National / World News 7:01 p.m. Sunday, November 6, 2011
Big quake follows increase in Oklahoma rumblings
By JUSTIN JUOZAPAVICIUS
The Associated Press
SPARKS, Okla. — Clouds of dust belched from the corners of almost every room in Joe Reneau's house as the biggest earthquake in Oklahoma history rocked the two-story building.
A roar that sounded like a jumbo jet filled the air, and Reneau's red-brick chimney collapsed and fell into the roof above the living room. By the time the shaking stopped, a pantry worth of food had been strewn across the kitchen and shards of glass and pottery covered the floor.
"It was like WHAM!" said Reneau, 75, gesturing with swipes of his arms. "I thought in my mind the house would stand, but then again, maybe not."
The magnitude 5.6 earthquake and its aftershocks still had residents rattled Sunday.
Two minor injuries were reported from Saturday's quakes by the Oklahoma Department of Emergency Management, which said neither person was hospitalized. And, aside from a buckled highway and the collapse of a tower on the St. Gregory's University administration building in Shawnee, no major damage was reported.
But the weekend earthquakes were among the strongest yet in a state that has seen a dramatic, unexplained increase in seismic activity.
Oklahoma typically had about 50 earthquakes a year until 2009. Then the number spiked, and 1,047 quakes shook the state last year, prompting researchers to install seismographs in the area. Still, most of the earthquakes have been small.
Saturday night's big one jolted Oklahoma State University's stadium shortly after the No. 3 Cowboys defeated No. 17 Kansas State. Fans were still leaving the game.
"That shook up the place, had a lot of people nervous," Oklahoma State wide receiver Justin Blackmon said.
The temblor sent Jesse Richards' wife running outside because she thought their home was going to collapse. The earthquake centered near their home in Sparks, 44 miles northeast of Oklahoma City, could be felt throughout the state and in Arkansas, Kansas, Missouri, northern Texas and some parts of Illinois and Wisconsin.
Richards estimated it lasted for as much as a minute. One of his wife's cookie jars fell on the floor and shattered, and pictures hanging in their living room were knocked askew.
"We've been here 18 years, and it's getting to be a regular occurrence," said Richards, 50. But, he added, "I hope I never get used to them."
Geologists now believe a magnitude 4.7 earthquake Saturday morning was a foreshock to the bigger one that followed that night. They recorded at least 10 aftershocks by midmorning Sunday and expected more. Two of the aftershocks, at 4 a.m. and 9 a.m., were big, magnitude 4.0.
"We will definitely continue to see aftershocks, as we've already seen aftershocks from this one," said Paul Earle, a seismologist with the U.S. Geological Survey in Golden, Colo. "We will see aftershocks in the days and weeks to come, possibly even months."
Brad Collins, the spokesman for St. Gregory's University in Shawnee, said one of the four towers on its "castle-looking" administration building collapsed in the big earthquake and the other three towers were damaged. He estimated the towers were about 25 feet tall.
"We definitely felt it," Collins said. "I was at home, getting ready for bed and it felt like the house was going to collapse. I tried to get back to my kids' room and it was tough to keep my balance, I could hardly walk."
Scientists are puzzled by the recent seismic activity. It appeared the latest quake occurred on the Wilzetta fault, but researchers may never know for sure. Earthquakes that hit east of the Rocky Mountains are harder to pinpoint because the fault systems are not as well studied as major faults like the San Andreas in California.
Arkansas also has seen a big increase in earthquake activity, which residents have blamed on injection wells. Natural gas companies engaged in hydraulic fracturing, or fracking, use fluid to break apart shale and rock to release natural gas. Injection wells then dispose of the fluid by injecting it back into the ground.
There are 181 injection wells in the Oklahoma county where most of the weekend earthquakes happened, said Matt Skinner, spokesman for the Oklahoma Corporation Commission, which oversees oil and gas production in the state and intrastate transportation pipelines.
But natural gas companies claim there is no proof of a connection between injection wells and earthquakes, and a study released earlier this year by an Oklahoma Geological Survey seismologist seems to back that up. It found most of the state's seismic activity didn't appear to be tied to the wells, although more investigation was needed.
"It's a real mystery," seismologist Austin Holland of the Oklahoma Geological Survey said of the recent shaking.
