Quake Watch 2012

reply to post by who-me?


Excellent, already looking at their Earthquake Statistic of Thailand pdf, that will be handy for cross referencing historic quakes
sample
"On the waning moon day of the 7th 460, XII MM, Yonok, Yonok collapsed and turned to be a large natural reservoir caused a major earthquake"

Well, have any of you guys got any earthquake predictions yet that happened? I've been checking in occasionally to see if you're seeing any patterns emerging.

Having trouble with matching those off W Coast Sumatra quakes this morning with SNZO LISS graph.
Lists show 3 strong quakes, SNZO shows 9 "pulses"
I have downloaded the travel times to SNZO but none of the traces match up with any of the pulses
Had a look at some other graphs on LISS and they all just have the 3.
I wonder if the NZ seismo duplicated each pulse?
Never seen this happen before.
Luckily I snagged SNZO just before the Papua 6.6, so it stands alone, without the 6.6 obscuring it.


heres the travel times should open in your browser window, text file.
Any ideas?

Not sure if this Android App has ever been mentioned throughout this thread, but I thought there is no better thread that one can post a link to the ATS thread in.

For those Android users that are so inclined...

Earthquake Alert! customizeable Quake Alerting App for Android users (worldwide coverage)

reply to post by wasobservingquietly

Many many thanks

Unfortunately 64 is not 'many years from now' it is today.

And perfect timing with a 6.6 (earthquake) firecracker !!!

And on my actual birthday a Mag 7.1. In fact since my birthday there have been 10 years when a quake of >= 6.5 occurred and since the turn of 1900 there were 16 on the 21st.

Now I can add one more to the total!

reply to post by PuterMan


Quite appropriate to the festivities that your birthday has had such a quake upon it so consistently,

Many happy returns!

To stay on topic:

Oh, um , there was an earthquake,,,,somewhere in the world today, and there probably will be a few more...

reply to post by muzzy

Any ideas?

Yup, but since a picture speaks a thousand words I will try and show you what I think is happening there.

If as an example I create 2 sine waves, one at 440 Hz and the other at 500 Hz the two waveforms side by side look like this.



If the difference in the frequencies was only about 5 by the way you get a binaural tone so loved by some as a method of relaxation and adjusting your frequencies. (But which I think is a discordant pain in the ears, but then I am a musician at heart and hate instruments out of tune.)

Now, if you combine those two waveforms on the one track you get pulses.



That is very 'formalised' since it is fixed frequencies but I suspect that it is probably this effect that is causing the pulsing.

reply to post by who-me?


Thanks for the link. The english page seems to think it is SUNDAY 21st April!!!

The local listing is good, and even has ID numbers if you look at the page source, and I should be able to screen scrape that so I may add that to my collection sometime in the future. Must get Australia, Canada, UK and Iceland done first!!

Happy B-day PuterMan!

reply to post by JohnVidale

For example, 20 minutes after the Japanese M9 last year, there was a low-energy M8 that went several days before being noticed.

Sources for that John? I can't find it in the ANSS catalogue on line. The catalogue only has the Mag 9, or is M8 referring to the algorithm and not the magnitude? That makes a significant difference to the energy released for the year and thus affects my analysis of same if it was a magnitude 8.

Just testing the output from the latest version of QVSData which is nearing completion for the next release. Some of the delay has been occasioned by the change over in the USGS web site.

2 things. The current list to clipboard is still there but there is a forum list to clipboard which will be available in the next standard version which saves you having to remember ex tags and attribution. I am a great believer in letting the computer do the work for me and keeping my brain as clean and pristine as possible

Here is a sample of the output:

