Quake Watch 2010

reply to post by harryhaller

Cheers for the info.

At first glance a 5 mag seems quite high for a mine collapse, but the very same thing happened at Kalgoolie in Australia just a few months ago.

Originally posted by harryhaller
reply to post by jumpingbeanz

 

Further to your post, we had 4 confirmed tremours yesterday:
www.news24.com... 20100422

The conventional answer is always "mining shafts collapsing" since we're not near any fault lines.

It follows a 4.3 about a month ago.
I'm in Johannesburg SA.

Not near any fault lines (??) but that quake was right on top of the tectonic plate boundary.

[atsimg]http://files.abovetopsecret.com/images/member/82b3875b7411.png[/atsimg]

Only a small fault line!!!!!!!!!!!!!!

reply to post by muzzy

what I'd like to see is a map of ALL the events.

I will see what I can come up with

That tends to lean towards that these are all aftershocks of the Baja 7.2, including the 5.7

Definitely agreed on that. No doubt about it.

[edit on 15/6/2010 by PuterMan]

reply to post by PuterMan


I stand corrected Puterman. I know diddly about this, just a "local commoner" type perspective.

Could you advise where i could see more info on the region? I haven't found when i've looked before, it really is news that we're on a fault line.

I thought we were in the middle of the african plate, solid rock all around.

reply to post by harryhaller


The zone there is actually a rift boundary but it is classified under tectonic plate boundaries by the USGS (in GE as I showed). It runs up from the convergent plate boundary in the ocean below SA.

I will see if I can source some more info for you.

reply to post by PuterMan


Good one, I never thought to look on GE and open the Tectonic Plates file off USGS.

I'd give you a star if I knew how you do it

I read on the other post last night about the Cal 5.7 someone said "3500 aftershocks from the 7.2 " and freaking out.
I can't find the quote now but in reply I'd have to say its not unusual at all!.

Heres an example of a 7.2Mw with more;

"There were 6365 aftershocks in the following 30 days up to the 21st September, and a further 1353 to the end of 2003 including 34 four plus magnitude and one 5.181ML
Two hours after the main event there was a a 6.14ML strong aftershock and another large 6.001ML on the 4th September.
In the 30 days following there were 17 aftershocks between 5.003ML and 5.883ML, nine within the first 40 minutes;"

Fiordland 7.2Mw in 2003

after the end of the year I stopped counting

Seems to me the Baja 7.2 has been quite a low count in comparison.

I might do a map on the Baja myself, its just a matter of defining the co-ordinates of the search, and getting a rainy day to do it.

[edit on 15-6-2010 by muzzy]

reply to post by harryhaller


I have to admit that I am finding it very difficult to find specific information about that fault/rift zone. I am wondering why?

These people might be able to help you: University of the Witwatersrand, School of Geosciences, South Africa

The Bushveld Complex
PDF file

This is a fascinating area. An igneous intrusion zone and if I am reading all this right a meteor impact site.

Yes managed to confirm that - in fact there are two known major impact sites. This first one shows the centre just near that last earthquake (4.8)

[atsimg]http://files.abovetopsecret.com/images/member/d37254fc88e2.png[/atsimg]

And there is another close by

[atsimg]http://files.abovetopsecret.com/images/member/998f6b25a2fa.png[/atsimg]

Edit: You can get the Google Earth files for deep impact meteor sites here

This is getting to be very interesting indeed. SA has 89% of the known world reserves of platinum group metals. Guess who surveyed that? USGS.

More about the Bushveld Complex
PDF file

Page 24 had a location map and page 26 shows faults.

Latest estimates (PDF) of platinum and palladium reserves

OK, this one details the Taaiboschgroet Fault Zone and drilling for water. This is a bit further NE of the other area.

More PDF files

Faults in deep mines This one relates in particular to earthquakes associated with faults in deep mines.

Cape Town — If a new nuclear power station is constructed at Koeberg (Duynefontein), it will have to be able to withstand short periods of tectonic (earthquake) activity occurring within 320km, as well as movements along any known geological fault lines in this area.

This is according to a draft scoping report for Eskom's planned second nuclear plant and associated infrastructure, released for public comment.

Source Unfortunately they require a subscription to read the article, and to do that you have to register. It looks as if you might not have to pay but apart from the article the site is of no interest to me personally.

Certainly the comment about mining would seem to be correct, but again the full article is one of those pay for jobs. I really hate them.

