Quake Watch 2012

update to post by PuterMan


Update on El Hierro. Popping away so it is.

26 events 2.5+ with the last a series of Mag 3+. 69 events today from the IGN catalogue. I am trying to keep my blog page updated but it is going too fast.

See also some GPS info on volcano watch.

ETA: Here is a (very small) map of the uplift. See my blog for the full size version (signature)

reply to post by PuterMan

I thought my alerts had gone wrong. One after the other and still coming. So glad to see you post.

The 5.8 [USGS] in the Kuril islands is flagged 6.0 by EMSC and 6.1 by Japan

Magnitude 6.0 - Kuril Islands

Location map by EMSC (Google Map)

• Date-Time: Sunday, July 08, 2012 @ 11:33:01 UTC
  
• Earthquake location: 45.532°N, 151.249°E,
  
• Earthquake depth: 10.0 km
  
• Distances:
  835 km NE Sapporo (pop 1,883,027 ; local time 20:33:01.7 2012-07-08)
  613 km E Kitami (pop 113,137 ; local time 20:33:01.7 2012-07-08)
  513 km NE Nemuro (pop 31,223 ; local time 20:33:01.7 2012-07-08)
  
• Event ID: 277210
  

Derived from Event Data Source: EMSC
Powered by QVSData




SCARDEC have 6.1 Mw

locations of Hierro / katla and santorini are in an nearly perfect triangle.....

reply to post by ressiv


I am assuming that you are measuring on a flat map? What is even more surprising is that on the curved surface they are also almost in a perfect triangle.

reply to post by PuterMan

i draw the lines also on google earth... :-)...seen from the cente rof the( pyramid) -triangle its amazing

Monday morning whine
Whine 1. I think I'll delete that realtimeearthquakemapthingy that usgs came upwith.
Yesterday I decided to mark up a few SNZO graphs I had downlaoded since 23/06.
Started by looking at the realtimeearthquakemapthingyas that is the replacement for the 30 days list.
Set the bars at 30 days and the results started on 29/6 which although mathmatics wasn't my strongest subject at school I have figured out using my fingers is only 11 days ago.
Useless.
looks like this page is all we have to work with now
hazards.cr.usgs.gov...

Whine 2. Cross referencing that with the Latest Earthquakes in the World - Past 7 days

That Rangipo quake on Saturday is listed as 5.0mb in the LEW7days and 5.7ML in the phase data
but
5.3mb, 5.7ML in the weekly list

JUL 07
005025.8 39.146S 175.691E 83 5.3 (mb) A 1.2 53 56 NORTH ISLAND OF NEW ZEALAND. ML 5.7 (WEL). ML
5.7 (WEL). Felt at Opotiki and Taihape. Felt widely on North Island

Useless


Have a nice week

Quakeage going on near home.

Magnitude 4.4 - LABRADOR, NEWFOUNDLAND AND LAB., CANADA
Sunday, July 08, 2012 at 11:13:38 UTC
18 km (11.2 miles)

There was another to the east a few days ago.

Historical seismicity seems to suggest that the 4.4 was the first of the area (transform fault).

At least since 1990.

reply to post by murkraz


Cape breton,
Felt nothing,
hard too tell with,,, todays car stereor's amps,boom boom,,,,

Originally posted by BobAthome
reply to post by murkraz

 

Cape breton,
Felt nothing,
hard too tell with,,, todays car stereor's amps,boom boom,,,,

edit on 8-7-2012 by BobAthome because: (no reason given)

lol, you are too far. So am I, though.

I've never felt an EQ. I might think the world is ending if I ever do.

reply to post by muzzy

Whine 1. I think I'll delete that realtimeearthquakemapthingy that usgs came upwith.

I blame the USGS for everything. No seriously - I think this is a pebcak

I had exactly the same problem and was blaming USGS for the error, for climate change, for the economic situation and everything else until I sat down and looked at it.








By the way the number of days changes when you set the source data as I mentioned, along with the magnitude, but I still check it to make sure. I don't trust them! It was written by programmers like me.

