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Related: About this forumMoon’s Gravity Linked to Big Earthquakes
Moons Gravity Linked to Big Earthquakes
The geologic strain of tides during full and new moons may increase magnitude
By Alexandra Witze, Nature magazine on September 13, 2016
Big earthquakes, such as the ones that devastated Chile in 2010 and Japan in 2011, are more likely to occur during full and new moonsthe two times each month when tidal stresses are highest.
Earths tides, which are caused by a gravitational tug-of-war involving the Moon and the Sun, put extra strain on geological faults. Seismologists have tried for decades to understand whether that stress could trigger quakes. They generally agree that the oceans twice-daily high tides can affect tiny, slow-motion tremors in certain places, including Californias San Andreas fault and the Cascadia region of the North American west coast.
But a new study, published on September 12 in Nature Geoscience, looks at much larger patterns involving the twice-monthly tides that occur during full and new moons. It finds that the fraction of high magnitude earthquakes goes up globally as tidal stresses rise.
Satoshi Ide, a seismologist at the University of Tokyo, and his colleagues investigated three separate earthquake records covering Japan, California and the entire globe. For the 15 days leading up to each quake, the scientists assigned a number representing the relative tidal stress on that day, with 15 representing the highest. They found that large quakes such as those that hit Chile and Tohoku-Oki occurred near the time of maximum tidal strainor during new and full moons when the Sun, Moon and Earth align.
More:
http://www.scientificamerican.com/article/moon-s-gravity-linked-to-big-earthquakes/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+energy-and-sustainability+%28Topic%3A+Energy+%26+Sustainability%29
Renew Deal
(81,869 posts)ret5hd
(20,508 posts)and wipe that smirk from its face once and for all!
C_U_L8R
(45,014 posts)maybe he'll find his taxes when he's there
cstanleytech
(26,308 posts)investigation of their own prior investigation of the investigation into the first investigation of the original investigations investigation.
Hayduke Bomgarte
(1,965 posts)Can build a wall around it... Make the Man in the Moon pay for it.
PJMcK
(22,040 posts)Judi Lynn, thank you for all of the fantastic articles for which you continuously provide links and summaries. I'm very grateful for the time and effort you must go to to provide us with all this great information.
I'm going to attend a lecture next week in NYC by one of the scientists from the LIGO project which detected gravitational waves. That should be an interesting evening.
Judi Lynn
(160,592 posts)Wounded Bear
(58,685 posts)the same gravitational force that lifts the oceans is bound to have some affect on the crust, too.