Quake Watch 2011

reply to post by PuterMan
What is this?


Latitude 28.6110
Longitude -82.3190
Magnitude 5.9 mb
Depth 15 km
UTC Time 19:01:43 UTC Tuesday November 22nd, 2011
Location Florida Peninsula, Eastern North America
Author teleMb

source(anf.ucsd.edu...

reply to post by PuterMan

Just back from dinner hence slow reply...

Thank you for the excellent data summary. So today's quake in Bolivia is the biggest very deep quake in that region (radius 200 km) in quite some years, then? And quakes that deep are also rather uncommon there.

Hmmm...

No wonder it was bothering me. Okay, some might wonder but never mind about that right now...

Now thinking out loud: were there any large events down on the relatively nearby coastal subduction zone regions within (say) a few days to maybe a couple of weeks of those deep quakes?

reply to post by PuterMan

just outside your search area

1994 Boliva 8.2Mw

reply to post by muzzy

That is one big quake. And the biggest sub-300km quake ever recorded.

People, this really bothers me a lot.

To explain, I was scratching my head because I thought that mention of Bolivia on the "Experiment" thread was not my first. Felt sure I'd already at least mentioned my concerns.

Turns out I did. I must be getting old... The first mention was last Thursday (Nov 17) in this Quakewatch thread! The post is here but it doesn't surprise me that it went unnoticed as it was just a note I dropped in as an edit, because it suddenly came to me that I ought to mention it. All I said then was:

EDIT: Right now I'm concerned about Bolivia. Just saying. (Gut feeling. That's all.)

edit on 17/11/11 by JustMike because: Fixed link and mentioned Bolivia

The "Experiment" thread post was just to log it more-or-less officially as an area of concern.

But like I said it's been bugging me a lot, this "Bolivia" thing. I wrote a U2U to a member earlier today about it (at 09:23 UTC), in fact. I actually began thinking that either I was wrong about "Bolivia" and had misread the word, or else it was something less important and the main event would be elsewhere. Thought of the US and asked other member for opinions on US places that might sound like Bolivia.

Now, though, this event has got me worried. I don't like this at all.

Hoping that nothing bigger comes from it.

Mike

Originally posted by JustMike
reply to post by PuterMan

 

Now thinking out loud: were there any large events down on the relatively nearby coastal subduction zone regions within (say) a few days to maybe a couple of weeks of those deep quakes?

not really, just a 4.6 and a 4.8 coastal Peru
usgs interactive 7 day map

reply to post by JustMike

That is one big quake. And the biggest sub-300km quake ever recorded.

Mm, you got that the wrong way round!

It is also the largest earthquake ever recorded with a focal depth greater than 300 km

en.wikipedia.org...

Generally the mega-quakes are in the shallow earthquake region i.e. sub 70km.

reply to post by muzzy

Sorry, sometimes I know exactly what I mean but I make a mess of letting others get the same message. Especially when I'm pretty shaken. Like now.

What I meant was that in repect of the historical list of larger, very deep quakes, were there major events in the stated subduction regions in the days to couple of weeks following them? (Not necessarily the very rare mag 8 or bigger, but say in the mag 7 range.)

Sorry about putting it so poorly. I feel really stupid.

Mike

reply to post by PuterMan

By sub-300 km I mean below 300 km. Meaning deeper than 300 km.

Yes I can see now that I messed up the term but my point was how very deep that 8.2 was. It's almost incredible to have a big quake that deep.

But I know I'm making little sense and I'm sorry. I am not feeling good right now and my head hurts. Not joiking. My apologies, Puterman. Please excuse me.

Mike

reply to post by diamondsmith

What is this?

It is nothing. That site is very similar to the EMSC site and is very error prone, as we discussed before.

You can pretty much guarantee that the data is an erroneous pick of the Bolivia quake.

Originally posted by PuterMan
reply to post by diamondsmith

 

What is this?

It is nothing. That site is very similar to the EMSC site and is very error prone, as we discussed before.

You can pretty much guarantee that the data is an erroneous pick of the Bolivia quake.

Maybe it's from a parallel universe they deserve a chance to know of our brothers from other peaceful worlds(Orson Welles)

reply to post by JustMike


Nothing to excuse Mike

Yes it is a large magnitude for a deep quake but Mag 7.5+ at greater than 300 Km are whilst not common, a little more frequent

Date, Lat, Lon, Mag, Mag Type, Depth, Location
1903-01-04, -20.0, -175.0, 8.0, UK, 400.0, Tonga Islands, Tonga
1906-01-21, 34.0, 137.0, 7.70, mB, 350.0, Japan - Daini Atsumi Knoll
1909-02-22, -18.0, -179.0, 7.60, mB, 550.0, Salia, Fiji
1954-03-29, 37.032, -3.513, 7.90, M, 627.30, Dúrcal, Spain
1963-08-15, -13.742, -69.332, 7.70, Mw, 552.10, Provincia de Sandia, Peru
1963-11-09, -9.017, -71.601, 7.70, Mw, 585.60, Seringal São Francisco, Brazil
1970-07-31, -1.486, -72.563, 8.0, M, 644.60, Sacanía, Colombia
1972-06-11, 3.864, 124.234, 7.80, Mw, 330.70, Celebes Sea
1973-09-29, 41.907, 130.975, 7.80, Mw, 569.60, Mys Sesura, Russia
1994-03-09, -17.950, -178.417, 7.60, Mw, 563.0, Bacon Island, Fiji
1994-06-09, -13.856, -67.489, 8.20, M, 631.0, Quebrada Tareni, Bolivia
1996-06-17, -7.122, 122.536, 7.90, Mw, 589.70, Pulau Kakabia, Indonesia

Source: USGS Centennial Catalogue

ETA: Added some locations.

reply to post by diamondsmith

As Puterman says, it's likely just a bad pick. And that data is NFP, anyway, as the site says. Only useful for experts and more likely only harmful for those who aren't. Which is why we rarely refer to it as we don't want to confuse people.

I have to sign out. Don't want to make any more half-incomprehensible statements and annoy my friends (which is all of you).

Goodnight all. Stay safe and peaceful.

Mike

Originally posted by JustMike
reply to post by muzzy

 

What I meant was that in repect of the historical list of larger, very deep quakes, were there major events in the stated subduction regions in the days to couple of weeks following them? (Not necessarily the very rare mag 8 or bigger, but say in the mag 7 range.)

after the 8.2Mw in 1994
Magnitude, Date(y/m/d) Time(hh:mm:ss), Latitude, Longitude, Depth, Location, Source
8.2Mw, 1994/6/9 0:33:16.2, -13.841, -67.553, 631, La Paz, Bolivia, noaa
7.1Ms, 1994/6/18 3:25:16, -42.963, 171.658, 13.6, Canterbury, New Zealand, anss
7.2Mw, 1994/7/13 2:35:56, -16.62, 167.518, 33, Vanuatu, usgs
7.3Mw, 1994/7/21 18:36:31.74, 42.34, 132.865, 471, o/s Primorsky, Russia, usgs
7.0Mw, 1994/9/1 15:15:53, 40.402, -125.68, 10, o/s Cape Mendocino, N. California, USA, noaa
8.3Mw, 1994/10/4 13:22:55.8, 43.773, 147.321, 14, Kuril Is., Russia, noaa
7.3Mw, 1994/10/9 7:55:39.5, 43.905, 147.916, 33, Kuril Is., Russia, noaa
7.1Mw, 1994/11/14 19:15:30.6, 13.525, 121.067, 32, Verde Island Passage, Philippines, anss
7.8Mw, 1994/12/28 12:19:23, 40.525, 143.419, 27, E of Honshu, Japan, anss
7.0Mw, 1995/1/6 22:37:34.32, 40.246, 142.175, 26, E of Iwate, Honshu, Japan, usgs
7.3Unk, 1995/1/17 5:46:, 34.6, 135.04, 16, Kobe, Honshu, Japan, iisee
7.5Ms, 1995/2/5 22:51:5.1, -37.759, 178.752, 21, off East Cape, New Zealand, noaa
7.1Mw, 1995/3/19 23:53:15, -4.183, 135.109, 33, Papua, Indonesia, anss
8.0Ms, 1995/4/7 22:6:56.8, -15.199, -173.529, 21, Tofua Arc, Tonga/ Samoa, noaa
7.3Mw, 1995/4/21 0:34:46, 12.059, 125.58, 21, Philippines, noaa
7.2Ms, 1995/5/5 3:53:45, 12.626, 125.297, 16, o/s Samar Island, Philippines, usgs
7.0Unk, 1995/5/14 11:33:, -8.38, 125.13, 11, Ombai Strait, Alor Archipelago, Indonesia, iisee
7.7Mw, 1995/5/16 20:12:44.2, -23.008, 169.9, 20, New Hebrides Trench, noaa
7.5Mw, 1995/5/27 13:3:52.6, 52.629, 142.827, 11, Sakhalin, Russia, noaa
7.2Mw, 1995/7/3 19:50:50.6, -29.211, -177.589, 35, Kermadec Ilsands, usgs
7.1Mw, 1995/7/11 21:46:40, 21.966, 99.196, 12.5, Shan, Myanmar (Burma), anss
8.0Mw, 1995/7/30 5:11:23.6, -23.34, -70.294, 46, Antofagasta, Chile, noaa
7.8Ms, 1995/8/16 10:27:28.6, -5.799, 154.178, 30, Bougainville , Papua New Guinea, noaa
7.2Mw, 1995/8/16 23:10:23.9, -5.771, 154.347, 33, Bougainville , Papua New Guinea, usgs
7.1Mw, 1995/8/23 7:6:2,7, 18.856, 145.218, 594, Northern Mariana Islands, usgs
7.4Mw, 1995/9/14 14:4:31.4, 16.779, -98.597, 23, Cuanacastitian, Guerrero, Mexico, noaa
7.0Mw, 1995/10/3 1:51:23.9, -2.75, -77.881, 24, Morona-Santiago, Ecuador, noaa
8.0Mw, 1995/10/9 15:35:53.9, 19.055, -104.205, 33, El Colomo, Colima, Mexico, noaa
7.1Mw, 1995/10/18 10:37:26.3, 27.929, 130.175, 28, Ryukyu Islands, Japan, noaa
7.2Mw, 1995/10/21 2:38:57.1, 16.84, -93.469, 159, Chiapas, Mexico, usgs
7.3Ms, 1995/11/22 4:15:11.9, 28.826, 34.799, 10, Gulf of Aqaba, Saudi Arabia/Egypt, noaa
7.9Mw, 1995/12/3 18:1:8.9, 44.663, 149.3, 33, Kuril Islands, Russia, noaa
7.1Mw, 1995/12/25 4:43:24.46, -6.903, 129.151, 141, Teun, Indonesia, usgs


but keep in mind todays quake was only a 6.2

Originally posted by TrueAmerican
Hmm, just received a quake in GEE at Yellowstone... Lake area, or close to there.

Waiting on USGS.

Again.

Nothing major, 3.0 or less probably...

edit on Tue Nov 22nd 2011 by TrueAmerican because: (no reason given)

I surprised no one has followed up on this one. It was a 3.0:

event has been reviewed by a seismologist.



Magnitude

3.0



Date-Time

Tuesday, November 22, 2011 at 18:09:41 UTC
Tuesday, November 22, 2011 at 11:09:41 AM at epicenter
Time of Earthquake in other Time Zones



Location

44.459°N, 110.979°W



Depth

4.2 km (2.6 miles)



Region

YELLOWSTONE NATIONAL PARK, WYOMING



Distances

25 km (15 miles) SSE (156°) from West Yellowstone, MT
29 km (18 miles) E (99°) from Island Park, ID
47 km (29 miles) NE (35°) from Warm River, ID
419 km (260 miles) N (10°) from Salt Lake City, UT



Location Uncertainty

horizontal +/- 0.4 km (0.2 miles); depth +/- 1.5 km (0.9 miles)



Parameters

Nph= 29, Dmin=11.2 km, Rmss=0.17 sec, Gp= 90°,
M-type=local magnitude (ML), Version=1



Source

University of Utah Seismograph Stations



Event ID

uu00008543

source



TA, while I agree it is definitely not major, I think it is certainly noteworthy. A 3.0 in a caldera is a little....unsettling.

I maybe have missed it being posted, I think this one snuck in there amongst the discussion of Bolivia, yellowstone, and sources dedicated to experts (ha!), but I noticed this one a few hours before yellow stone and very close to the 37th parallel on theUSGS website:

Magnitude 3.4

Date-Time Tuesday, November 22, 2011 at 14:20:02 UTC Tuesday, November 22, 2011 at 07:20:02AM at epicenter Time of Earthquakein otherTimeZones

Location 36.985°N, 104.952°W

Depth 5 km (3.1 miles) set by location program

Region NEW MEXICO

Distances 45 km (27 miles) WSW of Trinidad, Colorado 46 km (28 miles) WNW of Raton, New Mexico 73 km (45 miles) SSW of Walsenburg, Colorado 170 km (105 miles) NNE of SANTA FE, New Mexico

Location Uncertainty horizontal+/- 6.6km (4.1miles);depth fixed by location program

Parameters NST= 16, Nph= 16, Dmin=263.9 km, Rmss=0.93 sec, Gp= 61°, M-type=local magnitude (ML), Version=A

Source USGSNEIC (WDCS-D)

Event ID us2011tpaq

reply to post by westcoast


West, guess you missed diamond's post here:
www.abovetopsecret.com...

He did follow up, and claimed he was fast...lol. Truth is, I saw the quake in GEE first, and saw the report literally the second it came up on USGS, cause I was waiting on it. BUT due to being post banned at the time, could not report back. I get myself into trouble all too often on ATS in other forums, not here. This thread has become a model of ATS cooperation and friendliness (for the most part). I can't remember the last time a moderator was ever even in here.

As to the 3.0 quake in Yellowstone, yeah it was just inside the western caldera rim:
www.seis.utah.edu...

But in a spot also prone to a lot of little quakes, so seems to be nothing unusual:
neic.usgs.gov...

In fact, I would say it is the typical YS sporadic seismicity that we can expect from the park.

TextEarthquakes associated with a collision boundary define shallow, broad zones of seismic activity that form in complex fault systems along the suture zone. Earthquake patterns in subduction zones are more complex. As the oceanic crust begins to descend, it begins to break into blocks because of tension stress. Shallow earthquakes in the upper part of the subduction zone are a result of shallow-angle thrust faults, in which slices of plates slide like cards in a deck that is being shuffled. Earthquakes also periodically occur as the plate continues to subduct up to a depth of about 670 kilometers (400 miles). First-motion studies of these earthquakes suggest they result from both compressional and tensional forces on the subducting plate.

link(www.cliffsnotes.com...

PM and muzzy, you notice the waffling going on with this Bolivia quake? I mean jeez, comes up as a 6.8, then down to 6.2, and now at 6.6. And the depths all changed too, way beyond the uncertainty +/- figure. Phase data has La Paz as closest station, and that's like over 330 km away. I saw the thing come in on GEE (but was post banned so couldn't report). My initial guess was 5.8 to 6.2 range, but I was having a rough time too trying to pinpoint location. Bolivia could probably use a few seismos.

reply to post by TrueAmerican


I don't know if anyone happened to notice the EMSC version but they came in at 6.9, went down to 6.7 and then 6.6 and stuck there.



USGS had 6.7 to start. This was under a different ID



They changed the ID and brought it down to 6.2 and I said to my DB "I wonder if EMSC will capitulate and bring it down" but I did not have time to examine the phase data. I was quite surprised when EMSC "won".

Is there a link?between this,

Magnitude
5.4
Date-Time
Wednesday, November 23, 2011 at 01:43:47 UTC
Tuesday, November 22, 2011 at 10:43:47 PM at epicenter
Time of Earthquake in other Time Zones
Location
22.829°S, 68.011°W
Depth
141.2 km (87.7 miles)
Region
ANTOFAGASTA, CHILE,source(earthquake.usgs.gov...

and this,Chile's Puyehue volcano: Ash halts flights in Uruguay and Argentina - 22nd Nov 2011

TextChile's Puyehue volcano: Ash halts flights in Uruguay and Argentina - 22nd Nov 2011 Flights were cancelled for several hours in Uruguay and Argentina Tuesday due to volcanic ash from the four-month-long eruption of the Puyehue volcano in Chile, airport authorities said. Laura Vanoli, Uruguay's chief aeronautic meteorologist, said the country was almost entirely covered by an ash cloud. "It's remnants of ash," she said, adding that there will be a risk of disruption as long as the volcano remains active.

source(thecomingcrisis.blogspot.com...

ML = log10(A/A0)