"At this point, there's no reason to think that the earthquakes would be caused by anything other than natural" shifts in the Earth's crust, Holland said.
Earle said he couldn't comment on the relationship between fracking, injection wells and earthquakes.
Most Oklahoma residents still see earthquakes as anomalies in a state more often damaged by tornadoes. Roger Baker, 52, laughed at the idea of buying earthquake insurance, although the weekend quakes left a 6-foot-long crack several inches deep his yard in Sparks.
"It's just a part of life," he said.
Prague resident Mark Treat, 52, was at the Dollar General store Sunday, buying paper towels in bulk, garbage bins and a broom and mop to begin cleaning up his home. He said the quake hit hard enough to knock dishes, lamps and a TV to the ground and overturn a chest of drawers.
"It busted up a lot of stuff," Treat said. "I can't believe is only was a 5.6."
___
Associated Press writer Ken Miller in Oklahoma City and AP science writer Alicia Chang in Los Angeles contributed to this report.
Massive number of earthquakes in Oklahoma.
by TXsharon on November 5, 2011
in earthquakes
UPDATE: I had to change the title of this post because we are way past six earthquakes now.
My inbox overfloweth with earthquake notices from Oklahoma last night.
Some of the notices may be duplicates of the same event. I’m not sure.
Magnitude 4.7 - OKLAHOMA
2011 November 05 07:12:45 UTC
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Summary
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Scientific & Technical
Earthquake Details
This event has been reviewed by a seismologist.
4.7M EVENT PAGE
Magnitude / 4.7Date-Time / Saturday, November 05, 2011 at 07:12:45 UTC
Saturday, November 05, 2011 at 02:12:45 AM at epicenter
Time of Earthquake in other Time Zones
Location / 35.553°N, 96.748°W
Depth / 4 km (2.5 miles)
Region / OKLAHOMA
Distances / 33 km (20 miles) NE of Shawnee, Oklahoma
67 km (41 miles) W of Okmulgee, Oklahoma
68 km (42 miles) SSE of Stillwater, Oklahoma
75 km (46 miles) E of OKLAHOMA CITY, Oklahoma
Location Uncertainty / horizontal +/- 11.8 km (7.3 miles); depth +/- 2.8 km (1.7 miles)
Parameters / NST=148, Nph=151, Dmin=24.5 km, Rmss=0.85 sec, Gp= 25°,
M-type=body wave magnitude (Mb), Version=C
Source / Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID / usb0006k8b
3.4M Event Page
Magnitude 3.4 - OKLAHOMA
2011 November 05 07:27:20 UTC
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Earthquake Details
This event has been reviewed by a seismologist.
Magnitude / 3.4Date-Time / Saturday, November 05, 2011 at 07:27:20 UTC
Saturday, November 05, 2011 at 02:27:20 AM at epicenter
Time of Earthquake in other Time Zones
Location / 35.566°N, 96.698°W
Depth / 5 km (3.1 miles) (poorly constrained)
Region / OKLAHOMA
Distances / 33 km (20 miles) NE of Shawnee, Oklahoma
67 km (41 miles) W of Okmulgee, Oklahoma
68 km (42 miles) SSE of Stillwater, Oklahoma
75 km (46 miles) E of OKLAHOMA CITY, Oklahoma
Location Uncertainty / horizontal +/- 11.7 km (7.3 miles); depth +/- 9.4 km (5.8 miles)
Parameters / Nph= 0, Dmin=0 km, Rmss=1.23 sec, Gp= 0,
M-type="Nuttli" surface wave magnitude (mbLg), Version=4
Source / Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID / usb0006k9x
2.7M Event Page
Magnitude 2.7 - OKLAHOMA
2011 November 05 07:44:34 UTC
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Details
Summary
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Scientific & Technical
Earthquake Details
This event has been reviewed by a seismologist.
