Earthquakes

Christopher Scholz

Top Seismology Award Goes to Pioneer in Rock Mechanics: Christopher Scholz

For his pioneering work in rock mechanics and his skill at communicating earthquake science, Scholz is being honored on April 20 by the Seismological Society of America with its top award, the Harry Fielding Reid Medal.

by |April 20, 2016
A F-35C stealth fighter, similar to one linked to sonic booms off New York, New Jersey and Connecticut. Its top speed is said to be 1,200 miles per hour. (Lockheed Martin)

The Earth Shook, but It Wasn’t an Earthquake

Last Thursday, thousands of people on the Eastern Seaboard felt the earth tremble. Seismologists at Columbia University’s Lamont-Doherty Earth Observatory quickly concluded it was not an earthquake, but a military exercise.

by |February 4, 2016
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Upcoming Scientific Fieldwork, 2016 and Beyond

  On every continent and ocean, Earth Institute field researchers are studying the dynamics of climate, geology, natural hazards and ecology, and their practical applications to modern problems. Below, a list of expeditions in rough chronological order. Work in and around New York City and the U.S. Northeast is listed separately toward bottom. Unless otherwise stated, projects originate with… read more

by |February 2, 2016
Subduction zone mechanics

Ancient Faults & Water Are Sparking Earthquakes Off Alaska

Ancient faults that formed in the ocean floor millions of years ago are feeding earthquakes today along stretches of the Alaska Peninsula, and likely elsewhere, a new study suggests.

by |November 16, 2015
The drillers insert the larger diameter 4" PVC pipe into the well.  Handling the 10 meter pipe is challenging.

Last Sample and Home

We finished our work at the river transect. Now we had one more sample to collect. Alamgir had arranged for drillers at this new site, but they were delayed because of a knife fight between two villages over some property.

by |October 20, 2015
Hammering the OSL sampler, which is at the end of many auger extension rods.  The sampler fits inside the 3" PVC pipe that had been installed.

OSL Samples at Last

The success of the tube wells for drilling and obtaining samples was a great boon to our field program. We drilled three additional tube wells to complete a five-well transect across the abandoned river valley. When we date the samples, we will find out if the river switched position suddenly, possibly from an earthquake.

by |October 20, 2015
Standing ankle deep in mud by the resistivity meter.  The smokestack of the brick factory can be seen in the distance.

Tubewells to the Rescue

The resistivity testing was hampered by bad roads and flooded fields. The augering was proving similarly difficult in the thick muds of the abandoned channel. It was time to change to our alternative plan: drilling with tube wells. That worked better and we had turned a corner.

by |October 17, 2015
The large abandoned channel we hoped to work in is completely flooded.

Pani, Pani Everywhere

Heading out to our field area, we discovered that the abandoned river valley we planned to study was completely flooded. There was pani—the Bangla word for water—everywhere.

by |October 14, 2015
The Taj Mahal. You can see its enormous size from the line of people waiting to get inside standing on the pedestal. The line completely circled the tomb on this holiday weekend.

Bangladesh and India, Too

Returning to Bangladesh for additional fieldwork, I stopped off in India for several meetings, but we found time for some sightseeing, too. We were able to see the Qutub Minar complex in Delhi as well as the Taj Mahal and Agra Fort in Agra. Plus all the meetings in Delhi, Kolkata and Dhaka were very successful.

by |October 13, 2015
Map of hazards data points

Mapping Tool Lets Users Pinpoint Hazards Data

The SEDAC Hazards Mapper is designed for disaster risk managers, humanitarian response organizations, public health professionals, journalists and others needing a quick assessment of the potential dangers posed by a major hazardous event or developing emergency.