine ash produced during explosive volcanic eruptions can be dispersed over a vast area, where it poses a threat to aviation, human health and infrastructure. Here, we focus on northern Europe, which lies in the principal transport direction for volcanic ash from Iceland, one of the most active volcanic regions in the world. We interrogate existing and newly produced geological and written records of past ash fallout over northern Europe in the last 1000 years and estimate the mean return (repose) interval of a volcanic ash cloud over the region to be 44±7 years.

The Popocatépetl volcano in Mexico has been under observation since it violently spewed ash vertically into the air, startling locals.

Aside of immediate impacts, the 2011 Puyehue–Cordón Caulle volcano (PCC) eruption also caused persisting chemical impacts. By 2012, toxicity resulted in overt dental fluorosis in deer, with bone fluoride increasing > 38-fold to 5175 ppm. Sheep, horses and cattle also succumbed to fluorosis. Due to eolian redeposition of tephra, exposure of ruminants continued, bone fluoride reached 10 396 ppm, and by 2014 skeletal fluorosis was found.

Original Source

Hundreds of climbers have been brought down safely from the slopes of an Indonesian volcano that erupted this week, the disaster agency said on Thursday, although the fate of several daredevil tour

SAN JOSE – The Turrialba volcano in central Costa Rica continued to emit gas and ash on Tuesday, forcing the airport that serves the capital city of San Jose to remain closed.

The Piton de la Fournaise volcano on the Reunion Island erupted on Sunday (September 11), a surprise treat for some lucky 250 locals and tourists who happened to be hiking on trails nearby.

Volcanic mudflows, called 'lahars', can cause large amounts of damage to buildings. In this research we have developed a method to estimate lahar induced building damage based on the height, speed and amount of volcanic material in the lahar. This method was applied to a small region in Arequipa, Peru, where computer models were used to estimate the number of buildings affected by lahars. The research found that building location and the size of the flow are most important in determining damage.

Two unusually large earthquakes hit one of Iceland's biggest volcanoes early on Monday, raising concerns of a possible eruption, the Icelandic Met Office said.

Eruptive activity at Turrialba Volcano (Costa Rica) has escalated significantly since 2014, causing airport and school closures in the capital city of San José. Whether or not new magma is involved in the current unrest seems probable but remains a matter of debate as ash deposits are dominated by hydrothermal material. Here we use high-frequency gas monitoring to track the behavior of the volcano between 2014 and 2015 and to decipher magmatic versus hydrothermal contributions to the eruptions.