what causes aftershocks?

"This might be of some comfort to residents near the epicenter of the The new results will help investigators in both understanding earthquakes in continents and trying to assess earthquake hazards there.

You're just in for hundreds of years of aftershocks, since the fault moves more than 100 times slower than the San Andreas.

This limits the earthquake size, because there is not much left to rupture, he said.Van der Elst said larger aftershocks start at the edge of the earthquake tear, where the quakes can break new ground on unbroken "A really big earthquake ruptures a fresh patch of the fault," Van der Elst told Live Science.

Some aftershock sequences, however, may last centuries, such as the sequence resulting from the In general, aftershocks are most severe and happen more frequently in the hours and days that follow an earthquake. Check out Britannica's new site for parents!

"While the results make intuitive sense, demonstrating that nature follows these statistical patterns is the first step toward including aftershock location in official forecasts. NY 10036. If that’s what floats your boat. Aftershocks occur near the fault zone where the mainshock rupture occurred and are part of the "readjustment process” after the main slip on the fault.

Aftershocks are earthquakes that follow the largest shock of an earthquake sequence.

He found that smaller aftershocks tend to strike within the main earthquake rupture, on sticky bits of the fault that did not break during the original earthquake. The pattern of aftershocks helps confirm the size of area that slipped during the main shock. "Predicting big quakes based on small quakes is like the 'Whack-a-mole' game -- you wait for the mole to come up where it went down," Stein said.

A confirmed adorer of the good science of rock-breaking, Dana Hunter explores geology with an emphasis on volcanic processes, geology news, and the intersection of science and society. This is to be expected if the fault rupture producing a major earthquake does not relieve all the accumulated… Let's have a look at New Madrid, shall we? Anything we can do to increase the chances of successful earthquake prediction could help save a lot of lives. Overall, this decay is inversely proportional to the amount of time passing since the principal earthquake. Please refresh the page and try again.Live Science is part of Future US Inc, an international media group and leading digital publisher. Go ahead. The name is derived from the aftershocks which follow an earthquake. "But we now know the big earthquakes can pop up somewhere else. Typically, aftershocks are found up to a distance equal to the rupture length away from the fault plane. This causes a change in the regional stress, the size of which decreases rapidly with distance from the mainshock.

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