Which is most likely more accurate? OGS or USGS?

I think there are slightly different ways they calculate the magnitude. It's been a few years since I've read about it.

Now we get to see if there are going to any aftershocks or if this was a foreshock.

Yikes! A pleasant thought. :(

Actually (and unfortunately) it could be both as those two things are not mutually exclusive.

They'll revise it later any way.

Imagine, during tomorrow's game, that right after KD slams down a thunderous dunk, a 5.5 quake unleashes.

The Pacers would probably just give up at that point.

Yukong,
It was a loud sound, I'm not sure it sounded like an explosion, a little different sound but very loud. My first thought was an explosion but in about a second it was obviously an earthquake. The difference between your experience and mine is distance. I live 9 miles Northwest of Jones and the epicenter was 4.5 miles Northwest of Jones.
C. T.
This was more a wave action. Two very different experiences.

We're at Twin Peaks watching Bedlam. It shook dust off of all the high wall decorations, neon signs and rattled all the bottles at the bar.

Yukong,
It was a loud sound, I'm not sure it sounded like an explosion, a little different sound but very loud. My first thought was an explosion but in about a second it was obviously an earthquake. The difference between your experience and mine is distance. I live 9 miles Northwest of Jones and the epicenter was 4.5 miles Northwest of Jones.
C. T.

My daughter lives in Jones and said it was a good thing she was already down on the floor wrapping Christmas presents instead of standing up.

Ljbab,
Your daughter and I had the same experience, the epicenter was right between us. I'm glad I was sitting down, with my current health (and age), I'm not very steady. I think I would have hit the floor for sure!
C. T.
My daughter lives in Jones and said it was a good thing she was already down on the floor wrapping Christmas presents instead of standing up.

We're at Twin Peaks watching Bedlam. It shook dust off of all the high wall decorations, neon signs and rattled all the bottles at the bar.

I didn't feel or hear the earthquake while watching Bedlam on TV in Stillwater. Some from Stillwater have reported something, though. BEAT OU!

Read comments here:

Earthquakes in the world on December 7, 2013 (M2.9 or more) - Earthquake in Oklahoma (http://earthquake-report.com/2013/12/06/earthquakes-in-the-world-on-december-7-2013-m2-9-or-more/)

In North OKC/West Edmond, I heard the crack, followed by a rumble to the east, then felt the shaking. I have never experienced the stages of an earthquake like that before.

Definitely felt it here in SW OKC , but not nearly as strong as others. Based on the posts here, it sounds like the more you go west and north, the stronger it was.

Someone just tweeted that yes...OGS and USGS are measuring the magnitude differently, so that is why there will usually be a discrepancy.

Snow...ice...arctic temps...earthquakes...

Yawn. A typical fall day.

I just felt a mild "after shock".
C. T.

I think I just felt an aftershock - not very strong. 1:26pm

A popular resturant in Edmond has a crack running across their dinning room floor that they say was not there this morning.

Yeah, was just about to post the aftershock. Looks pretty small.

http://folkworm.ceri.memphis.edu/heli_current/WMOK_BHZ_US_00.current.gif

http://folkworm.ceri.memphis.edu/heli_current/TUL1_BHZ_TA_--.current.gif

First image is from the Wichita Mountains station, the other is from Leonard which is where OGS is.

Snow...ice...arctic temps...earthquakes...

Yawn. A typical fall day.

Snonado is next. Just wait.

Didn't feel a thing near Lake Hefner, but my sister on the NW side of Edmond felt it enough to call me, and apparently her dog and cat both bolted from the living room. Feel like I missed out on a good one. I was practicing violin with the TV on and the laundry running so I'm pretty sure unless a car drove through my house, I wouldn't hear or feel anything lol.

2013-12-07 19:36:58.19700035.615 +/- 2.3-97.403 +/- 2.26.7 +/- 3.12.5 ml ogs2013-12-07 19:26:30.06200035.609 +/- 1.5-97.398 +/- 2.26.4 +/- 2.53.0 ml og

4.8 now? Heard it was upgraded.

4.8 now? Heard it was upgraded.

Two different measurement methods used.

I didn't feel it in Norman, though everyone west of SE 12th seemed to and most said it was fairly significant. No one I've talked to can figure out exactly why everyone east of 12th felt absolutely nothing.

