fan shooting

fan shooting . Seismic shooting in which detectors are laid out along an arc so that each detector is in a different direction at roughly the same distance from a single source point. It was used in the 1920s and 1930s to detect the presence of shallow salt domes intruding low-velocity sediments. Syn: arc shooting.

Popular Week of September 14, 2018

Photo Release: BUFFALO charges towards the earliest galaxies

The NASA/ESA Hubble Space Telescope has started a new mission to shed light on the evolution of the earliest galaxies in the Universe. The BUFFALO survey will observe six massive galaxy clusters and their surroundings. The first observations show the galaxy cluster Abell 370 and a host of magnified, gravitationally lensed galaxies around it.

Partisan (?) science continued.

“It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood; who strives valiantly; who errs, who comes short again and again, because there is no effort without error and shortcoming; but who does actually strive to do the deeds; who knows great enthusiasms, the great devotions; who spends himself in a worthy cause; who at the best knows in the end the triumph of high achievement, and who at the worst, if he fails, at least fails while daring greatly, so that his place shall never be with those cold and timid souls who neither know victory nor defeat.” – Theodore Roosevelt[1]

New measurement shakes up earthquake estimates

As tectonic plates collide and sink in subduction zones, huge megathrust earthquakes can produce devastation above. Yet, there are many unknown factors that control how much energy is released in each earthquake. Now, a team of scientists has come up with a new model to help crack the complexity and nature of megathrust earthquakes using global historical records.
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incretion (in-cre'-tion). (a) A term proposed by Todd (1903) for a cylindrical concretion with a hollow core; e.g. a rhizocretion. (b) A concretion whose growth has been directed inward from without.


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