Magnitude / 2.7Date-Time / Saturday, November 05, 2011 at 07:44:34 UTC
Saturday, November 05, 2011 at 02:44:34 AM at epicenter
Time of Earthquake in other Time Zones
Location / 35.488°N, 96.755°W
Depth / 5 km (3.1 miles)
Region / OKLAHOMA
Distances / 24 km (14 miles) NE of Shawnee, Oklahoma
69 km (42 miles) ENE of Norman, Oklahoma
70 km (43 miles) E of OKLAHOMA CITY, Oklahoma
73 km (45 miles) W of Okmulgee, Oklahoma
Location Uncertainty / horizontal +/- 14.9 km (9.3 miles); depth +/- 3.1 km (1.9 miles)
Parameters / NST= 12, Nph= 20, Dmin=99.1 km, Rmss=0.99 sec, Gp=115°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=3
Source / Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID / usb0006kat
3.3M Event Page (same event number as the 2.7M event above)
Magnitude 3.3 - OKLAHOMA
2011 November 05 09:12:11 UTC
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Details
Summary
Maps
Scientific & Technical
Earthquake Details
This event has been reviewed by a seismologist.
Magnitude / 3.3Date-Time / Saturday, November 05, 2011 at 09:12:11 UTC
Saturday, November 05, 2011 at 04:12:11 AM at epicenter
Time of Earthquake in other Time Zones
Location / 35.591°N, 96.788°W
Depth / 4.9 km (3.0 miles)
Region / OKLAHOMA
Distances / 31 km (19 miles) NNE of Shawnee, Oklahoma
63 km (39 miles) SSE of Stillwater, Oklahoma
65 km (40 miles) ESE of Guthrie, Oklahoma
67 km (41 miles) ENE of OKLAHOMA CITY, Oklahoma
Location Uncertainty / horizontal +/- 13.8 km (8.6 miles); depth +/- 3.1 km (1.9 miles)
Parameters / NST= 26, Nph= 29, Dmin=96.8 km, Rmss=0.57 sec, Gp= 58°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=6
Source / Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID / usb0006kbv
3.3M Event Page
Magnitude 3.3 - OKLAHOMA
2011 November 05 11:24:15 UTC
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Details
Summary
Maps
Scientific & Technical
Earthquake Details
This event has been reviewed by a seismologist.
Magnitude / 3.3Date-Time / Saturday, November 05, 2011 at 11:24:15 UTC
Saturday, November 05, 2011 at 06:24:15 AM at epicenter
Time of Earthquake in other Time Zones
Location / 35.521°N, 96.778°W
Depth / 5 km (3.1 miles)
Region / OKLAHOMA
Distances / 25 km (15 miles) NNE of Shawnee, Oklahoma
67 km (41 miles) E of OKLAHOMA CITY, Oklahoma
68 km (42 miles) ENE of Norman, Oklahoma
70 km (43 miles) SE of Guthrie, Oklahoma
Location Uncertainty / horizontal +/- 12.6 km (7.8 miles); depth +/- 3.1 km (1.9 miles)
Parameters / NST= 26, Nph= 34, Dmin=99.1 km, Rmss=0.69 sec, Gp= 58°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=7
Source / Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID / usb0006kcn
3.3M Event Page
Magnitude 3.4 - OKLAHOMA
2011 November 05 13:42:26 UTC
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Details
Summary
Maps
Scientific & Technical
Earthquake Details
This event has been reviewed by a seismologist.
Magnitude / 3.4Date-Time / Saturday, November 05, 2011 at 13:42:26 UTC
Saturday, November 05, 2011 at 08:42:26 AM at epicenter
Time of Earthquake in other Time Zones
Location / 35.530°N, 96.766°W
Depth / 5 km (3.1 miles) (poorly constrained)
Region / OKLAHOMA
Distances / 26 km (16 miles) NNE of Shawnee, Oklahoma
68 km (42 miles) E of OKLAHOMA CITY, Oklahoma
69 km (42 miles) ENE of Norman, Oklahoma
70 km (43 miles) SSE of Stillwater, Oklahoma
Location Uncertainty / horizontal +/- 15.7 km (9.8 miles); depth +/- 10.8 km (6.7 miles)
Parameters / Nph= 0, Dmin=0 km, Rmss=1.6 sec, Gp= 0,
M-type="Nuttli" surface wave magnitude (mbLg), Version=D
Source / Magnitude: USGS NEIC (WDCS-D)
Location: Oklahoma Geological Survey, Leonard, USA
Event ID / usb0006kdk
Wow! Oklahomans, hang in there!
Recently the Oklahoma Geological Survey found that fracking may have caused some of the earthquakes.
