Click to view attachment So,it's true now.The hugest,like,forever.
When the discovery of the Pawnee fault happened,it was the noise and movement that signalled it's presence on Saturday.
A quiet fault will remain undiscovered for that reason,as the most prevalent sensing tools we have is the seismometer and tellurometer.
The big one at New Madrid has no data from such devices,as they had not yet been in use,in 1812.Other than written descriptions,
and direct measurements of the displacements,it is a tall job to determine the scale of the tremblor,204 years ago.
316 years ago,January 26,1700,at 9pm,the huge displacement of Cascadia sent a monster tsunami toward Japan.
The scale of that one is nearly off the charts,~M9,the evidence now clear,something massive did happen,as the Huu-ay-aht people said.
Will again,for sure,the when of it is the tough part,we need more and better means of measuring the stress in the ground.
GP-Radar,acoustic echo location,vibration amplitude imaging,all of these techniques show promise,and generate more data.
http://news.nationalpost.com/news/canada/v...kes-experts-sayhttps://www.google.ca/search?q=loma+prieta+...q4WFWzGjr0-M%3Ahttps://ww2.kqed.org/news/2014/10/17/loma-p...at-still-haunt/http://throughthesandglass.typepad.com/thr...earthquake.htmlhttp://geo-mexico.com/?p=4543There's more,the records of the calamities that have been inadvertently forgotten,is a key part of data samples.
Without those records,a skewed proof is created.Below is a good example of that sort of fact exclusion,or,selective oopsy.
http://www.srh.noaa.gov/oun/?n=tornadodata-ok-f5tornadoeshttp://www.srh.noaa.gov/oun/?n=events-19470409http://www.tornadohistoryproject.com/tornado/Oklahoma/mapThat is the point of recording history,a complete set of facts,for future research.
Otherwise,the description more applicable is 'some small part of history',or 'incomplete history'.
The survivors of the big one,in 1700,told the story accurately to this day,more than three centuries later.
https://en.wikipedia.org/wiki/Huu-ay-aht_First_NationsEarth,more like Vulcan,the planet of the Four Dragons,or Thunderbirds.
/
Click to view attachment Baja M7.2 2010,Mexicali.
/