Posted on 08/09/2018 10:55:39 AM PDT by ETL
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.
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 a large-magnitude (6.5 or greater) earthquake suspected of inducing other quakes, and accompanying each case was a control group of 5,355 three-day periods that didn’t have the quake injection.
“The test cases showed a clearly detectable increase over background rates,” Dr. O’Malley said.
“Earthquakes are part of a cycle of tectonic stress buildup and release. As fault zones near the end of this seismic cycle, tipping points may be reached and triggering can occur.”
The higher the magnitude, the more likely a quake is to trigger another quake.
Higher-magnitude quakes, which have been happening with more frequency in recent years, also seem to be triggered more often than lower-magnitude ones.
A tremblor is most likely to induce another quake within 30 degrees of the original quake’s antipode — the point directly opposite it on the other side of the globe.
“The understanding of the mechanics of how one earthquake could initiate another while being widely separated in distance and time is still largely speculative,” Dr. O’Malley said.
“But irrespective of the specific mechanics involved, evidence shows that triggering does take place, followed by a period of quiescence and recharge.”
(Excerpt) Read more at sci-news.com ...
The DUTCHSINSE LIVESTREAM is no longer on YouTube. He must be posting the recording of his programs.
The whole US is opposite the Indian ocean.
So, when somebody at the Watashaw Wednesday Night Sewing Circle dropped a pin back just before Christmas 2004, that triggered the earthquake and resulting tsunami a few days later? /"X Minus One", The Snowball Effect
nuthin new- we knew this 50 years ago in govt labs as the earth nodes theory
Bingo Norski. I look in on him when I can and I have great respect for his work.
The 1994 Northridge earthquake was a rolling one then a jackhammer one.
Earthquakes are like a ringing a bell....
Go go
Go Earth go go
Go Earth go go
Go Earth go go
Go Earth go go
Go Earth B. Goode
https://www.youtube.com/watch?v=Jql4GF2LKaU
Looked like it was closer to the shores of Antarctica.
Thanks ETL. That's interesting, because the claims have been made before, every few years since the late 1980s, and have always fallen part, because they don't have validity. Volcanic eruptions occur all the time, no mass extinctions. When mass extiinction was finally recognized as an essentially instantaneous event, volcanologists (starting with Dewey McLean) tried to deal themselves back in. A few years ago some were claiming that the thousands of impact craters in Mars were, unlike those on the Moon (which were shown to be of impact origin thanks to the Apollo missions etc) caused by volcanism.
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