Of course there are the usual fear-mongers as well:

The Daily Star has suggested that South Africa will experience an Earthquake during the 2010 World Cup.

An expert has predicted the country is almost certain to be hit by a major natural disaster.

And it could strike during this summer’s footie tournament.

Source

This report looks really interesting, but the pictures did not come up for me. However I discovered that there are links at the bottom of the report and these do bring up the pictures. Figures 3 shows the 21 fault/rift zones in the study. Unfortunately it is very small and does not blow up well.

This PDF file is absolutely fascinating and deals with the Pretorius fault. For the location - and the location of the lab 3.6km BELOW the surface see page 4. (Fault reactivated due to current mining). The stresses here means that quartzite must be screaming (piezo-electrically that is). The site with the link for the PDF.

This The Rupture Zone of the M=2.2 Earthquake that Reactivated the Ancient Pretorius Fault in TauTona Mine, South Africa is another reference to the above.

That will have to do for the moment, despite that fact that I did not find the exact thing I was looking for. Maybe I will try again another day. Much reading to be done now!

reply to post by muzzy


Is easy peasy lemon squeezy

[atsimg]http://files.abovetopsecret.com/images/member/4d831ac93522.png[/atsimg]

reply to post by muzzy

Seems to me the Baja 7.2 has been quite a low count in comparison.

10,200+ and counting so far.

[edit on 15/6/2010 by PuterMan]

Light earthquake rattles northern Sweden, felt in Finland -wireupdate.com...

Originally posted by muzzy
I know Puterman has done graphs since the 7.2, what I'd like to see is a map of ALL the events.

And thus I produce a map! Hope you can see what you want on this which is an Excel scatter chart of all 10,000+ quakes overlaid onto Google Earth.

The top Excel layer I can change the blend for if you can't see it, but basically all the blue is the events. You can see they lie all around the current ones you can make out underneath. Some are direct matches so the registration of the two layers is fairly accurate. (Paint Shop Pro XI)

reply to post by PuterMan


Great work, as always Puterman.. it is always appreciated by me.

Magnitude 7.0 NEAR THE NORTH COAST OF PAPUA, INDONESIA

** REVISED TO 6.4***

Date-Time

* Wednesday, June 16, 2010 at 03:16:29 UTC
* Wednesday, June 16, 2010 at 12:16:29 PM at epicenter

Location 2.141°S, 136.460°E
Depth 28.8 km (17.9 miles)
Region NEAR THE NORTH COAST OF PAPUA, INDONESIA
Distances

* 185 km (115 miles) N (5°) from Enarotali, Irian Jaya, Indonesia
* 299 km (186 miles) ESE (118°) from Manokwari, Irian Jaya, Indonesia
* 473 km (294 miles) W (275°) from Jayapura, Irian Jaya, Indonesia
* 1077 km (669 miles) SSE (168°) from KOROR, Palau

[edit on 15-6-2010 by MoorfNZ]

MAP 7.0 2010/06/16 03:16:30 -2.141 136.460 28.8 NEAR THE NORTH COAST OF PAPUA, INDONESIA

MAP 6.4 2010/06/16 03:06:05 -2.450 136.497 25.1 NEAR THE NORTH COAST OF PAPUA, INDONESIA

Some reports now show two quakes - waiting to see if updated but current listed as two separate events.

Now two 5.0's off Alaska

MAP 5.0 2010/06/16 03:56:13 51.513 -173.690 49.0 ANDREANOF ISLANDS, ALEUTIAN IS., ALASKA

MAP 5.0 2010/06/16 03:33:59 58.327 -139.040 10.0 OFF THE COAST OF SOUTHEASTERN ALASKA

Cripes - now another (the third) 6.0+ off Papua

MAP 6.3 2010/06/16 03:58:12 -2.560 136.520 33.0 NEAR THE NORTH COAST OF PAPUA, INDONESIA

That's three in under one hour.

reply to post by PuterMan


Great stuff

reply to post by MoorfNZ

Thats an unusual sequence eh 6, 7, 6

Checked Geofon, they the biggest one at 7.2

16/06/2010 03:06:03.0, 6.3, 2.32 S , 136.58 E , 10, M , Irian Jaya Region, Indonesia
16/06/2010 03:16:30.0, 7.2, 2.16 S , 136.48 E , 19, M , Irian Jaya Region, Indonesia
16/06/2010 03:38:17.0, 5.4, 2.14 S , 136.77 E , 10, A , Irian Jaya Region, Indonesia
16/06/2010 03:58:09.0, 6.5, 2.32 S , 136.58 E , 10, M , Irian Jaya Region, Indonesia
16/06/2010 05:31:04.0, 4.6, 1.98 S , 136.33 E , 10, M , Irian Jaya Region, Indonesia
16/06/2010 05:43:24.0, 4.6, 2.26 S , 136.80 E , 10, M , Irian Jaya Region, Indonesia

Originally posted by muzzy
If anyone can provide the data to show a build up before any historic big event then I'd be pleased to change my thoughts on this.

