. This is not to say we shouldn’t watch Katla, but all these swarms are still (1) too small; (2) too shallow and; (3) too short. I would place a safe bet that there are many more volcanoes worldwide that are much closer to eruption than Katla – and the connection between Eyjafjallajökull and Katla is tenuous at best. So relax!n
Now, when was the last time you saw a Smithsonian/USGS GVP Weekly Volcanic Report with so little new activity? It is indeed a quiet summer for volcanoes – or maybe this is just in comparison to the Iceland furor of earlier this year. However, the latest report does talk about increasing signs that Gorely may be headed for an eruption and a possible eruption at Nevado del Ruiz in Colombia! There are few details of this event beyond a seismic signal that suggests an explosion, but no ash was seen after the clouds allowed for direct observation. I’ll be keeping a close eye on this if Ruiz is becoming active after 20 years of quiet.
Finally, be sure to check out the excellent article on Yellowstone over at the new home of Highly Allochthonous. It is a great primer for folks who want to know why the caldera is there and see some of the great volcanic features – but I would say that the Hawaii-Emporer Seamount chain is Yellowstone’s evil twin (rather than vice versa as Anne and Chris say) – Yellowstone is just cleaning up all those mountains that crumpled North America!