Quake Watch 2013

reply to post by Olivine

Any chance you felt this one, Puterman?

That one was dedicated to mister Puterman by the TPTB,I mean by the USGS branch of the TPTB.

Originally posted by PuterMan
reply to post by muzzy

 

Also, if my memory serves me right, I believe you were talking about a double hit in the Kermedecs?
ANSS now has that

DateTime,Latitude,Longitude,Depth,Magnitude,MagType,NbStations,Gap,Distance,RMS,Source,EventID
2013/04/26 06:53:28.95,-28.7357,-178.9155,349.02,6.20,Mw,112,22,1,1.32,NEI,2013042620
2013/04/26 06:53:28.90,-28.6810,-178.9160,351.00,6.10,Mw,386,14,1,0.94,NEI,2013042620

Source: ANSS Catalog Search

 

Just to be fair to Useless I looked back on my own data and discovered that USGS did add that second quake some time during the 30 days after the original event.
Much stick is given to USGS but in this instance they did better then EMSC or GFZ, neither of which have posted the second quake.

for USGS this time.

for the others.

I do recall it, it was a deep one out west of the Coleville Ridge, looks like a single event on LISS SNZO 25/26/04
can't check on IRIS, has rolled over now

reply to post by Olivine


Way too far away from me. Never felt a thing. They are drilling for oil somewhere around there. Probably drilling related. I will ask my contact at Dublin University.

ETA: No need. That quake is right where they are drilling

www.thejournal.ie...


reply to post by piequal3because14

That one was dedicated to mister Puterman by the TPTB,I mean by the USGS branch of the TPTB.

They missed then

They really should get better control of HAARP.

reply to post by PuterMan

They missed then

They really should get better control of HAARP.

Ahhh,I knew it,that earthquake gun the use never touch that area ,and they don't know why.

reply to post by muzzy


I think you are probably right. I have the ND.MARNC for every day, and G.SANVU (It hardly shows on that)

ND.MARNC


G.SANVU


reply to post by wujotvowujotvowujotvo


Again, you are probably right. But I guess if they are reporting it it will eventually get sorted out. Until such time I will report it as two unless I can get confirmation from USGS that it is an error earlier.

In the meantime SPYDER has it at 5.9 and only 1 event.

And there I was giving Useless the benefit of the doubt.....

The Mag 6.8 Sea of Okhotsk has been downgraded to 6.7

Yet again I said this would happen the day of the event, or the day after.

Explanation of why I knew this would happen here because I am not writing it all out again!! Laziness rools!

reply to post by PuterMan

So what you are saying is?;
1. Its the body wave moment tensor (Mwb) figure that is the most accurate?
2. USGS review all their data and make the alterations on their public interface (web page) at the 7-days-after mark?

New questions to consider;
1. How often do they change the Mwb itself?
2. If there are several types of MT's presented, which one takes precedence? ie Mwb, Mww, Mwp etc

As far as their catalogs go, this is a summary as far as I can determine.
The daily PDE (QED) - Earthquakes can be added or modified anytime during six weeks.
The weekly PDE (PDE-W) - New files are added on a weekly basis. Data in the weekly PDE files are not modified but are deleted when the earthquakes are published in the monthly PDE. Once the weekly PDE is posted, solutions for that time period are deleted from the daily (QED) files.
[color=lime]The monthly PDE - it is possible that new events are added, old events modified and occasionally some old events from the weekly PDE may be removed.
Source: From the link you gave me when I was asking about QED files.

From my observations of the Chinese network (CEDC) during the Ya'an quake aftershock period and of Geonet (over 8 years) this seems to be common practice in the seismic community (to review and alter data).
I'm not sure which or if at all other networks do the same, never checked, but as far as I do know, the GSRAS don't even bother to review their data at all after its posted on the web.
I think as long as one makes a note of which catalog the number comes from then its all OK.
To that end I have started putting the review-date in each popup tag for preliminary New Zealand quakes.
Because I'm not on this full time, my review period is approx. 6 months-2 years

reply to post by muzzy


No what I was saying is that everyone else had 6.7. USGS had 6.7 on their body wave tensor, yet they kept it at 6.8 on the public web until 9 days after the event. Why?

So 1.1 No Mw is the most accurate but mb is second in the list

For cases where only a single magnitude per event is desired the DMC designates one magnitude as primary for each event using the following precedence (in order):

Magnitude author: GCMT, UCMT, WCMT, NEIC, NEIS, ISC, any magnitude contributed by the NEIC
Followed by magnitude type : MW, MB, MS, ML, MD

For example, if a GCMT-authored MW magnitude is present it will be designated primary over all others.

