Rocks and ice are slip-sliding away in the LDEO Rock Mechanics lab.
Centers, Projects & Initiatives
SG&T scientists employ a broad spectrum of tools and techniques to develop a better understanding of the mechanics and dynamics of earthquakes and faulting. These techniques include labor
Our project will focus on the subduction zone off southern Alaska, which produces large and destructive earthquakes.
A project using multichannel seismic reflection data collected on research cruises in the Marmara Sea to study the earthquake hazard and basin growth along a continental transform fault, the North
A multidisciplinary team of scientists undertook a 20-day research cruise on the Research Vessel Endeavor to map the effects of the Haitian earthquake offshore.
This project is a collaboration between several US and Turkish research institutes to study the tectonics of the Marmara Sea.
Our Ocean Bottom Seismology (OBS) Laboratory develops and operates cutting-edge instrumentation for measuring deformation of the ocean floor in a variety of experimental settings. One of our prima
Earthquakes, volcanoes, landslides, floods, drought, cyclones and other natural hazards have significant potential to affect human lives and society.
Earthquakes in Greater New York-Philadelphia Area: Catalog 1677 to 2005 and Tectonic Setting
Historical data for I.G.Y. Calibration. The original is by H. Miller.
We mapped the surface trace of the fault rupture for about 5 km on the west bank of the Khunar River, through Balakot and into the Sarash Valley where it apparently ends.
Deployment of a wide-band OBS in the Gulf of California from the R/V New Horizon in Oct 2005. Seismometer is housed in the green sphere, while recording, power, and communications devices are encl
We propose a passive broad-band seismic experiment in northwestern Canada, a setting in which fundamental questions regarding the structure and dynamics of the mantle's upper and lower boundary lay
Lamont has been a pioneer in the design, deployment, and utilization of global seismographic networks. This document details an early study of long period seismograph calibrations.
|Name||Title||Fields of interest|
|Tarini Bhatnagar||Graduate Student|
|Nicholas van der Elst||Postdoctoral Research Scientist|
|Tobias Diehl||Postdoctoral Research Scientist||Seismology, Earthquake Location, Local Earthquake Tomography, Signal Processing, Tectonophysics, Geodynamics|
|Joshua Calkins||Adjunct Associate Research Scientist||earthquake seismology, tectonics, lithospheric structure, subduction zones|
|Paul G. Richards||Special Research Scientist||Theory of seismic wave propagation, the physics of earthquakes, the Earth's inner core, improvements in estimating earthquake locations, monitoring underground nuclear explosions, nuclear arms control|
|Leonardo Seeber||Lamont Research Professor|
|Arthur L. Lerner-Lam||Deputy Director||Seismology; focus on upper mantle structures.|
|Klaus H. Jacob||Special Research Scientist||seismology, engineering seismology, climate change adaptation, disaster risk management, loss modeling, quantitative hazard assessment and mapping|
|James Gaherty||Lamont Research Professor||Earthquake Seismology, Geodynamics|
|Felix Waldhauser||Lamont Research Professor||earthquake seismology, seismotectonics of active plate boundaries, real-time seismology|
|Göran Ekström||Professor||Göran Ekström's main research interest is global earthquake seismology. This includes the detailed study of individual earthquake ruptures, and the relationship between seismicity and the large scale tectonic deformation of the crust and mantle over geolo|
|Delwayne R. Bohnenstiehl||Adjunct Associate Research Scientist||Seismotectonic Processes at Mid-Ocean Ridges, Passive Underwater Acoustics|
|Ashley Shuler||Graduate Research Assistant||I use earthquake source parameters to constrain deformation processes in volcanoes and rift zones.|
|Geoffrey A. Abers||Lamont Research Professor||Earthquake seismology, imaging and tectonics of active plate boundaries|
|Won-Young Kim||Lamont Research Professor||Earthquakes in stable continental regions, regional seismic wave propagation, monitoring underground nuclear explosions, observational seismology|
|Lynn R. Sykes||Higgins Professor Emeritus||Earthquake Studies, Control of Nuclear Weapons, Tectonics, Natural Hazards.|
|Michael S. Steckler||Lamont Research Professor||Tectonics of Sedimentary Basins, Isostasy, Stratigraphic Modeling, Marine Geophysics|
October 07, 2014Gordon Jacoby Jr., a Columbia University researcher who hiked, flew, dove and paddled into some of the wildest corners on earth in search of trees that could reveal the planet’s workings, died on Oct. 1 at a hospital near his home in Raphine, Va. He was 80.
November 07, 2013
Most earthquakes erupt suddenly from faults near Earth’s surface, and the big ones can topple cities. But miles below, rocks heated to the consistency of wax moving over thousands to millions of years may be the driving force behind some of these events.
July 11, 2013
Large earthquakes from distant parts of the globe are setting off tremors around waste-fluid injection wells in the central United States, says a new study. Furthermore, such triggering of minor quakes by distant events could be precursors to larger events at sites where pressure from waste injection has pushed faults close to failure, say researchers.
July 09, 2013
A new study in the journal Nature provides fresh insight into deep-earth processes driving apart huge sections of the earth’s crust. The process, called 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. (See the slideshow below.) Here, earthquakes and volcanoes have rent the surface over some 30 million years, forming part of Africa’s Great Rift Valley. What causes this, and does it resemble the processes on the seafloor, as many geologists think?
December 11, 2012
Scientists from Columbia University’s Earth Institute will present important new studies at the Dec. 3-7 meeting of the American Geophysical Union, the world’s largest gathering of earth and space scientists. Below: a chronological guide. Most researchers are at our Lamont-Doherty Earth Observatory (LDEO).More info: http://fallmeeting.agu.org/2012/ Reporters may contact scientists directly at any time, or call press officers:
November 27, 2012
January 06, 2012
Earthquakes that have shaken an area just outside Youngstown, Ohio in the last nine months—including a substantial one on New Year’s Eve—are likely linked to a disposal well for injecting wastewater used in the hydraulic fracturing process, say seismologists at Columbia University’s Lamont-Doherty Earth Observatory who were called in to study the quakes.
