In a first-of-its-kind study, seismologists have used tiny "microearthquakes" along a section of Californias notorious San Andreas Fault to create unique images of the contorted geology scientists will face as they continue drilling deeper into the fault zone to construct a major earthquake "observatory."
A chain of 32 seismometers recorded the small earthquakes at underground locations along a 7,100-foot-deep vertical drill hole. This eight-inch-diameter pilot hole was excavated last year about 1.1 miles southwest of the San Andreas Fault to monitor earthquake activity and assess the areas underground environment before drilling the main hole. After more vertical drilling at the same location next summer, the main hole will be angled off towards the northeast to pierce the fault zone itself.
In a paper in the Friday, Dec. 5, 2003 issue of the research journal Science, researchers from Duke University and the United States Geological Survey (USGS) described how they used seismic signals and computer analysis to derive outlines of what may be secondary faults, and perhaps fluid filled cracks, in subterranean locations between the main fault and the pilot hole.
Monte Basgall | EurekAlert!
Predicting unpredictability: Information theory offers new way to read ice cores
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Physicists of the University of Würzburg have made an astonishing discovery in a specific type of topological insulators. The effect is due to the structure of the materials used. The researchers have now published their work in the journal Science.
Topological insulators are currently the hot topic in physics according to the newspaper Neue Zürcher Zeitung. Only a few weeks ago, their importance was...
In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...
Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
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