Scientists from Columbia University’s Earth Institute will present important research results and special events at the Dec. 9-13 San Francisco meeting of the American Geophysical Union, the world’s largest gathering of earth and space scientists. Here is a guide in rough chronological order.
Ideally, seismic stations are sited in remote, quiet locations. But other considerations are important for a good station, particularly security. As a result, we placed most of our stations in towns near schools, hospitals or town halls, where people could keep an eye on them.
Driving around the Rungwe volcanic province in the southern East Africa Rift installing seismometers, we have the chance to observe first hand how geological processes in action create the most dramatic forms at Earth’s surface.
The last time we visited the southern part of the East Africa Rift, we were responding to an unusual series of earthquakes in December 2009 that shook northern Malawi. This time, we return to this part of the rift system as a part of a more comprehensive effort to understand the underpinnings of this continental rift.
A new study in the journal Nature provides fresh insight into deep-earth processes driving apart huge sections of the earth’s crust. This rifting mostly takes place on seabeds, but can be seen in a few places on land—nowhere more visibly than in the Afar region of northern Ethiopia.
Can shifting tides trigger earthquakes? Research done by Maya Tolstoy, a geophysicist at Lamont-Doherty Earth Observatory, suggests they do.
Experts discuss the rise and boom of unconventional hydrocarbon extraction in the final Sustainable Development Seminar Series of the 2012-2013 academic year.
Earth Institute research expeditions investigating the dynamics of the planet on all levels take place on every continent and every ocean. Most projects originate with our main research center, Lamont-Doherty Earth Observatory, and are often run in collaboration with other institutions.
The last part of our river work was on the Jamuna River, as the Brahmaputra is called south of where if diverges from its former course. It shifted up to 100 km to this course about 200 years ago. We visited Sirajganj where an embankment protects the city from the migrating river and Aricha near the confluence of the Jamuna and Ganges. We ended our journey by standing with one foot in each of these two great rivers.
We traveled to the Brahmaputra River, one of the most active on the planet, to continue our fieldwork. We visited two places while working our way downstream and saw the rapid changes in the river bank and chars (islands). At one ghat (dock) the river had eroded a mile of the coast while in the other it added a similar amount. The chars had moved, appeared, disappeared and reemerged. In this changing environment, the resilient Bangladeshi char people shifted and adapted with the land.