|Quoting Silver1SWA (Reply 6):|
Does Japan use a different scale? I noticed 7 pointers seems rather routine and are shaken off as no big deal (pun intended). A magnitude 7 here in California is a big deal.
In the news, there are usually 3 numbers reported:
The Shindo, which is a localized number that measures the intensity of the shaking in that particular area (this thread's quake registered as a 4 out of 7 in Fukushima, and a 3 in Tokyo, whereas the 3/11 quake registered a 7 in Sendai, 6+ in Fukushima, and a 5+ in Tokyo.)
The intensities are 0 (unnoticeable,) 1, 2, (noticeable in a tall building), 3(fairly noticeable) 4 (pretty damn noticeable) 5- (check your kitchen plates) 5+ (pick up your kitchen plates and reset your chairs) 6- (you may wanna head outside), 6+ (You're probably outside screaming) and 7 (if your building didn't collapse you're hyperventilating in a state of shock.)
Then we have the JMA moment magnitude scale, which is sometimes a different number from the USGS scale. On TV
usually the Shindo and JMA are broadcast, and in papers and online sources all 3 numbers are broadcast.