Really cool "green lightning" effect observed before and during the earthquake: <a href="https://mobile.twitter.com/AlanEchelon96/status/906031454529785856" rel="nofollow">https://mobile.twitter.com/AlanEchelon96/status/906031454529...</a> I believe this phenomenon is still not understood...
Many people here in Turkey will think solar eclipse triggered this. Strong 1999 earthquake in Turkey also happened just some weeks after the full solar eclipse. I think it is just a coincidence though.<p>Edit: wording.
I felt this earthquake in Austin, which is over 1000 miles away. Many others felt it as well: <a href="https://mobile.twitter.com/search?q=Austin+earthquake&src=typed_query" rel="nofollow">https://mobile.twitter.com/search?q=Austin+earthquake&src=ty...</a>
How do they appropriately measure earthquakes so deep?
It had a magnitude of 8.1 on the surface level, however it happened at a depth of 32000 meters! so was it a magnitude 9 earthquake down there, or does the 8.4 already take into account the depth?
Live updates<p><a href="http://www.telegraph.co.uk/news/2017/09/08/mexico-earthquake-magnitude-8-tremor-rattles-buildings-capital/" rel="nofollow">http://www.telegraph.co.uk/news/2017/09/08/mexico-earthquake...</a>
One side if the tectonic plate at Japan and indonesia have had movement, now the otherside at mexico, so North Western America must be under more and more strain.
As for a root cause, could it be related to North Korea's recent nuclear test?<p><a href="http://www.express.co.uk/news/world/849381/tremor-North-Korea-nuclear-test" rel="nofollow">http://www.express.co.uk/news/world/849381/tremor-North-Kore...</a>