July 21, 2011
For all of its violent destruction, the earthquake that struck Haiti on Jan. 12, 2010, hardly scratched the surface of the island. But scientists now say they have found some of the best clues to understanding the quake under water.
July 13, 2011
After the recent great quakes that have swept away entire coastlines and cities in Japan, Haiti and Sumatra, scientists are now looking hard at the nation that may suffer the gravest threat of all: Bangladesh. A new documentary from the Earth Institute follows seismologists as they trace signs of deeply buried active faults, past movements of the earth, and sudden, catastrophic river-course changes.
June 08, 2011
Starting today, armchair explorers will be able to view parts of the deep ocean floors in far greater detail than ever before, thanks to a new synthesis of seafloor topography released through Google Earth. Developed by oceanographers at Columbia University’s Lamont-Doherty Earth Observatory from scientific data collected on research cruises, the new feature tightens resolution in covered areas from the former 1-kilometer grids to just 100 meters.
April 28, 2011
March 30, 2011
The largest recorded earthquake in Japan's history has triggered a series of events that have killed thousands, crushed and submerged cities, and left a financial toll from which it will take years for an already struggling economy to recover.
October 27, 2010
Each year, dozens of small, mostly harmless earthquakes quakes rattle the northeastern United States and southern Canada, and one quite active area runs along the shores of lakes Erie and Ontario, in western New York. In order to learn more about what generates these, and the possible threat of something bigger, scientists at Columbia University’s Lamont-Doherty Earth Observatory have installed a new seismometer at the West Valley Central School, southeast of Buffalo.
June 23, 2010
An earthquake with the following parameters has occurred:
Time: Wednesday, June 23, 2010 at 17:41:42 UTC, 13:41:42 EDT (1:42 PM in NY)
Location: 45.862 °N, 75.457 °W (Southern Ontario), approximately 53 KM (33 mi) NNE from Ottawa
Depth: 18 km (11.2 mi) set by location program
June 18, 2010
In nature, random signals often fall mysteriously in step. Fireflies flashing sporadically in early evening soon flash together, and the same harmonic behavior can be seen in chirping crickets, firing neurons, swinging clock pendulums and now, it turns out, rupturing earthquake faults.
February 22, 2010
This week U.S. and Haitian scientists will start a 20-day research cruise off Haiti to address urgent questions about the workings of the great Jan. 12 earthquake, and the possibility of continuing threats. They hope to gather sonar images, sediments and other evidence from the seafloor that might reveal hidden structures...
January 22, 2010
The earthquake that struck Haiti took place along what is called a strike-slip fault—a place where tectonic plates on each side of a fault line are moving horizontally in opposite directions, like hands rubbing together. When these plates lock together, stress builds; eventually they slip; and this produces shaking.
September 23, 2009
That rumbling you feel is not necessarily a passing subway. New York City and the surrounding region gets a surprising number of small earthquakes, and a 2008 study from the region’s network of seismographs, run by Lamont-Doherty Earth Observatory, suggests that the risk of a damaging one is not negligible. This week, the federal government announced a major upgrade to that network.
August 25, 2008
Indian Point Nuclear Power Plant Seen As Particular Risk
A study by a group of prominent seismologists suggests that a pattern of subtle but active faults makes the risk of earthquakes to the New York City area much greater than formerly believed.
December 11, 2007
Dec 10, 2007--Scientists from Columbia University’s Lamont-Doherty Earth Observatory will report this week on vital topics including new evidence of the effects of climate change; technologies to confront it; studies of eastern U.S. earthquake risk; and previously unseen inner workings of the deep polar ice caps. The reports will be presented at the fall 2007 American Geophysical Union (AGU), the largest earth-sciences gathering in the world, Dec. 10-14 in San Francisco.
March 23, 2006
Seismologists at Columbia University and Harvard University have found a new indicator that the Earth is warming: "glacial earthquakes" caused when the rivers of ice lurch unexpectedly and produce temblors as strong as magnitude 5.1 on the moment-magnitude scale, which is similar to the Richter scale. Glacial earthquakes in Greenland, the researchers found, are most common in July and August, and have more than doubled in number since 2002.
July 20, 2005
When the sea floor off the coast of Sumatra split on the morning of December 26, 2004, it took days to measure the full extent of the rupture. Recently, researchers at Columbia University's Lamont-Doherty Earth Observatory analyzed recordings of the underwater sound produced by the magnitude 9.3 earthquake.
January 05, 2005
The Maurice Ewing, owned by the National Science Foundation and operated by the Lamont-Doherty Earth Observatory (L-DEO), is the only research vessel devoted to obtaining images of the deep earth for fundamental earth science research.
March 12, 2004
Finding the epicenter of earthquakes has not changed in principle since the 1930s -- after closely examining seismograms from different widely-spaced listening stations, researchers decide on the arrival times of various seismic waves and calculate an approximation. In practice this can result in errors of several miles
Lamont Doherty Researcher Develops New Use For Seismic Reflection Data: Revealing Locations And Potentials For Mega EarthquakesAugust 08, 2003
Researchers have found an important new application for seismic reflection data, commonly used to image geological structures and explore for oil and gas. Recently published in the journal Nature, new use of reflection data may prove crucial to understanding the potential for mega earthquakes.
May 02, 2003
Detailed analysis of regional and teleseismic waveform data from the June 18, 2002, Evansville, Indiana earthquake indicates that the earthquake occurred at a depth of about 18 km (±2 km).