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originally posted by: Phage
Is there any comparison to precursor activity in 2011?
Is this part of the same fault system?
originally posted by: TrueAmerican
BUT- there are A LOT of aftershocks. A little too many for a 6.3 if you ask me. Is why I am a bit concerned.
Approximately 1,500 earthquakes are recorded in Japan every year. The magnitude of each earthquake varies, and larger earthquakes between 4 and 7 on the Richter scale regularly occur
We list the year’s 14 apogees and 13 perigees beneath the illustration below. This year’s farthest apogee happens on October 31, 2016 (406,662 kilometers or 252,688 miles), and the closest perigee comes on November 14, 2016 (356,509 kilometers or 221,524 miles). That’s a difference of over 50,000 kilometers or 30,000 miles. The variation in the moon’s apparent size in our sky is akin to that of a US quarter versus a US nickel.
But twice a month, during a full or new moon, tides are especially high because the moon, earth and sun all line up together. (These twice-monthly tides are known as "spring" tides.)
Big quakes can occur when this additional weight of tidal water strains geological faults, according to the study
his research team determined that nine of the 12 biggest quakes on record happened near or on days with full or new moons.