Oklahoma Earthquake Activity

[venture]

From OGS:

Nine Earthquakes recorded in Canadian County: Several felt in Niles & Minco OK. 3/11/10 LATEST OKLAHOMA EARTHQUAKES!

The six largest earthquakes locations are very well constrained and on relocation we expect the magnitude 2.1 earthquake to centered with the cluster. The cluster of six earthquakes is 7 miles west of Union City Oklahoma in Canadian County near the border with both Grady and Caddo Counties. The cluster is about 11 miles SSW of El Reno.

2010 MAR 11 07:41:31 CANADIAN 2.1 35.277N 98.019W 2.7km

2010 MAR 11 08:11:01 CANADIAN F 3.0 35.378N 98.046W 5.0km

2010 MAR 11 09:45:19 CANADIAN F 2.8 35.398N 98.072W 2.3km

2010 MAR 11 10:00:56 CANADIAN F 2.7 35.4 98.1 5.0km

2010 MAR 11 10:06:10 CANADIAN F 2.7 35.384N 98.069W 2.5km

2010 MAR 11 10:54:25 CANADIAN F 3.0 35.401N 98.062W 5.0km

2010 MAR 11 13:15:17 CANADIAN F 2.9 35.388N 98.078W 3.2km

[venture]

I got most of the earthquakes mapped out: Oklahoma Earthquakes 2010 - Google Maps

Two small earthquakes didn't have an official location on them, so they are on the map with a dot in the marker. Also the one near Minco may have its location adjusted further north after they did done reviewing all data.

[Thunder]

Are you saying all those was today?

[venture]

Are you saying all those was today?

Yes they were all today.

[Thunder]

Well, I slept thru all of that. LOL!

We just had another one.

== PRELIMINARY EARTHQUAKE REPORT ==



Region: OKLAHOMA
Geographic coordinates: 35.465N, 98.106W
Magnitude: 3.4 M
Depth: 4 km
Universal Time (UTC): 11 Mar 2010 23:57:29
Time near the Epicenter: 11 Mar 2010 17:57:29
Local standard time in your area: 11 Mar 2010 23:57:29

Location with respect to nearby cities:
15 km (10 miles) WSW (242 degrees) of El Reno, OK
15 km (9 miles) S (175 degrees) of Calumet, OK
19 km (12 miles) WNW (288 degrees) of Union City, OK
52 km (32 miles) W (268 degrees) of Oklahoma City, OK
320 km (199 miles) NNW (338 degrees) of Dallas, TX

[venture]

[venture]

Magnitude
3.1
Date-Time
Saturday, March 13, 2010 at 09:02:44 UTC
Saturday, March 13, 2010 at 03:02:44 AM at epicenter
Time of Earthquake in other Time Zones
Location
35.398°N, 98.069°W
Depth
5 km (3.1 miles) set by location program
Region
OKLAHOMA
Distances
14 km (9 miles) NW (310°) from Minco, OK
14 km (9 miles) W (263°) from Union City, OK
18 km (11 miles) SW (215°) from El Reno, OK
49 km (31 miles) W (259°) from Oklahoma City, OK
312 km (194 miles) NNW (338°) from Dallas, TX
Location Uncertainty
horizontal +/- 9.1 km (5.7 miles); depth fixed by location program
Parameters
NST= 12, Nph= 12, Dmin=32.4 km, Rmss=1.15 sec, Gp=115°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=7

[Thunder]

The quakes is starting to be all over the states!!!

[venture]

The quakes is starting to be all over the states!!!

They are just starting to show up in other areas where they should be. The image below only goes through 2001, but it clearly shows this latest swarm is in an area that normally seems this activity.



Also...there were 4 more quakes yesterday that the USGS did not register, but are on the OGS site.

2010 MAR 12 05:17:57 CANADIAN 1.7 35.53N 97.381W 0km

2010 MAR 12 07:23:11 CANADIAN 2.3 35.547N 96.756W 0km

2010 MAR 12 07:56:00 CANADIAN 2.7 35.658N 97.222W 4.5km

2010 MAR 12 14:59:57 CANADIAN F 2.2 35.416N 98.096W 5.5km

[venture]

Working on the map a bit more today. There were some missing that OGS had in their catalog that USGS didn't pick up on - back a couple months that is. Fixed some strength changes as well, but definitely quite a few on the map so far with these swarms. Data is likely to change as they'll revisit readings and such. OGS mentioned up to 10 earthquakes a couple days back, but only put 8 in their database. The weaker tremors were around M1.0 give or take. I included them on the map, but they aren't in the official catalog right now.

