Kolumbo Volcano – Theras younger brother

Kolumbo is an active submarine volcano in the Aegean Sea, about 300  7 km northeast of Cape Kolumbo, Santorini  Island.  It is the largest of a line of about twenty submarine volcanic cones extending to the northeast from Santorini.  It is about 3 km in diameter with a crater 1.5 km across.  Previous to the newly discovered Tamu Massif volcano in the northern…

Kasatochi – a One-Hit Wonder?

In August 2008, a small volcanic island in the central Aleutians erupted for a day.  The eruption was a VEI 4, resurfaced the island with pyroclastic flows, increased the area of the island by around 40%, and killed almost everything living on it.  Pyroclastic flows entered the surrounding sea and buried kelp beds surrounding most…

Red alert at Copahue

Earlier today the authorities in Chile raised the alert lever for Copahue to level Red. This was prompted by an increase of seismic signals such as low frequency magmatic Earthquakes. A sign of the pressure rapidly increasing inside the volcano. The authorities have declared that the exclusion zone will be increased to 25 kilometers from…

Ruminarian III – Holey Musings (calderas)

Where to start where to start… It’s pretty messed up when you have two or three related topics buzzing around and you don’t know how to either piece them together, or how to talk about one without spoiling another. I guess the first thing to talk about… are craters. When stuff is ejected from the…