Echoes from a silent spring

It was a spring without voices. On the mornings that had once throbbed with the dawn chorus of robins, catbirds, doves, jays, wrens, and scores of other bird voices there was now no sound; only silence lay over the fields and woods and marsh. (From Rachel Carson: Silent Spring) The history of life on earth…

Tapping the Bárðarbung

Being considered the world leading authority on something is probably more of a curse than a blessing. All of a sudden you have a reputation to defend and everyone will be annoyed with you when you do not agree with their interpretation about what is happening. To top it off there will be a not…

The Bogoslof eruption

Volcanoes are the tip of an iceberg. 90% of the volcano is hidden, down to the magma chamber 10 km or more below the surface. What we see is only the cone on top of the conduit. The perfect cone of Fuji, or even St Helens (before it blew up), is like the hat on…

Signs and Portents of Iceland

Icelandic volcanoes are all about long term projections. They do not do things in the short run, before any eruptions you will see either several intrusive episodes like at Eyjafjallajökull, or you will see signs of steadily mounting pressure prior to an eruption. For some Icelandic volcanoes these two processes goes on for decades, or…

The forgotten volcanoes of Chad Part II

In the previous part I wrote that we would be investigating some of the largest sub-aerial volcanism on the planet as we took a closer look at this the largest known sub-aerial volcanic system in the world. And now it is time to look at volcanism on a stupendous scale. But before we do that…

Turkana and the Dawn of Man

I readily admit to enjoying large scale volcanism. Yes, small scale volcanism like Tor Zawar may be a fun diversion, but it is the majestic scale that volcanism can take that get my juices flowing.  By now I have touched upon most of the worlds large volcanic features at least in the passing, but there…