Totals so far:
January - 7 Total (M4.0+: 1, M3.0+: 4, M2.0+: 2)
February - 9 Total (M4.0+: 1, M3.0+: 2, M2.0+: 6)
March (through this post) - 21 Total (M3.0+: 6, M2.0+: 9, M1.0+: 6)

Again, map is at: Oklahoma Earthquakes 2010 - Google Maps

Also have a page on AC.com that is a bit more organized: Earthquake Information - AnvilCrawlers

[Thunder]

Nice map and info. :-)

[venture]

Magnitude
2.4
Date-Time
Friday, March 19, 2010 at 22:07:27 UTC
Friday, March 19, 2010 at 05:07:27 PM at epicenter
Time of Earthquake in other Time Zones
Location
35.554°N, 97.473°W
Depth
10 km (6.2 miles) set by location program
Region
OKLAHOMA CITY URBAN AREA, OKLAHOMA
Distances
3 km (2 miles) NW (318°) from Lake Aluma, OK
6 km (3 miles) NNW (340°) from Forest Park, OK
6 km (4 miles) E (82°) from Nichols Hills, OK
10 km (6 miles) NE (35°) from Oklahoma City, OK
313 km (194 miles) N (349°) from Dallas, TX
Location Uncertainty
horizontal +/- 10.7 km (6.6 miles); depth fixed by location program
Parameters
NST= 7, Nph= 7, Dmin=31.4 km, Rmss=1.01 sec, Gp=112°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=8

[mugofbeer]

They're creeeeeeeeping closer, and closer, and ........

[possumfritter]

Venture,

I am curious...are the bordering states experiencing as much earthquake activity as well?

[venture]

Arkansas over to SE Missouri have more activity than we do typically. All due to the New Madrid fault there. We have been active, not as much as they have though. Texas rarely has much activity, same with KS and CO.

[possumfritter]

Thank ya Venture

[venture]

Magnitude
3.8
Date-Time
Monday, March 22, 2010 at 02:37:18 UTC
Sunday, March 21, 2010 at 09:37:18 PM at epicenter
Time of Earthquake in other Time Zones
Location
35.542°N, 96.737°W
Depth
5 km (3.1 miles) set by location program
Region
OKLAHOMA
Distances
8 km (5 miles) NW (324°) from Prague, OK
11 km (7 miles) SE (135°) from Sparks, OK
15 km (10 miles) ENE (71°) from Meeker, OK
28 km (18 miles) NE (39°) from Shawnee, OK
73 km (45 miles) E (85°) from Oklahoma City, OK
305 km (190 miles) N (1°) from Dallas, TX
Location Uncertainty
horizontal +/- 4.9 km (3.0 miles); depth fixed by location program
Parameters
NST= 38, Nph= 38, Dmin=41.7 km, Rmss=0.96 sec, Gp= 61°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=7
Source
USGS NEIC (WDCS-D)

[venture]

Two more today.

Magnitude
2.7
Date-Time
Monday, March 22, 2010 at 08:20:04 UTC
Monday, March 22, 2010 at 03:20:04 AM at epicenter
Time of Earthquake in other Time Zones
Location
35.558°N, 96.822°W
Depth
5 km (3.1 miles) set by location program
Region
OKLAHOMA
Distances
6 km (4 miles) S (182°) from Sparks, OK
10 km (6 miles) NE (45°) from Meeker, OK
15 km (9 miles) WNW (303°) from Prague, OK
26 km (16 miles) NNE (23°) from Shawnee, OK
65 km (40 miles) E (82°) from Oklahoma City, OK
307 km (191 miles) N (359°) from Dallas, TX
Location Uncertainty
horizontal +/- 7.9 km (4.9 miles); depth fixed by location program
Parameters
NST= 13, Nph= 13, Dmin=70.1 km, Rmss=1.04 sec, Gp= 79°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=6
Source
USGS NEIC (WDCS-D)



Magnitude
2.8
Date-Time
Monday, March 22, 2010 at 09:18:51 UTC
Monday, March 22, 2010 at 04:18:51 AM at epicenter
Time of Earthquake in other Time Zones
Location
35.590°N, 96.775°W
Depth
5 km (3.1 miles) set by location program
Region
OKLAHOMA
Distances
5 km (3 miles) ESE (118°) from Sparks, OK
13 km (8 miles) S (184°) from Davenport, OK
14 km (9 miles) NW (326°) from Prague, OK
31 km (19 miles) NNE (27°) from Shawnee, OK
70 km (43 miles) E (80°) from Oklahoma City, OK
310 km (193 miles) N (0°) from Dallas, TX
Location Uncertainty
horizontal +/- 5.8 km (3.6 miles); depth fixed by location program
Parameters
NST= 16, Nph= 16, Dmin=72.5 km, Rmss=0.68 sec, Gp= 79°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=7

[Thunder]

There are a couple more today as well and some of those was classified as aftershocks.

[venture]

Yeah...its frustrating at times with USGS doesn't pick up on them, but at least OGS is putting together a much better website for this.

Helicorder recording from OGS with the latest quakes.

http://www.okgeosurvey1.gov/media/eq...10V35Aheli.png

[Thunder]

I feel the same way with USGS. They've been slacking severely, even to the point of not finalizing sum quakes.