It was felt at least as far north as Wichita: Small earthquake shakes OKC, felt in KS | Local News - Home (http://www.kwch.com/news/local-news/small-earthquake-shakes-okc-felt-in-ks/-/21054266/23372088/-/kt1i56/-/index.html)

I didn't feel it in Norman, though everyone west of SE 12th seemed to and most said it was fairly significant. No one I've talked to can figure out exactly why everyone east of 12th felt absolutely nothing.

Hey...I'm east of 12th and felt it just fine. :)

I didn't feel it in Norman, though everyone west of SE 12th seemed to and most said it was fairly significant. No one I've talked to can figure out exactly why everyone east of 12th felt absolutely nothing.

We are well west of SE 12th and the only way we knew about it here was because folks lit up my lovely's FB feed, and that prompted me to sign in here to look for more info. Which of course I found. We miss most of these events, including today. Not sure why.

Hey...I'm east of 12th and felt it just fine. :)

Gah. I refuse to believe it was just me who missed out on it. :(

If Obama would just stop supporting gay marriage, all these earthquakes would go away!

It shook my house pretty good for about 4 seconds and could hear it rumble like thunder on NW 42nd st west of Meridian.

Aftershock now showing as 2.8M, 4 mi. southeast of Edmond at 1:26pm.

19th and Telephone in Moore at the time and didn't feel a thing

It's been a busy day, I just went to the OGS site and found the following. Notice that the last two of these were yesterday even though they are listed as today since they record them by UTC.
C. T.
2013-12-07 20:45:16.963000 35.596 +/- 2.4 -97.371 +/- 4.5 4.4 +/- 5.6 2.0 ML OGS
2013-12-07 20:26:20.475999 35.401 +/- 4.0 -96.478 +/- 3.8 5.0 +/- 0.0 1.8 ML OGS
2013-12-07 19:36:58.197000 35.615 +/- 2.3 -97.403 +/- 2.2 6.7 +/- 3.1 2.5 ML OGS
2013-12-07 19:29:40.018000 35.606 +/- 1.5 -97.403 +/- 2.7 5.6 +/- 3.1 2.0 ML OGS
2013-12-07 19:26:30.062000 35.609 +/- 1.5 -97.398 +/- 2.2 6.4 +/- 2.5 3.0 ML OGS
2013-12-07 19:06:02.887999 35.612 +/- 2.9 -97.407 +/- 3.1 6.5 +/- 5.4 1.9 ML OGS
2013-12-07 18:36:46.686000 35.611 +/- 1.6 -97.396 +/- 2.2 6.1 +/- 2.6 2.5 ML OGS
2013-12-07 18:29:06.094000 35.610 +/- 3.3 -97.406 +/- 3.5 6.4 +/- 7.4 1.7 ML OGS
2013-12-07 18:10:24.606000 35.609 +/- 1.5 -97.386 +/- 2.1 6.4 +/- 2.2 4.8 ML OGS
2013-12-07 18:08:06.211999 35.609 +/- 1.8 -97.383 +/- 2.7 6.5 +/- 2.6 2.2 ML OGS
2013-12-07 05:27:19.411999 35.893 +/- 3.3 -97.281 +/- 3.5 5.0 +/- 0.0 1.9 ML OGS
2013-12-07 00:32:01.159999 35.602 +/- 3.4 -97.389 +/- 4.4 5.8 +/- 6.5 1.7 ML OGS

Near Lake Hefner here and felt and definitely felt it while watching Bedlam

SWMC ER....We were looking for a big guy running through the ER when the books started rattling off shelves and drinks were splashing...it lasted a while.

The big one has me almost imagining others, but I thought I felt one around 6:00 and sure enough, a 3.3 after shock.
C. T.

2013-12-07 23:58:18.653999 35.616 +/- 1.8 -97.394 +/- 2.1 6.7 +/- 2.3 3.3 ML OGS

A total of 13 aftershocks so far.

The big one has me almost imagining others, but I thought I felt one around 6:00 and sure enough, a 3.3 after shock.
C. T.

2013-12-07 23:58:18.653999 35.616 +/- 1.8 -97.394 +/- 2.1 6.7 +/- 2.3 3.3 ML OGS

felt that one here in S. Edmond too.

Felt it in Tulsa. It's the first one I've felt in Tulsa.

http://folkworm.ceri.memphis.edu/heli_current/WMOK_BHZ_US_00.current.gif

The quake at 12:10 appears to be one down to the NW of Fort Worth.

Just felt another one at 12:27am (6:27 UTC).

Probably less than 3.0 (but close). Brief, but definitely noticeable.

