Thursday, March 24, 2011
Solar Activity vs Earthquakes
I’ve use a 4 point smoothing to make the data more legible (which is why some Mag 8 earthquakes don’t appear). Data for earthquakes is from here, and sunspot data is from here.
As you can immediately see, earthquake number and intensity is basically random. There is no correlation with sunspot number, which is a proxy for solar activity and flare numbers. You can play around with the raw data and plot it in a variety of ways (binning earthquakes by month etc.) but the answer is the same. No relationship.
To get a better handle on this, I’ve also plotted all earthquakes for 2010 magnitude 5 and greater against all solar flares magnitude C1 and greater (C is weakest, M more intense and X very intense). Flare data is from the Australian IPS. Coronal mass ejections (when Earth directed) tend to hit 48 hours after the solar flare (click image to embiggen).
Again, as you can see there is no correlation between solar flares and earthquake number or magnitude.
I think the way the Sun triggers earthquakes is through the spacequake.http://science.nasa.gov/science-news/science-at-nasa/2010/27jul_spacequakes/
Accordingly, it will be necessary to correlate CME's which actually strike Earth to earthquakes. It might be good to start with CME's arising from X-class flares and Earthquakes 7.0 and greater.
It is of course "apparently no corrollaton" .
It is still possible for them to be
directly linked but due to our limited perception,rendered invisible.
All things are connected.
How about time shifting them in relation to one another, earthquakes following, solar.
Perhaps eathquakes are the precursors of solar flares.
Besides, your "study" is at best useless, because you cannot link those 2 data sets (one with an average solar activity, and another with factual and precise seismic data).
Last and not least, you can STILL notice something on your graph, just look for each time your solar activity is low, you have the highest earthquake.
I understand your are sceptical, but this is just not reassuring for anyone.
There are fewer of those than actual flares of course, but extracting CME impact data is more difficult. What CME database do you use?
But it still dosen't help, the Feb 7-13 Flare complex hurled CME after CME at Earth, with some very nice auroa, but earthquakes, as you can see for yourself, not so much (ie nothing happened).
Besides, your "study" is at best useless, because you cannot link those 2 data sets yes, yes you can, they are both smoothed in the same way, so the averaging process is identical. In the thread that spawned this post it was baldly stated
Anyone who thinks that solar cycles, solar flares, sun spots, and CMEs have no correlation to earthquakes clearly understands neither.
Anyone can go to USGS, dump the earthquake history database to a csv file, make a graph out of it in Excel, and compare it to solar cycles. The is a very clear and obvious correlation between the two.
So, no clear correlation between solar cycles, sunspot and flares and earthquakes, as was claimed (CME s are harder, because the record is much sparser, but more obvious correlations between the few CME events I have records of)
And if you actually look carefully at the data, earthquakes are no more common in quite times (with very few CME's which is the exact OPPOSITE of the correlation people claim). Look at the first solar minimum for example, or the down and up swings of the solar cycle.
You are of course welcome to make and present your own, more detailed graph.
I've asked on the comets list, but no-one has replied.
M R Spacey