Magnitude estimates greater than 5.0 from authors or contributors not in the list above will never be designated as primary (the values will remain available).

Source IRIS

That also answers 2.2 I think.

Back to 1.2. No they often change things in a few hours or days. Why certain quakes get 'stuck in the groove' is a mystery to me. Often GFZ and EMSC will have been at the previous value and either dropped or gone up as the case may be, but for some unknown reason USGS sticks until the 8th day. Maybe this is something to do with the PDE but if that is the case then none of the quakes should change.

Then we have quakes that change on the web but remain the same in the PDE. Why?

2.1. The Mwb (or mb) changes often and may end up as Mw, Mi is another common one, Mt and various other designations that only USGS seem to use.

From what I can see it is very unusual to a quake to change after 2 years.

I cant put my finger on it but something is off. A big quake might be about to happen and when i mean big,,,,,,, i mean 9 ish.
Now were at? That's the thing bugging the crap out of me

And when well i say within this month ( June 2013 )

I hope im wrong but when its a bad feeling its usually always right

just had the Caribbean come to mind

Did USGS website stop working the last EQ they have posted is:

M1.7 - 6km NW of The Geysers, California
2013-06-04 07:14:16 UTC

Anyone else experiencing this?

reply to post by whatnext21


They are definitely experiencing technical difficulties. I've got the same 4+ hour lag in reporting.
Most of their data links are currently inoperable,at the moment, such as crustal deformation, northern California seismos, etc.
I hope they aren't "improving" those pages too.

I thought it was just me but yea its stuck.

Now unstuck

You know that Magnitude 4.0 in Ireland?

It wasn't. It was a phantom compliments of an automated French system. I emailed the Head of Seismology in Ireland and he had a fit and sent me an email saying please ring him ASAP.

He was out of the country apparently and had not been notified of the event.

Apparently this French system dumped a Mag 4 in Slovakia a few years ago as well.

So USGS did not miss, they had not even tried!!

Just added 16,131new earthquakes to eqarchives over the last couple of days.
The new monthly ones are;

All 2013 Egypt + 679
May Greece + 1921
May Turkey + 2617
May Iran + 208
May Thailand/Burma + 26
May Italy + 1126
May Chile + 367
May China + 3733
All 2013 Spain + 5454 (El Hierro has contributed 2487 of those; Torreperogil near Ubeda has also been hammered with 1051 micro quakes since Jan 1st 2013, not sure what thats about, was there a big quake there in 2012???)

and transfered over from seabreeze (map instead of satellite) another 16,544
All NZ 2012 + 9346
All NZ 2013 + 7198

so that is 32,675 additions all up
and not a single USGS input
And I haven't even touched Iceland or Japan yet

So anyone here watching the brawley Ca area today?? In the past there has been eq swarms and it looks to be picking up again....brawley area

Actually it is Niland, is it not, which is closer to the Salton Sea, way overdue for a biggie from there.
77 so far today with 3.1 as the largest in Niland. They seem to be split around 44 close to Niland and the other 34 at the southeast side of the sea.

The ruptures generated at least five 7.0 or larger quakes about every 180 years until the early 20th century, when authorities stopped allowing massive amounts of water to flow into the lake 90 miles east-northeast of San Diego, the study says.
The last big quake happened about 325 years ago. "It's possible that ending the diversion re-set the earthquake clock; we're more than 100 years overdue for a quake that could be as big as 7.5,'' said Neal Driscoll, a Scripps geologist who co-authored the study, published Sunday in the journal Nature Geoscience.

reply to post by whatnext21

Thanks for the closer proximity of the quakes... i mentioned "brawley area" which i thought would cover the point i was trying to make??

reply to post by steve95988


I only posted Niland as USGS seems to pin point them as being there but it is all good as Brawley has had their share of swarms too as I remember them being the epicenter of quite a few.

Seems that the map used did not show Niland which is further north of Brawley.

Whoa, what's shaken' on the big island???

M5.2 - 53km SE of Pahala, Hawaii
2013-06-05 00:12:40 UTC

I read somewhere there was activity in the volcano, could this be related...

reply to post by whatnext21


Upgraded to a 5.6
earthquake.usgs.gov...

A hell of a good shake indeed!