Total 17 aftershocks...

Origin Time (UTC)LatitudeLongitudeDepth (km)Magnitude2013-12-08 04:46:34.29800035.510 +/- 4.7-96.722 +/- 3.65.0 +/- 0.01.0 ML OGS2013-12-08 03:44:32.46800035.614 +/- 3.7-97.403 +/- 4.58.2 +/- 7.71.6 ML OGS2013-12-08 02:14:13.16999935.607 +/- 2.3-97.395 +/- 2.95.0 +/- 4.61.5 ML OGS2013-12-08 01:34:20.71099935.605 +/- 2.2-97.390 +/- 2.86.4 +/- 4.51.9 ML OGS2013-12-08 00:26:06.17100035.754 +/- 3.1-97.606 +/- 7.25.0 +/- 0.01.9 ML OGS2013-12-08 00:04:12.00999935.609 +/- 2.2-97.410 +/- 2.55.0 +/- 5.41.6 ML OGS2013-12-07 23:58:18.66900035.608 +/- 1.5-97.399 +/- 2.16.4 +/- 2.63.2 ML OGS2013-12-07 20:45:16.96300035.596 +/- 2.4-97.371 +/- 4.54.4 +/- 5.62.0 ML OGS2013-12-07 20:26:20.47599935.401 +/- 4.0-96.478 +/- 3.85.0 +/- 0.01.8 ML OGS2013-12-07 19:36:58.19700035.615 +/- 2.3-97.403 +/- 2.26.7 +/- 3.12.5 ML OGS2013-12-07 19:29:40.01800035.606 +/- 1.5-97.403 +/- 2.75.6 +/- 3.12.0 ML OGS2013-12-07 19:26:30.06200035.609 +/- 1.5-97.398 +/- 2.26.4 +/- 2.53.0 ML OGS2013-12-07 19:13:47.08599935.612 +/- 1.7-97.400 +/- 2.16.4 +/- 2.42.2 ML OGS2013-12-07 19:09:01.45300035.610 +/- 1.5-97.392 +/- 2.36.4 +/- 2.52.2 ML OGS2013-12-07 19:06:02.88799935.612 +/- 2.9-97.407 +/- 3.16.5 +/- 5.41.9 ML OGS2013-12-07 18:36:46.68600035.611 +/- 1.6-97.396 +/- 2.26.1 +/- 2.62.5 ML OGS2013-12-07 18:29:06.09400035.610 +/- 3.3-97.406 +/- 3.56.4 +/- 7.41.7 ML OGS2013-12-07 18:10:24.58899935.607 +/- 1.2-97.386 +/- 1.96.4 +/- 2.14.8 ML OGS

Never noticed any of these on my lil' corner of the prairie.
And, that's ok.

I wasn't dreaming last night, I had just quit watching tv at around midnight and turned over to go to sleep when the house shook. What was that, senility? I can accept that because obviously, it wasn't logged by OGS.
C. T.

Latest Swarm Of OK Earthquakes Could Be Tied To Lake Arcadia (http://www.news9.com/story/23899666/latest-swarm-of-ok-earthquakes-could-be-tied-to-lake-acardia)

David,
The USGS shows one at 12:00 (0600 UTC), see below. What am I missing? I didn't mention this in my earlier post, but I thought it was in the high 2 or low 3 range.
C. T.

3.1
8km N of Spencer, Oklahoma
2013-12-08 00:27:33 UTC-06:005.0 km
Total 17 aftershocks...