Prov,Date/Time UTC,Latitude,Longitude,Magnitude,Depth(Km),Location
emsc,2012-04-21 01:16:52, -1.608, 134.346, 6.6, 10.0, Nr. N Coast Of Papua Ind.
usgs,2012-04-21 01:16:52, -1.603, 134.274, 6.6, 16.0, Nr. N. Coast Of Papua. Ind.
emsc,2012-04-17 19:03:55, -59.133, -16.617, 6.2, 2.0, East Of South Sandwich Isls.
usgs,2012-04-17 19:03:55, -59.098, -16.692, 6.2, 1.0, East Of The South Sandwich Isls.
emsc,2012-04-17 07:13:50, -5.477, 147.120, 6.8, 211.0, Eastern New Guinea Reg. P.N.G.
usgs,2012-04-17 07:13:50, -5.474, 147.097, 6.8, 208.2, Eastern New Guinea Region. P.N.G
usgs,2012-04-17 03:50:16, -32.700, -71.483, 6.7, 37.0, Offshore Valparaiso. Chile
emsc,2012-04-17 03:50:15, -32.611, -71.486, 6.7, 30.0, Offshore Valparaiso Chile
emsc,2012-04-15 05:57:38, 2.625, 90.293, 6.2, 10.0, Off W Coast Of Northern Sumatra
usgs,2012-04-15 05:57:38, 2.549, 90.277, 6.2, 15.2, Off W. Coast Of Northern Sumatra
usgs,2012-04-14 22:05:26, -18.997, 168.771, 6.5, 8.7, Vanuatu
emsc,2012-04-14 22:05:25, -18.952, 168.799, 6.3, 3.0, Vanuatu
emsc,2012-04-14 10:56:18, -57.622, -65.327, 6.2, 10.0, Drake Passage
usgs,2012-04-14 10:56:18, -57.588, -65.414, 6.2, 9.9, Drake Passage

The other is the forum posts that you have seen from me from time to time. The full version stores all the images and travel times/phase data html files for use in my blogs, but I have decided a cut down version (that does not do much storing except the html page) would be useful since trying to get all the info together on the new USGS site is a bit of a nightmare.

The function produces this for USGS earthquakes and all you have to do is right click a line in the program! (I am working on the EMSC version at present.)

Magnitude 4.7 - Ishigaki, Japan

Location in Google Maps

• Date-Time: Saturday, April 21, 2012 @ 09:45:52 UTC
  
• Earthquake location: 23.23350°N, 123.70350°E,
  
• Earthquake depth: 30.1000
  
• Distances:
  131km (81mi) from Ishigaki, Japan
  229km (142mi) from Hualian, Taiwan
  236km (146mi) from Hirara, Japan
  241km (149mi) from Su'ao, Taiwan
  985km (612mi) from Hong Kong, Hong Kong
  
• Event ID: usc00098tg
  

Derived from Event Data Source: USGS
Powered by QVSData


Sooooooooooooon, promise!

Forgot to add, for those of you who have blogs the program will also produce the lists in one of 2 styles - Table style and Unordered List.

reply to post by PuterMan

That's magnitude 8, or maybe 7.9 is a better number.

Check out Miaki Ishii's page at Harvard, watching 1200-1350s in the movie. As her work is short-period, it appears somewhat smaller than M8, and she seems to attribute it to three distinct patches of ground - seems unlikely but maybe it's right:
www.seismology.harvard.edu...

Here is the USGS page, they call it M7.9, note details are scarce on an event in the coda of an M9:
earthquake.usgs.gov...

This paper says "The Mw 9.0 mainshock occurred on March 11, 2011, at 5:46 UT. The Mw 7.4, 7.7, and 7.5 aftershocks followed the mainshock at 6:08, 6:15, and 6:25 UT, respectively, on the same day."
www.terrapub.co.jp...

One could call it part of the mainshock, the details remain murky, and most studies quit before the 10-minute mark and ignore it, but clearly the earthquake quit for a while, then had another major slip episode, or several.

Here is a good read about "Earthquakes and their causes and effects". beginning on pg. 209

Its taken from the "American Journal of Science from 1825" and Newton is quoted. Pretty cool so I wanted to share.

books.google.com... 6gzYiJeMV0&hl=en&sa=X&ei=bbiST5z1DZHk6QHT0qWFBA&ved=0CEsQ6AEwBw#v=onepage&q=Popocatepetl%20and%20new%20madrid%20related&f=false

reply to post by JohnVidale


Thanks John.

