Geobulletin alpha

The mysterious grooves on Barcena volcano 

Furrows on the flank of Barcena filmed Sept. 12, 1952. Barcena volcano was born on August 1, 1952, on Isla San Benedicto, located about 300 nautical miles off the west coast of Mexico and over 8 months a cone was built and its exterior became furrowed with a fairly unique set of furrows (grooves) (Richards, 1959). The process that created the furrows is still not understood. I review here the history of the eruption and in a later post, I will review speculations on the origin of the [...]

After the Deluge: Dam! We Almost Lost a Dam! 

But for the vagaries of the weather, we would never have seen it. Running field studies courses in the winter and spring always involves an element of chance, but in the dry year that we've had, it seemed safe enough to schedule a trip to Yosemite National Park in early April. But as the previous two posts have shown, an epic atmospheric river storm, a Pineapple Express, pummeled the area