This is hardly an 'historic' big one but it does show a build up and I guess it would show more of a build up if we had access to events in that region under 4.5

Date/Time UTC,Latitude,Longitude,Magnitude,Depth(Km),Location
11/06/2010 02:29:52,-6.6329,153.4004,4.70,75.60,New Britain region. Papua New Guinea
13/06/2010 17:51:24,-5.9816,147.6370,5.20,58.30,eastern New Guinea region. Papua New Guinea
16/06/2010 03:06:05,-2.4499,136.4967,6.40,25.10,near the north coast of Papua. Indonesia
16/06/2010 03:16:29,-2.1412,136.4603,7.00,28.80,near the north coast of Papua. Indonesia
16/06/2010 03:38:18,-2.4849,136.6429,5.10,35.00,near the north coast of Papua. Indonesia
16/06/2010 03:58:10,-2.3681,136.4803,6.20,19.90,near the north coast of Papua. Indonesia

Just a thought.

Edit - looks like this is the sequence you posted anyway. (Maybe it should only be the last 4)

Re Baja
The count is now 10,600 +. I have managed to get these into a KML file so you can see the locations actually in GE and zoom in on places.

Download the KML file from 4shared. It is around 2 Mb.

[edit on 16/6/2010 by PuterMan]

earthquake.usgs.gov...

MAGNITUDE 4.8 - BAJA CALIFORNIA - MEXICO
Date-Time Wednesday, June 16, 2010 at 22:32:03 UTC
Wednesday, June 16, 2010 at 03:32:03 PM at epicenter
Time of Earthquake in other Time Zones

Location 31.034°N, 115.641°W
Depth 6 km (3.7 miles) (poorly constrained)
Region BAJA CALIFORNIA, MEXICO
Distances 43 km (27 miles) SSE (167°) from L�zaro C�rdenas, Baja California, Mexico
46 km (28 miles) NE (50°) from Vicente Guerrero, Baja California, Mexico
74 km (46 miles) W (273°) from San Felipe, Baja California, Mexico
131 km (82 miles) SE (135°) from Ensenada, Baja California, Mexico
211 km (131 miles) SE (142°) from Tijuana, Baja California, Mexico

Location Uncertainty horizontal +/- 2.6 km (1.6 miles); depth +/- 31.6 km (19.6 miles)
Parameters Nph= 25, Dmin=157 km, Rmss=0.48 sec, Gp=313°,
M-type=local magnitude (ML), Version=4
Source California Integrated Seismic Net:
USGS Caltech CGS UCB UCSD UNR

Event ID ci14753500

reply to post by PuterMan


well done.
I downloaded it and you can certainly see the concentration of aftershocks is thicker in the northern cluster.

Having a look at what USGS have to say The 7.2 mainshock location that USGS has on Significant Quakes 2010 show the epi-centre 3km NW of Durango in the southern cluster (Lat: 32.2587 Lon: -115.2872), and the same on the Google Maps, yet on their 708 Aftershock map its shown as being approx. 10km to the SW in the mountain range (32.13°N 115.3°W)

You haven't got any details behind the kml Placemarks
I know its hard labour I find the NZ Geonet downloads are easy to work with as their csv file break down into columns, but the USGS/NEIR data comes in text format with commas and it takes a bit of jiggling around in Excel to get it into columns so you can convert to kml.

I'll give it a go, the Geonet site is currently not providing any data so I have some time to spare.

Where did you get the co-ordinates data from?



[edit on 17-6-2010 by muzzy]

[atsimg]http://files.abovetopsecret.com/images/member/19d7e00f8ebb.gif[/atsimg]

what the ? is going on...

edit to add, no 5+ quakes for 19 hours now.

Last 5+ was
5.1 2010/06/16 12:24:43 HALMAHERA, INDONESIA

[edit on 17-6-2010 by berkeleygal]