Powerful Earthquakes Can Trigger Other Ones on Opposite Side of Earth, New Research Shows

loranseen (Posted by) Level 3
Click For Photo: http://cdn.sci-news.com/images/2018/08/image_6288f-Earthquakes.jpg

Click For Photo: http://cdn.sci-news.com/images/2018/08/image_6288-Earthquakes.jpg

A big earthquake can not only cause other quakes, but large ones, and on the opposite side of our planet, according to new research from Oregon State University.

O’Malley et al find quakes can systematically trigger other ones on opposite side of the globe. This image shows a high school running track in Taiwan crossed by the Chelungpu fault in an earthquake in September 1999. Image credit: Bob Yeats, Oregon State University.

Dr - Robert - O'Malley - Department - Botany

Dr. Robert O’Malley from the Department of Botany of Plant Pathology at Oregon State University and co-authors looked at 44 years of seismic data and found clear evidence that tremblors of magnitude 6.5 or larger trigger other quakes of magnitude 5.0 or larger.

It had been thought that aftershocks — smaller magnitude quakes that occur in the same region as the initial quake as the surrounding crust adjusts after the fault perturbation — were the only seismic activity an earthquake could lead to.

Team - Analysis - Data - Evidence - Days

But the team’s analysis of seismic data from 1973 through 2016 provided the first discernible evidence that in the three days following one large quake, other earthquakes were more likely to occur.

Each test case in the study represented a single three-day window ‘injected’ with...
(Excerpt) Read more at: Breaking Science News | Sci-News.com
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