[venture]

This is going to be a big confusing...but all the quakes with the recent event:

ear Date HRMM Sec Error Latitud Error Longitud Error Depth Error AGA NST RMS GAP Mc Mb Mw County

2010 322 128 54.1 0.43 35.888 2.4 -96.804 2.2 0 11 OGS 7 0.5 105 1.9 OGS
2010 322 237 18.6 1.47 35.512 6 -96.751 5.4 15.2 9.4 OGS 23 1.3 159 3.2 OGS 3.8 US
2010 322 636 28.6 2.52 35.495 17.3 -97.071 18.1 31.9 29.2 OGS 10 2.7 147 2.5 OGS
2010 322 650 29.8 0.49 36.091 2 -97.459 3.1 5.2 5.7 OGS 12 0.6 56 2.6 OGS
2010 322 743 49.8 0.43 36.087 1.5 -97.472 2.7 8.2 4 OGS 8 0.4 64 2.5 OGS
2010 322 820 4.4 0.63 35.529 3 -96.764 3.5 5 4.6 OGS 15 0.7 143 2.6 OGS 2.7 US
2010 322 827 42 0.43 35.535 3.1 -96.752 3.4 0 10.9 OGS 8 0.5 160 2.2 OGS
2010 322 918 51.4 0.57 35.542 2.6 -96.735 3.9 5 5.3 OGS 13 0.6 143 2.9 OGS 2.8 US
2010 322 1004 27.4 0.6 35.545 3.4 -96.749 3.8 5 7.6 OGS 12 0.6 142 2.5 OGS
2010 322 1227 50.6 0.42 35.535 3 -96.744 4.6 0 11.8 OGS 7 0.5 160 1.7 OGS

[venture]

Updated the Google Map with everything: Oklahoma Earthquakes 2010 - Google Maps

It is pretty interesting that a couple of the quakes/aftershocks occurred as far north as Mulhall. That would put them pretty close to the Nemaha Fault area which really hasn't been all that active - at least that area. For all we know all these faults are connected so it is essentially the same system.

One thing that is interesting is the amount of activity all the new recording devices are able to pick up on. It makes you wonder how much has been missed in the past.

Here is a screenshot I took from Google Earth showing all the marks. I really don't like the text over everything, but oh well.

Scale is...Light Blue - M1.9 or less, Dark Blue - M2.0 to 2.9, Green - M3.0 to 3.9, and Yellow is 4.0 to 4.9.
The colored lines are the major faults that I added to the map...well the ones that I could find a reference map. Currently nothing exists for the ones where the majority of quakes are occurring.

[SkyWestOKC]

I am not a big tracker of earthquakes and stuff. I have a quick question: magnitudes are based on exponents instead of relatively, correct? For example, a magnitude 3 quake is a 1.0 magnitude x 10^3 correct?

It is not based on a mag 3 being just 3 times larger? Is this correct?

[venture]

Magnitude
2.3
Date-Time
Saturday, April 03, 2010 at 13:34:17 UTC
Saturday, April 03, 2010 at 08:34:17 AM at epicenter
Time of Earthquake in other Time Zones
Location
35.504°N, 97.233°W
Depth
5 km (3.1 miles) set by location program
Region
OKLAHOMA
Distances
4 km (2 miles) NE (52°) from Choctaw, OK
5 km (3 miles) NW (305°) from Harrah, OK
9 km (5 miles) SE (142°) from Jones, OK
27 km (17 miles) E (85°) from Oklahoma City, OK
304 km (189 miles) N (352°) from Dallas, TX
Location Uncertainty
horizontal +/- 7.7 km (4.8 miles); depth fixed by location program
Parameters
NST= 8, Nph= 8, Dmin=44.9 km, Rmss=0.45 sec, Gp=108°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=6
Source
USGS NEIC (WDCS-D)



Magnitude
2.2
Date-Time
Saturday, April 03, 2010 at 13:52:16 UTC
Saturday, April 03, 2010 at 08:52:16 AM at epicenter
Time of Earthquake in other Time Zones
Location
35.500°N, 97.119°W
Depth
5 km (3.1 miles) set by location program
Region
OKLAHOMA
Distances
6 km (4 miles) ENE (66°) from Harrah, OK
10 km (6 miles) N (349°) from McLoud, OK
14 km (8 miles) E (82°) from Choctaw, OK
24 km (15 miles) NW (316°) from Shawnee, OK
38 km (23 miles) E (87°) from Oklahoma City, OK
302 km (188 miles) N (354°) from Dallas, TX
Location Uncertainty
horizontal +/- 7.2 km (4.5 miles); depth fixed by location program
Parameters
NST= 9, Nph= 9, Dmin=51.8 km, Rmss=0.56 sec, Gp= 86°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=6
Source
USGS NEIC (WDCS-D)
Event ID
us2010uqat