Origin Time (UTC)LatitudeLongitudeDepth (km)Magnitude2013-12-08 04:46:34.29800035.510 +/- 4.7-96.722 +/- 3.65.0 +/- 0.01.0 ML OGS2013-12-08 03:44:32.46800035.614 +/- 3.7-97.403 +/- 4.58.2 +/- 7.71.6 ML OGS2013-12-08 02:14:13.16999935.607 +/- 2.3-97.395 +/- 2.95.0 +/- 4.61.5 ML OGS2013-12-08 01:34:20.71099935.605 +/- 2.2-97.390 +/- 2.86.4 +/- 4.51.9 ML OGS2013-12-08 00:26:06.17100035.754 +/- 3.1-97.606 +/- 7.25.0 +/- 0.01.9 ML OGS2013-12-08 00:04:12.00999935.609 +/- 2.2-97.410 +/- 2.55.0 +/- 5.41.6 ML OGS2013-12-07 23:58:18.66900035.608 +/- 1.5-97.399 +/- 2.16.4 +/- 2.63.2 ML OGS2013-12-07 20:45:16.96300035.596 +/- 2.4-97.371 +/- 4.54.4 +/- 5.62.0 ML OGS2013-12-07 20:26:20.47599935.401 +/- 4.0-96.478 +/- 3.85.0 +/- 0.01.8 ML OGS2013-12-07 19:36:58.19700035.615 +/- 2.3-97.403 +/- 2.26.7 +/- 3.12.5 ML OGS2013-12-07 19:29:40.01800035.606 +/- 1.5-97.403 +/- 2.75.6 +/- 3.12.0 ML OGS2013-12-07 19:26:30.06200035.609 +/- 1.5-97.398 +/- 2.26.4 +/- 2.53.0 ML OGS2013-12-07 19:13:47.08599935.612 +/- 1.7-97.400 +/- 2.16.4 +/- 2.42.2 ML OGS2013-12-07 19:09:01.45300035.610 +/- 1.5-97.392 +/- 2.36.4 +/- 2.52.2 ML OGS2013-12-07 19:06:02.88799935.612 +/- 2.9-97.407 +/- 3.16.5 +/- 5.41.9 ML OGS2013-12-07 18:36:46.68600035.611 +/- 1.6-97.396 +/- 2.26.1 +/- 2.62.5 ML OGS2013-12-07 18:29:06.09400035.610 +/- 3.3-97.406 +/- 3.56.4 +/- 7.41.7 ML OGS2013-12-07 18:10:24.58899935.607 +/- 1.2-97.386 +/- 1.96.4 +/- 2.14.8 ML OGS

I just went to the OGS sight again and they show the one at midnight and 2 more.
C. T.


Origin Time (UTC) Latitude Longitude Depth (km) Magnitude
2013-12-08 10:03:56.860999 35.668 +/- 1.4 -97.122 +/- 1.8 5.0 +/- 0.0 2.2 ML OGS
2013-12-08 08:50:18.844999 35.369 +/- 4.7 -96.490 +/- 5.3 5.0 +/- 0.0 1.8 ML OGS
2013-12-08 06:27:32.982999 35.605 +/- 1.3 -97.397 +/- 1.7 6.2 +/- 2.0 3.3 ML OGS
2013-12-08 04:46:34.298000 35.510 +/- 4.7 -96.722 +/- 3.6 5.0 +/- 0.0 1.0 ML OGS
2013-12-08 03:44:32.468000 35.614 +/- 3.7 -97.403 +/- 4.5 8.2 +/- 7.7 1.6 ML OGS
2013-12-08 02:14:13.169999 35.607 +/- 2.3 -97.395 +/- 2.9 5.0 +/- 4.6 1.5 ML OGS
2013-12-08 01:34:20.710999 35.605 +/- 2.2 -97.390 +/- 2.8 6.4 +/- 4.5 1.9 ML OGS
2013-12-08 00:26:06.171000 35.754 +/- 3.1 -97.606 +/- 7.2 5.0 +/- 0.0 1.9 ML OGS
2013-12-08 00:04:12.009999 35.609 +/- 2.2 -97.410 +/- 2.5 5.0 +/- 5.4 1.6 ML OGS
2013-12-07 23:58:18.669000 35.608 +/- 1.5 -97.399 +/- 2.1 6.4 +/- 2.6 3.2 ML OGS
2013-12-07 20:45:16.963000 35.596 +/- 2.4 -97.371 +/- 4.5 4.4 +/- 5.6 2.0 ML OGS
2013-12-07 20:26:20.475999 35.401 +/- 4.0 -96.478 +/- 3.8 5.0 +/- 0.0 1.8 ML OGS
2013-12-07 19:36:58.197000 35.615 +/- 2.3 -97.403 +/- 2.2 6.7 +/- 3.1 2.5 ML OGS
2013-12-07 19:29:40.018000 35.606 +/- 1.5 -97.403 +/- 2.7 5.6 +/- 3.1 2.0 ML OGS
2013-12-07 19:26:30.062000 35.609 +/- 1.5 -97.398 +/- 2.2 6.4 +/- 2.5 3.0 ML OGS
2013-12-07 19:13:47.085999 35.612 +/- 1.7 -97.400 +/- 2.1 6.4 +/- 2.4 2.2 ML OGS
2013-12-07 19:09:01.453000 35.610 +/- 1.5 -97.392 +/- 2.3 6.4 +/- 2.5 2.2 ML OGS
2013-12-07 19:06:02.887999 35.612 +/- 2.9 -97.407 +/- 3.1 6.5 +/- 5.4 1.9 ML OGS
2013-12-07 18:36:46.686000 35.611 +/- 1.6 -97.396 +/- 2.2 6.1 +/- 2.6 2.5 ML OGS
2013-12-07 18:29:06.094000 35.610 +/- 3.3 -97.406 +/- 3.5 6.4 +/- 7.4 1.7 ML OGS
2013-12-07 18:10:24.588999 35.607 +/- 1.2 -97.386 +/- 1.9 6.4 +/- 2.1 4.8 ML OGS