I normally use the cookie setting but that gets zapped from time to time so I have saved the bookmark as well.

Have you quake watchers disowned the Pacific NW & Juan de Fuca? And where is Westcoast?

It was mentioned last night on either wired or volcano cafe, but a fella posted this morning that a slow slip was taking place beneath him as he posted.

www.pnsn.org...

reply to post by PuterMan


thanks I'll try that out.
I really want USGS to get their act together, they do some great stuff in other divisions, but the public face seems a shambles these days.

reply to post by muzzy

but the public face seems a shambles these days.

A while ago I finally gave in on the Luzon earthquake in the Philippines and added it to the Mag 6+ quakes on my blog. At the time I stated....

This earthquake is 5.9 Mw or less from every other source on the planet EXCEPT USGS who themselves have it at 5.9 Mw in their tensor solutions. I have no idea what they are playing at but I would not mind betting this WILL be reduced later. It is a pretty stupid game they are playing really. Just makes them look incompetent.

Luzon quake page

It is now 5.9

Prov,Date/Time UTC,Latitude,Longitude,Magnitude,Depth(Km),Location
usgs,2012-06-16 22:18:48, 15.590, 119.556, 5.9, 28.0, Luzon. Philippines
emsc,2012-06-16 22:18:48, 15.692, 119.645, 5.8, 30.0, Luzon Philippines

1,2012-06-16T22:18:53.000Z,15.67670,119.68420,5.8000,80.0,LUZON PHILIPPINES,227728
2,2012-06-16T22:18:53.000Z,15.66670,119.68420,5.9000,80.0,LUZON PHILIPPINES,227729
3,2012-06-16T22:18:51.000Z,15.58690,119.67420,6.0000,60.0,LUZON PHILIPPINES,227730
4,2012-06-16T22:18:51.000Z,15.61690,119.66420,6.0000,60.0,LUZON PHILIPPINES,227732
5,2012-06-16T22:18:51.000Z,15.63690,119.67420,6.0000,60.0,LUZON PHILIPPINES,227800

The second set of figures are the EMSC revisions that took places. The first 4 were within minutes of each other hence the consecutive auto ID numbers at the end. The last one was within 24 hours as it is bracketed by many other changes to quakes on the 16th.

I have no revision flag for USGS which means the quake was NOT revised even once within the first 7 days. I can't say when exactly this was reduced in the ranks other than that it was AFTER 7 days and I believe it was less than 12 days ago when I last ran the checker.

So yes, EMSC did make changes and I have no problem with that. They at least only make changes over a few days. USGS is STILL putting the magnitude out at one value and not making changes on the web site until the quakes is way down the list and gone and forgotten for most people. JV will say it is only a few points. That is not what I am getting annoyed about. It is the persistence in not changing things even though to quake nerds it is obvious that they should be changed.

Of course Joe Public does not care less, but quake nerds are Joe Public as well and more to the point if WE can see it so can other agencies.

Prov,Date/Time UTC,Latitude,Longitude,Magnitude,Depth(Km),Location
emsc,2012-06-22 04:31:16, -54.302, 158.731, 5.9, 2.0, Macquarie Island Region
usgs,2012-06-22 04:31:17, -54.360, 158.790, 5.7, 14.0, Macquarie Island Region

This was 6.0 and again USGS was the only one saying this. Now they have reduced it to 5.7 like GFZ Potsdam.

Prov,Date/Time UTC,Latitude,Longitude,Magnitude,Depth(Km),Location
usgs,2012-06-23 04:34:53, 3.008, 97.926, 6.1, 95.0, Northern Sumatra. Ind.
emsc,2012-06-23 04:34:53, 2.970, 97.893, 6.1, 93.0, Northern Sumatra Ind.

I only record 6.0+ but with this one I created a page for it and noted

See the Provider Magnitude Comparison 2012 tables The GS on the phase data page value appears to be the average of the Mwp values.

