For those who have been keeping an eye on any events at Taal in the Philippines, the current unrest won’t come as a surprise. Over the past few months the volcano has become progressively more restless and after the huge emission of SO2 on the 28th, there were several phreatomagmatic events on Thursday, July 1st.…
Rhyolite has more silica, this makes it more viscous, more explosive and in turn more dangerous. Basalt is the opposite, fluid, well-behaved, safe. This could be a phrase out of any geology textbook, I can almost feel some readers getting ahead of me and thinking what I am obliged to say. But there are exceptions!…
Hekla is famous for its short run-ups prior to eruption, typically the run-up involves a smattering of small earthquakes for an hour or so and then it goes boom. Pavlof has the same nasty habit of not announcing upcoming eruptions. At beast you get a few harmonic tremor episodes in the hours prior to an…
Few cities around the world can claim a more beautiful setting than Managua (pop 2.223 million, 2012), Nicaragua, on the shores of tranquil Lago Xolotlán, Lake Managua. When the Conquistadores arrived, Masaya volcano 20 km from today’s Managua was in eruption and provided Europeans with their fist view of a lava lake. In a letter…