Latest Swarm Of OK Earthquakes Could Be Tied To Lake Arcadia (http://www.news9.com/story/23899666/latest-swarm-of-ok-earthquakes-could-be-tied-to-lake-acardia)

Obviously this can't be the cause and here's why: The colder it gets, the closer the water gets to turning to ice. Ice is obviously lighter than water (put an ice cube in a glass of water and watch it float.) Ergo, the water is lighter than it is in the summer so Lake Arcadia, itself, can't possibly be the cause of the most recent spate of earthquakes and aftershocks. Science Rules, Mythology Drools.

Anyone up for doing some random dunking of people and ducks out in that area to make sure no witches are behind this?

If you haven't read the comments on the News 9 story they are priceless.

And that article is a month old in case someone missed it.

If you haven't read the comments on the News 9 story they are priceless.

I read them. They were.

Another theory is that the Lake is covering an ancient Indian burial ground and the spirits are restless.
Not Native American Indians, but Sub-Continental Indians who were on a mysterious mission to the New World.

RM,
Right! I don't know how to copy a Youtube clip, so here's a link. Bill Cosby - Noah - YouTube (http://www.youtube.com/watch?v=bputeFGXEjA). I wish I could get just the one word (Right) clipped for this post.
C. T.


Obviously this can't be the cause and here's why: The colder it gets, the closer the water gets to turning to ice. Ice is obviously lighter than water (put an ice cube in a glass of water and watch it float.) Ergo, the water is lighter than it is in the summer so Lake Arcadia, itself, can't possibly be the cause of the most recent spate of earthquakes and aftershocks. Science Rules, Mythology Drools.

Anyone up for doing some random dunking of people and ducks out in that area to make sure no witches are behind this?

Obviously this can't be the cause and here's why: The colder it gets, the closer the water gets to turning to ice. Ice is obviously lighter than water (put an ice cube in a glass of water and watch it float.) Ergo, the water is lighter than it is in the summer so Lake Arcadia, itself, can't possibly be the cause of the most recent spate of earthquakes and aftershocks. Science Rules, Mythology Drools.

Anyone up for doing some random dunking of people and ducks out in that area to make sure no witches are behind this?

Are you kidding me? Ice is lighter?

Are you kidding me? Ice is lighter?

Lighter . . . Less Dense . . . Whatever . . .
In any case, not the cause of the recent spate of earthquakes.
(now . . . if it were a spurt of earthquakes . . . on the other hand)

Are you kidding me? Ice is lighter?

Ice is less dense than water, so for a given volume of ice or water, the ice will have less mass.

No kidding.

A lake that freezes loses no mass.


Ice is less dense than water, so for a given volume of ice or water, the ice will have less mass.

Yeah, you're joking about a frozen lake being somehow lighter than the same lake, fully thawed?

This is pretty basic stuff. Ice is less dense than water typically unless you are able to ensure there is no trapped air in the ice. How often does that happen? Now, you aren't going to lose water itself as it freezes, it is just going to expand and spread out.

We could probably assume that as a lake freezes, it is spreading the weight out over a greater area. As far as the lake having any impact on the earthquakes, who knows.

Three more, all within less than 4 minutes.
C. T.

Origin Time (UTC) Latitude Longitude Depth (km) Magnitude
2013-12-08 16:11:46.186999 35.562 +/- 2.3 -96.765 +/- 2.8 1.9 +/- 2.5 2.2 ML OGS
2013-12-08 16:09:50.625000 35.535 +/- 5.3 -96.750 +/- 6.8 8.0 +/- 15.2 1.9 ML OGS
2013-12-08 16:08:15.944000 35.559 +/- 2.0 -96.754 +/- 2.1 5.0 +/- 0.0 2.6 ML OGS