Sentences with phrase «quakes from the faults»

Never more evident is the usefulness of our particular congregation than when a community quakes from the faults of ancient ethnic tectonic plates pushing just below the surface of our culture.

Not exact matches

To do that, scientists needed to identify reliable signals that a fault was about to fail: a distinctive flurry of small quakes, a whiff of radon gas oozing from the ground, some oddly perturbed wildlife.

But while the Ecuador quake resulted from a slip between the South American and Nazca plates, the two Japan quakes were triggered by a fault within a single plate, according to the US Geological Survey.

A surprisingly big quake arrives where smaller ones were expected, as in Japan; an unseen fault breaks far from obviously dangerous faults, as in New Zealand.

The New Madrid fault in Missouri, for instance, may be experiencing aftershocks from a quake in the early 1800s (Nature, DOI: 10.1038 / nature08502).

While most scientists agree that the surge has been triggered by the injection of wastewater from oil and gas production into deep wells, some have suggested these quakes are natural, arising from faults in the crust that move on their own every so often.

So far they have mapped the natural geologic stresses throughout Oklahoma and Texas — the states with the largest populations at risk from human - induced quakes — and have discovered that only a fraction of faults hold the potential to slip in the presence of moderate pressure increases.

«Other recent surface - rupturing earthquakes, such as the 1999 Hector Mine quake in southern California, have opened our eyes to the potential for earthquake rupture to cascade from one fault to another,» he says — hence the concern about the «end - to - end» positions of the Panama faults.

By cutting vertical trenches into the ground along the faults, Rockwell and his colleagues were able to see signs of previous quakes from the exposed cross-sections of earth and rock.

America's midsection has experienced an uptick in quakes due to part of the hydraulic fracturing process: Wastewater from the fossil fuel extraction is pumped deep into the ground, causing faults to separate and slip.

Modeling rupture connectivity doesn't just apply to California's complicated network of faults — it can also have implications for the hazard assessed from induced quakes, she says.

But they note that their calculations place the major slip area in the Lushan quake about 40 to 50 kilometers apart from the southwest end of the Wenchuan quake fault.

So researchers are anxious to find out whether the stress transferred southward from the 9 has accelerated slow slip on the fault and thus defused the threat of a quake.

In 2008, researchers examining data from the San Andreas Fault Observatory at Depth reported detectable changes in the way seismic waves traveled through fault rock in the hours before two quakes.

Researchers gained new insight into how earthquakes can interact from a magnitude 7.9 quake along Alaska's Denali Fault in November 2002 that involved a chain reaction of fault shaking.

Super-shear quakes may create more violent tremors farther from the fault line than shear quakes do.

For example, aftershock sequences for quakes that occur at faults far from a tectonic plate boundary — such as the New Madrid Seismic Zone — often last much longer than those triggered by quakes near plate boundaries, says Seth Stein, a geophysicist at Northwestern University in Evanston, Illinois.

Though this fault line does not extend into Georgia, aftershocks from quakes on this fault line could potentially damage homes here.