What is Big Think?  

We are Big Idea Hunters…

We live in a time of information abundance, which far too many of us see as information overload. With the sum total of human knowledge, past and present, at our fingertips, we’re faced with a crisis of attention: which ideas should we engage with, and why? Big Think is an evolving roadmap to the best thinking on the planet — the ideas that can help you think flexibly and act decisively in a multivariate world.

A word about Big Ideas and Themes — The architecture of Big Think

Big ideas are lenses for envisioning the future. Every article and video on bigthink.com and on our learning platforms is based on an emerging “big idea” that is significant, widely relevant, and actionable. We’re sifting the noise for the questions and insights that have the power to change all of our lives, for decades to come. For example, reverse-engineering is a big idea in that the concept is increasingly useful across multiple disciplines, from education to nanotechnology.

Themes are the seven broad umbrellas under which we organize the hundreds of big ideas that populate Big Think. They include New World Order, Earth and Beyond, 21st Century Living, Going Mental, Extreme Biology, Power and Influence, and Inventing the Future.

Big Think Features:

12,000+ Expert Videos

1

Browse videos featuring experts across a wide range of disciplines, from personal health to business leadership to neuroscience.

Watch videos

World Renowned Bloggers

2

Big Think’s contributors offer expert analysis of the big ideas behind the news.

Go to blogs

Big Think Edge

3

Big Think’s Edge learning platform for career mentorship and professional development provides engaging and actionable courses delivered by the people who are shaping our future.

Find out more
Close

New images of activity in Africa: Nyiragongo and Dallol

February 4, 2011, 2:20 PM
Dal11_0269

We haven't talked too much about volcanic activity in Africa lately, but that doesn't mean nothing is happening. I had a couple galleries of images come through my inbox in the last couple weeks that show some of the dynamic activity at two of the most active volcanic areas in Africa: Nyiragongo in the Republic of the Congo and Dallol in Ethiopia. Both volcanoes are part of the East African Rift. Nyiragongo has seen much activity over the last few decades including lava flows that have reached the city of Goma and its crater has an active lava lake while Dallol has been relatively quiet since its last known eruption in 1926, but has persistent fumarolic and hot spring activity.

Photovolcanica has posted a series of new images from Dallol that capture the current activity at the hot spring in late January 2011. This set includes pictures from 2002, 2008 and now 2011, showing the changes in the activity at the hot springs and geysers at Dallol (see below and top left). The crew noted that currently there is high activity at the Dallol hydrothermal area, likely due to increased rainfall bringing more water to the system, but many of the hot springs were larger than in previous years. There are some quite impressive hydrothermal features at Dallol, including large deposits of silica, sulfur, iron and other dissolved elements from the hot springs.

Hot springs at Dallol in Ethopia seen in late January 2011. Image from Photovolcanica.

On the other side of the continent, VolcanoDiscovery has a large collection of new images from the the summit region at Nyiragongo in the Congo seen in mid-January 2011. The lava lake looks healthy as ever (see below), with a pronounced crust at times but plenty of fountaining and spattering from vents in the main crater. All in all, it seems that even out of the news, there is plenty of volcanic activity at Nyiragongo.

The lava lake in the summit crater at Nyiragongo as seen on January 11, 2011. Image from VolcanoDiscovery.

Top left: A hydrothermal deposit at Dallol in Ethiopia, seen in late January 2011. Image from Photovolcanica.

 

New images of activity in A...

Newsletter: Share: