Oklahoma Earthquakes 2011

[ljbab728]

SkyWest Post 171:
Maybe the Oklahoma Museum of Science and Arts--formerly known as Omniplex--will be open tomorrow.
I seem to recall that they had an earthquake simulator.
Unless the earthquake broke it.

We obviously no longer need an earthquake simulator. LOL

[RadicalModerate]

Tru Dat.

[venture]

Magnitude
3.6
Date-Time
Sunday, November 06, 2011 at 04:03:41 UTC
Saturday, November 05, 2011 at 11:03:41 PM at epicenter
Location
35.554°N, 96.760°W
Depth
5 km (3.1 miles)
Region
OKLAHOMA
Distances
8 km (5 miles) SE (139°) from Sparks, OK
10 km (6 miles) NW (319°) from Prague, OK
14 km (9 miles) ENE (63°) from Meeker, OK
28 km (18 miles) NE (34°) from Shawnee, OK
71 km (44 miles) E (83°) from Oklahoma City, OK
306 km (190 miles) N (0°) from Dallas, TX
Location Uncertainty
horizontal +/- 15.1 km (9.4 miles); depth +/- 3.1 km (1.9 miles)
Parameters
NST= 12, Nph= 16, Dmin=95.7 km, Rmss=0.42 sec, Gp=119°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=B
Source
Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID
usb0006km5

[RadicalModerate]

"3.6" indeed . . . (yeah, right)

Obviously, someone's instruments need to be recalibrated.
I heard on the The News (9) that it was a 5.(sumpin).
And I have a feeling they were right.

[venture]

Obviously, someone's instruments need to be recalibrated.
I heard on the The News that it was a 5.(sumpin).
And I have a feeling they were right.

That was an aftershock. The 5.6 is back a few pages by now.

[venture]

[MDot]

That was an aftershock. The 5.6 is back a few pages by now.

I haven't felt any aftershocks yet; hopefully I won't.

[RadicalModerate]

I guess it's about time to reset the clock and go to sleep . . .

So how far are we from New Madrid, Mo . . . .?

[venture]

New Madrid is out in SE Missouri and Arkansas. So nothing for us to worry about...for the most part.

The Wilzetta Fault where these are occurring is of course the most concerning, but also the Meers fault in the Wichita Mountains.

[venture]

Magnitude
3.0
Date-Time
Sunday, November 06, 2011 at 04:54:00 UTC
Saturday, November 05, 2011 at 11:54:00 PM at epicenter
Location
35.540°N, 96.687°W
Depth
5 km (3.1 miles)
Region
OKLAHOMA
Distances
6 km (4 miles) N (1°) from Prague, OK
11 km (7 miles) WNW (289°) from Paden, OK
14 km (9 miles) ESE (123°) from Sparks, OK
31 km (20 miles) NE (45°) from Shawnee, OK
77 km (48 miles) E (85°) from Oklahoma City, OK
305 km (190 miles) N (2°) from Dallas, TX
Location Uncertainty
horizontal +/- 11.2 km (7.0 miles); depth +/- 2.3 km (1.4 miles)
Parameters
NST= 16, Nph= 21, Dmin=91.3 km, Rmss=0.94 sec, Gp= 79°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=5
Source
Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID
usb0006knm

[RadicalModerate]

"Nothing to worry about . . . for the most part."

Yeah . . . That's probably what the folks in Prague and Sparks thought about the Jones AnomolySwarm. =)

[shriekingviolet]

Hey i was asleep for the one last night/early a.m. and I'm curious to know if anyone who felt the tremor last night can say that this one felt x% stronger/shakier...I am not a scientist but the scale is supposed to account for "exponential" change, so from 4.7 to 5.6 should be like 8 or 10 times as strong, or maybe i am misunderstanding the measurement system.

I was awake for the 4.7 and definitely noticed a difference. While I felt the shakes and vibrations for the 4.7, they were just strong enough to be obvious for what they were but not enough to be really jarring (at least not from the ground floor of my house). The 5.6 shakes went on for what felt like twice as long and were strong enough that I felt a little disoriented afterward. The rumbling and creaking of my house was definitely louder too. I don't know that I'd say they felt 10 times stronger, but it was no small difference in strength.

[ljbab728]

Magnitude
3.0
Date-Time
Sunday, November 06, 2011 at 04:54:00 UTC
Saturday, November 05, 2011 at 11:54:00 PM at epicenter
Location
35.540°N, 96.687°W
Depth
5 km (3.1 miles)
Region
OKLAHOMA
Distances
6 km (4 miles) N (1°) from Prague, OK
11 km (7 miles) WNW (289°) from Paden, OK
14 km (9 miles) ESE (123°) from Sparks, OK
31 km (20 miles) NE (45°) from Shawnee, OK
77 km (48 miles) E (85°) from Oklahoma City, OK
305 km (190 miles) N (2°) from Dallas, TX
Location Uncertainty
horizontal +/- 11.2 km (7.0 miles); depth +/- 2.3 km (1.4 miles)
Parameters
NST= 16, Nph= 21, Dmin=91.3 km, Rmss=0.94 sec, Gp= 79°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=5
Source
Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID
usb0006knm

Still awake and didn't notice that at all.

[venture]

"Nothing to worry about . . . for the most part."

Yeah . . . That's probably what the folks in Prague and Sparks thought about the Jones AnomolySwarm. =)

"There is no Jones AnomolySwarm of quakes or earth shakers. Please go about your daily lives."

[venture]

[venture]

Magnitude
3.8
Date-Time
Sunday, November 06, 2011 at 06:31:10 UTC
Sunday, November 06, 2011 at 01:31:10 AM at epicenter (the first 1:31 AM LOL)
Location
35.559°N, 96.874°W
Depth
5 km (3.1 miles)
Region
OKLAHOMA
Distances
7 km (4 miles) NNE (17°) from Meeker, OK
7 km (5 miles) SW (221°) from Sparks, OK
16 km (10 miles) NNW (347°) from Johnson, OK
25 km (15 miles) NNE (13°) from Shawnee, OK
60 km (38 miles) E (82°) from Oklahoma City, OK
307 km (191 miles) N (359°) from Dallas, TX
Location Uncertainty
horizontal +/- 17.3 km (10.7 miles); depth +/- 2.4 km (1.5 miles)
Parameters
NST= 49, Nph= 53, Dmin=105.8 km, Rmss=0.46 sec, Gp= 36°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=6
Source
Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID
usb0006knw

[RadicalModerate]

At the end of the day, I'm simply thankful that all of the engineers and builders of local reservoir dams took all of this potentially unexpected geological activity into account when planning and executing the projects that serve all of us today. And long before the events currently under discussion took place for the first time.

[venture]

Interesting image from OUN... saved it on storm scope to make sure it doesn't vanish. You'll need to wait about 10 seconds for the image to change to the post earthquake one.

[MDot]

That's pretty cool venture. Thanks for that.

[FRISKY]

The coyotes are completely quiet tonight. Very unusual.

[venture]

Magnitude
3.2
Date-Time
Sunday, November 06, 2011 at 07:32:40 UTC
Sunday, November 06, 2011 at 02:32:40 AM at epicenter
Time of Earthquake in other Time Zones
Location
35.544°N, 96.901°W
Depth
4.9 km (3.0 miles)
Region
OKLAHOMA
Distances
23 km (14 miles) N of Shawnee, Oklahoma
56 km (34 miles) E of OKLAHOMA CITY, Oklahoma
60 km (37 miles) NE of Norman, Oklahoma
60 km (37 miles) SE of Guthrie, Oklahoma
Location Uncertainty
horizontal +/- 19.1 km (11.9 miles); depth +/- 3.1 km (1.9 miles)
Parameters
NST= 19, Nph= 22, Dmin=108 km, Rmss=0.16 sec, Gp=112°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=6
Source
Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID
usb0006kph

Magnitude
3.4
Date-Time
Sunday, November 06, 2011 at 09:22:04 UTC
Sunday, November 06, 2011 at 03:22:04 AM at epicenter
Location
35.585°N, 96.823°W
Depth
5 km (3.1 miles)
Region
OKLAHOMA
Distances
3 km (2 miles) S (185°) from Sparks, OK
12 km (7 miles) NE (35°) from Meeker, OK
15 km (9 miles) SSE (156°) from Chandler, OK
29 km (18 miles) NNE (20°) from Shawnee, OK
65 km (41 miles) E (80°) from Oklahoma City, OK
310 km (192 miles) N (359°) from Dallas, TX
Location Uncertainty
horizontal +/- 13.2 km (8.2 miles); depth +/- 3 km (1.9 miles)
Parameters
NST= 27, Nph= 41, Dmin=100.2 km, Rmss=1.37 sec, Gp= 58°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=5
Source
Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID
usb0006kqi

[BBatesokc]

We've felt three in the past, one came with a boom sound, the one the other day was barely noticeable to us, but last nights got our attention. Dogs started whining and then about 7 seconds later the rattling started. Last long enough we were able to wakeup and even sit up before one golf actually moved us a bit.

We actually sustained damage though from the one last summer. A concrete walkway around our Koi pond buckled. When the sun comes up we'll be looking about for any damage from this one.

[bombermwc]

There was one last night at 11pm that isn't reported on the OKGS site very well either...they must not keep this thing live. The USGS reported it as a 5.2!!!!! This one was strong enough to make the chain on my ceiling fan rattle on the glass globes. You could hear a bit of the "rumble" too.

[Jim Kyle]

I am not a scientist but the scale is supposed to account for "exponential" change, so from 4.7 to 5.6 should be like 8 or 10 times as strong, or maybe i am misunderstanding the measurement system.

I felt the one tonight, living in nw okc, and figured it was somewhat "major" but had no idea what the actual reading would be. really i'm just curious about the small increments changing, like last night was 4.7, the prelim reports were 5.2 for the one tonight and then revised to 5.6?

The scale is logarithmic, so an increase from 4.0 to 5.0 would be 10 times stronger. Going from 4.7 to 5.6 is an increase of 0.9, so your "8 to 10" estimate is right on; it would be 8 times as strong.

I've only felt two quakes in my lifetime, neither of them during the two-plus years I spent in Southern California. The first was the 1952 El Reno quake, a 5.5, and the other was at 10:53 p.m. last night. In 1952 I was in a classroom on the second floor of the armory at OU, and it felt like a large truck had slammed into the building. It was a single sharp shock, with a sound like a gunshot. Last night I was at my computer when I began hearing a distant rumble that at first I thought was a low-flying helicopter. After a few seconds it grew louder and the room began to vibrate. That went on for some 15 to 30 seconds (possibly 45 though I don't think it was that long), and it died away.

The rated difference between the two was only 0.1 but last night's definitely felt much stronger of the two. Could be the difference in depth, I suppose. I'm near NW 122 and Council Road in OKC.

[bandnerd]

I'm starting to think my father-in-law isn't crazy for having earthquake insurance.