Major earthquakes can trigger faraway ‘slow-slip’ events

November 28, 2012GEOLOGY Major earthquakes might set off incredibly slow earthquakes thousands of miles away, new research suggests. These findings, detailed online Sept. 11 in the Journal of Geophysical Research-Solid Earth, shed light on how earthquake zones might communicate with each other over large distances, scientists added. The cluster of devastating earthquakes that rocked the globe during the past decade from Japan to Sumatra to Haiti is one reason why scientists are investigating whether temblors in different parts of the world are linked to one another. Although research to date suggests that major quakes aren’t likely to trigger other massive quakes around the globe, they can set off tremors worldwide. Now researchers find that large quakes might also trigger mysterious slow earthquakes thousands of miles away. One kind of slow earthquake known as a slow-slip event can last for weeks, shifting the Earth as much as an ordinary earthquake of magnitude of 7 would in mere moments. The investigators focused on the magnitude 8.8 Maule earthquake that struck Chile in 2010. They found it generated surface waves that, within hours, set off tremors in the Guerrero region of southwestern Mexico 4,140 miles (6,660 kilometers) away. Data from GPS stations also revealed the earth there began moving southward at the same time tremors there began. The tremors and movements of the GPS stations lasted for about six months after the 2010 Chile quake. “Such an observation may indicate that the Maule earthquake triggered a slow-slip event in Guerrero,” said researcher Dimitri Zigone, a seismologist at the University of Southern California in Los Angeles. Near Guerrero lies a subduction zone, where a tectonic plate under the Pacific Ocean is diving under the continental North American plate. The seismic energy from Chile apparently increased the stress in the segment of the subduction zone near Guerrero, which may explain the resulting slow-slip event. “The fact large quakes can have effects so far away could be important because it may change the recurrence time between earthquakes in a specific location,” Zigone told OurAmazingPlanet. “Usually we assume that the seismic cycle — the recurrence between earthquakes — is regional, on a single fault system or at a plate boundary, for example. If these large-scale interactions exist, it may indicate that even at large distances, a mega-earthquake can modify the conditions in another region.”  –MSNBC
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4 Responses to Major earthquakes can trigger faraway ‘slow-slip’ events

  1. Tina Marie says:

    I’m certainly no scientist but this seems kind of like a no brainer to me. The continents are all connected be it above land or under the ocean so it seems logical that Earthquakes that happen in one part of the world, especially large ones, would transfer energy so to speak all over the planet. Everything is interlocked and it puzzles me as to why this seems to be such mystery to solve. I think they need to spend less time and resources investigating the obvious and use it to prepare for the massive disasters to come and how to deal with the aftermaths of those.


    • MaShiach ben Yosef says:

      unfortunately they will not be able to deal with the coming disasters that will be unleashed on planet earth over the coming 12 months. They will get worse with each passing month as they have done since 2009-2010.


  2. sheba says:

    There was an earthquake in Quebec Canada Nov 27 . 4.2 Seems to be more frequent now


  3. Irene C says:

    Earthquakes communicating with each other. I understand what they’re saying, but that statement just tickled my funny bone. I do believe that earthquakes in one place will trigger tremors in other places. Although they say that they won’t trigger massive quakes, who’s to say that a tremor couldn’t cause a fault to totally slip.

    Alvin – did you see the tornado that hit Italy? I saw the video and it rivals any footage from tornado alley I’ve seen. There have been nine reported tornadoes in Italy this year.


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