My blog page

Basically I knew it would go up and lo and behold it has. Now 6.1 - exactly as EMSC has had all along.

Why did it change? Because EVERYONE else had 6.1 and USGS themselves had 6.2 in the body wave tensor (as I originally recorded on my blog page) yet still they waited to make the change.

OK, who been readin' dis page huh?

I beg to inform you that USGS actually managed to upgrade an earthquake within the 7 days almost.....

Magnitude 6.3 off the west coast of the North Island of New Zealand 03-Jul-12 (b000awz5)

OK well it was 8 days but that is an improvement. At least it was in the same month!

O.K. I have abit of a strange query which may show massive lack of knowledge .....however ..... This southern Americas coast is perplexing me .. I can accept aftershocks from the Chile quake , but there's a rattling going on !

We have Peru, Chile & other areas Argentina a bit (apologies no links) ..it's just smallish and subtle ..

To the question : When a subduction event occurs is it the whole plate or could a middle section (say) splinter and just submerge or even a quadrant ?- do these subduction quakes have to be in their entirity or historically when our continents split apart did they move as one plate or in pieces ? (U.K. looks a bit in pieces !

Well, in our lifetimes we've never had such a move I believe, and if such a thing were to be possible I'd put money on that skinny slither of Galapagos area/Costa Rica splintering off but I hope that never happens of course.

Either way South America appears to be building to something or maybe nothing - but the small and fairly regular quakes have me intrigued.

reply to post by slidingdoor


Are you looking at EMSC to get this? They only recently added Chile as an area so now we are seeing smaller quakes from there as I mentioned a while ago. Since we were not getting them before it appears as if something new is happening, but it is just that we are now getting the information.

If you check what are we seeing against the Chilean site which gives Mag 3.0+ you will find that EMSC is doing the same despite the normal 2.5+ levels it uses.

I don't think the seismicity is much changed from normal. There are three days on that list and the numbers look fairly normal. You can check them out on Muzzy's site as well.

Sorry, got so involved in that explanation I did not answer the question

To the question : When a subduction event occurs is it the whole plate or could a middle section (say) splinter and just submerge or even a quadrant ?- do these subduction quakes have to be in their entirity or historically when our continents split apart did they move as one plate or in pieces ? (U.K. looks a bit in pieces !

Yes indeed they can break into pieces, sometimes many pieces - Jan de Fuca for example, or Farallon or the chunk under the Himalayas.

The UK is not in a subduction zone and the 'pieces' are purely due to land being submerged by rising seas after the ice age. Way things are going they should all get joined together again soon!

reply to post by PuterMan


Many thanks - Yes indeed I rely mainly on EMSC - their YTS (Youth Taining Scheme !) are better at weekends especially than USGS !



Yeah , know the U.K. is not subduction but perhaps more an example of land break-offs .

Having been an avid 3 + years watcher of patterns mostly on EMSC , nothing computable just a registering of where and when it happens and the frequency . I still see the Southern Americas as being small like ruptures - but hey, it could pop elsewhere eventually

AND, yes that makes huge sense if EMSC are only just recently logging Chile properly ...moving on , nothing to note here really then .....

These two quakes today are in the area of the beached dolphins or whatever they were

This is not a good day for a large subduction zone quake.....nor is any other day for that matter!

earthquake.usgs.gov...

reply to post by PuterMan


Yes its pretty poor, they seem to have a problem with the number 6, like they are in denial that it exists, and will only mention it if cornered.

I haven't followed closely as they came in, but there doesn't seem to be the same amount of up and downgrading of Mag 7's , maybe I'm wrong.

Re. our S of Opunake "6.3Mw", interesting they changed the ML as well, it was 7.0ML originally. Now 6.6ML
Everyone here talks about the July 3rd Mag 7 quake, guess they don't pay any attention to what USGS has to say.
On that subject, just noticed tonight while walking up our driveway that one section of panelling has popped out of the frame against one post, hanging by a nail. The post must have moved out of line in the quake.