And the Kermadecs have gazillions of quakes...
Grumpy Old Bastard
And the Kermadecs have gazillions of quakes...
. “No pleasure is worth giving up for two more years in a rest home.” Kingsley Amis
Hardcore Biker
Didn't know BD had been to Geordie land thoughOriginally Posted by slofox
Born to be mild
About one magnitude 7+ every three to five years.
Grow older but never grow up
Forum whore
More seismographs have meant in increase in the detection of smaller quakes but if we look at larger quakes the frequency has been increasing. It's not reporting "improvements" either, as that has nothing to do with the data collected, only with the data disseminated.
Trends since 1986
For example, between 1986 and 1996 (incl), a period of 11 years, there were "just" 15 earthquakes listed by USGS of magnitude 7.0 or greater. This is not markedly different (albeit a slight decrease) from previous (similar periods) of 20th century, where an average of about 18 might be expected.
But between 1997 and 2007 (incl), a period of only 11 years, there were 99 earthquakes with magnitude 7.0 or greater : This is more than a six-fold increase on the previous similar period - and is a stark increase on any earlier decades in 20th century too.
The trends in nature here, particularly from 1997 support the wider realisation of prophesy about the "End Times", namely that an increase in earthquake activity is a pre-requisite for the "second coming of Jesus Christ" foretold in the bible. It does not indicate how close we are to this event, but suggests it is not too far away.
Future Trends
Past performance cannot necessarily be taken as a clear indication of future trends (unfortunately many scientists tend to assume too often that it is, by simply projecting forward on an existing trend, without considering other factors) so we must be careful how past events are interpreted. However, it is clear we are currently living in a time when earthquake frequency has increased, it will be interesting to see if the immediate future maintains this trend.
Other Notes
When there are multiple earthquakes (over 7.0) occuring within 5 days of each other in the same geographic area, only one has been counted. This may result in slightly different (lower) numbers for earthquakes than might otherwise be listed, although consistancy in this approach makes historical comparisons more reliable, as large after-shocks were not always recorded (in addition to the "main" quake) in previous decades.
incl = inclusive dates.
References
The number and energy intensity of earthquakes in any given period are based upon records from USGS and other sources, including those recorded at http://earthquake.usgs.gov/
Earthquake details used here may also be available at http://en.wikipedia.org/wiki/List_of_earthquakes
Graph plot for "all magnitude" earthquakes reproduced from DL Research paper http://www.dlindquist.com/
http://earthquake.usgs.gov/earthquak...ar/eqstats.php
You don't get to be an old dog without learning a few tricks.
Shorai Powersports batteries are very trick!
Forum whore
Here's the actual records, takes a bit of wading through though...
You don't get to be an old dog without learning a few tricks.
Shorai Powersports batteries are very trick!
One hell of a ride.
Pure BeltaDidn't know BD had been to Geordie land though
Best Frenemy you could have!
I was going to make some smart arse comment about leaving you lot to enjoy hell why I enjoyed the USA...
except I'm going up the western coast... so I'm still fucked
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