Yes the 7.9 I have.

Happy birthday my friend!!!

I shall raise a glass of red to you later tonight......

Rainbows
Jane

Have a lovely day & evening - glass of Campo Viejo (Rioja) raised to you - make that two !

Central California (3.2) and North Atlantic 4.5/6 having the bumps - are you ?


www.emsc-csem.org...

reply to post by PuterMan


Happy Birthday to You! Happy Birthday too You!! Happy Birthday Dear Puterman!!! Happy Birthday toooooo YOU!!!! I'll dedicate this whole bottle of Champagne to you to celebrate your Birthday and a shot or two of Vodka too

Oh yeah staying on topic

4.5 2012/04/21 15:52:26 13.124 -57.892 15.0 NORTH ATLANTIC OCEAN

Source

reply to post by PuterMan


So why is that occuring here?
I think I got the pulses seperated, I had to colour code the points of P, S and LR waves arrival times on each line to see it.
Looks like the P wave of the 2nd quake arrived just a second before the S wave of the 1st quake, the the S wave of the 2nd quake arrived 7 minutes before the LR wave of the 1st one.
Because the 3rd quake was later it is easy to see it as a seperate event. They are all really drawn out though, the 1st one hardly able to see it. so how can the first 2 be the same size magnitude (as in RAS and Geofon) or how can the 2nd one be smaller than the 1st one (as in USGS)
I think Geofon, USGS and RAS have all got it wrong, based on SNZO's graph, GeoAu seems to match the graph better.
6.3 for the last one? seems a bit high, but RAS has the same as GeoAu.

Geofon
6.0 2012-04-20 23:14:29 (revised to 5.6), 2.21°N, 93.34°E, 10, Off West Coast of Northern Sumatra
5.8 2012-04-20 22:28:58, 3.31°N, 93.81°E, 10, Off West Coast of Northern Sumatra
5.8 2012-04-20 22:19:44, 3.28°N, 93.82°E, 10, Off West Coast of Northern Sumatra
USGS
5.7 , 2012/04/20 23:14:31, 2.239, 93.400, 25.0, Off W coast of Northern Sumatra.
5.5 , 2012/04/20 22:29:00, 3.280, 93.858, 28.3, Off W coast of Northern Sumatra.
5.6 , 2012/04/20 22:19:46, 3.261, 93.850, 16.9, Off W coast of Northern Sumatra.
GeoAu
6.3, 2012/04/20 23:14:35, 2.262, 93.431, 55, Off W coast of Northern Sumatra.,
5.7, 2012/04/20 22:28:57, 3.214, 93.806, 0, Off W Coast of Northern Sumatra.,
5.4, 2012/04/20 22:19:43, 3.208, 93.753, 0, Off W Coast of Northern Sumatra.,
RAS
6.3 2012-04-20 23:14:30.7, 2.24, 93.36, 33, Off w coast of Northern Sumatera
5.6 2012-04-20 22:28:56.8, 3.33, 93.81, 15, Off w coast of Northern Sumatera
5.6 2012-04-20 22:19:44.5, 3.30, 93.82, 20, Off w coast of Northern Sumatera

heres my marked SNZO anyway.
Time to move on, spent way too long on that.

BTW I didn't bother listing EMSC, they just towing the USGS line (ass backwards 1 & 2)

reply to post by PuterMan

Happeey Birfday, hic. Bother! With too much vodka I toasted you.

Totally off topic, many thanks to all of you for the Birthday wishes. I am so glad that some of you apparently enjoyed quantities of booze on my behalf. If you folks did not do it it just would not happen as I don't drink the stuff, but cheers to you all anyway.

By the way the Columbia seismic catalogue which Olivine found for me again (I had mislaid it) has earthquakes in Columbia going back to 1993 way down to Magnitude 1. Many of them now reside in my expansive database as well.

I passed the 1,000,000 records and am on the way to 1,250,000. Columbia may get me there!

And I have hardly started yet!!