Tiny changes in Earth’s gravitational field could help predict tsunami’s size

For several years now, the APC Virgo Group has been involved in studying the possible synergies between geophysics and terrestrial gravitational wave detectors. Geophysical phenomena cause disturbances of “Newtonian” gravity. If these are not gravitational waves, common interests, especially on measurement techniques, bring the two communities closer together. The studies published in Nature Communications in 2016 (Montagner et al.) And […]

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Straight to the source: the LIGO-Virgo global network of interferometers opens a new era for gravitational wave science

  A fourth gravitational-wave signal coming from the merger of two stellar mass black holes located about 1.8 billion light-years away was detected on the 14th of August 2017, at 10:30:43 UTC. GW170814 is the first event observed by the global 3-detector network, including not only the two twin Advanced LIGO detectors but the Advanced Virgo detector as well. Following […]

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Einstein, Black Holes and Gravitational Waves – Public conference by Dr Barry Barish

Barry Clark Barish, emeritus professor at the California Institute of Technology (Caltech), became Principal Investigator of the Gravitational Wave Observatory by Laser Interferometry (LIGO) in 1994 and its director from 1997 for several years. He led the effort to approve funding for LIGO by NSF in 1994, the construction and commissioning of LIGO interferometers in Livingston, LA and Hanford, WA […]

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GW170104: Observation of a 50-Solar-Mass Binary Black Hole Coalescence at Redshift 0.2

The Advanced LIGO-Virgo collaboration would like to announce the third detection of gravitational waves, confirming the beginning of a new field of astronomy.  As with the first two detections, the gravitational waves detected on January 4th, 2017, were emitted by the coalescence of two black holes, with masses of 30 and 20 solar masses respectively, at a distance of three […]

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The night of gravitationnal wawes

On March 20, 2017, the CNRS and the Société Française de Physique organize “The night of gravitationnal wawes” in fifteen cities in France and Italy, an event supported by Labex UnivEarthS. With scientific conferences, virtual tours of laboratories, a quiz and a projection of excerpts of commented films, this event open to all celebrates the discovery of gravitational waves announced […]

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