Earthquakes are caused by hydraulic fracturing
by TXsharon on November 2, 2011
in earthquakes
If you have been following my blog posts about how earthquakes follow fracking around, this is not news to you. To all the rest…
Oklahoma’s quakes have notnow been blamed on fracking and so have the quakes in UK.
Here is the report: Examination of Possibly Induced Seismicity from Hydraulic Fracturing in the Eola Field, Garvin County, Oklahoma (see PDF file induced_seismic_dueto_frackingOF1_2011.pdf
UPDATE: This just in…
3.6M Event Page
Magnitude 3.6 - OKLAHOMA
2011 November 05 14:36:30 UTC
Earthquake Details
This event has been reviewed by a seismologist.
Magnitude / 3.6Date-Time / Saturday, November 05, 2011 at 14:36:30 UTC
Saturday, November 05, 2011 at 09:36:30 AM at epicenter
Time of Earthquake in other Time Zones
Location / 35.584°N, 96.789°W
Depth / 4.9 km (3.0 miles)
Region / OKLAHOMA
Distances / 30 km (18 miles) NNE of Shawnee, Oklahoma
64 km (39 miles) SSE of Stillwater, Oklahoma
66 km (41 miles) ESE of Guthrie, Oklahoma
67 km (41 miles) E of OKLAHOMA CITY, Oklahoma
Location Uncertainty / horizontal +/- 13.6 km (8.5 miles); depth +/- 3.1 km (1.9 miles)
Parameters / NST= 25, Nph= 26, Dmin=96.8 km, Rmss=0.75 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 / usb0006kdy
UPDATE: From the comments…
5.6M Event Page – we felt this one here north of Dallas and someone in Decatur reported feeling their house shake. It was even felt in Grand Prairie.
Magnitude 5.6 - OKLAHOMA
2011 November 06 03:53:10 UTC
Earthquake Details
This event has been reviewed by a seismologist.
Magnitude / 5.6Date-Time / Sunday, November 06, 2011 at 03:53:10 UTC
Saturday, November 05, 2011 at 10:53:10 PM at epicenter
Time of Earthquake in other Time Zones
Location / 35.537°N, 96.747°W
Depth / 5 km (3.1 miles)
Region / OKLAHOMA
Distances / 34 km (21 miles) NNE of Shawnee, Oklahoma
63 km (39 miles) SSE of Stillwater, Oklahoma
68 km (42 miles) ESE of Guthrie, Oklahoma
71 km (44 miles) ENE of OKLAHOMA CITY, Oklahoma
Location Uncertainty / horizontal +/- 10.5 km (6.5 miles); depth +/- 2.8 km (1.7 miles)
Parameters / NST=189, Nph=192, Dmin=26.7 km, Rmss=1.06 sec, Gp= 29°,
M-type=centroid moment magnitude (Mw), Version=C
Source / Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID / usb0006klz
UPDATE: And another one…
3.6M Event Page
Magnitude 3.6 - OKLAHOMA
2011 November 06 04:03:41 UTC
Earthquake Details
This event has been reviewed by a seismologist.
Magnitude / 3.6Date-Time / Sunday, November 06, 2011 at 04:03:41 UTC
Saturday, November 05, 2011 at 11:03:41 PM at epicenter
Time of Earthquake in other Time Zones
Location / 35.554°N, 96.760°W
Depth / 5 km (3.1 miles)
Region / OKLAHOMA
Distances / 28 km (17 miles) NNE of Shawnee, Oklahoma
68 km (42 miles) SSE of Stillwater, Oklahoma
69 km (42 miles) E of OKLAHOMA CITY, Oklahoma
70 km (43 miles) ESE of Guthrie, Oklahoma
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)
3.0M Event Page
Magnitude 3.0 - OKLAHOMA
2011 November 06 04:54:00 UTC
Earthquake Details
This event has been reviewed by a seismologist.
Magnitude / 3.0Date-Time / Sunday, November 06, 2011 at 04:54:00 UTC
Saturday, November 05, 2011 at 11:54:00 PM at epicenter
Time of Earthquake in other Time Zones
Location / 35.540°N, 96.687°W
Depth / 5 km (3.1 miles)
Region / OKLAHOMA
Distances / 31 km (19 miles) NE of Shawnee, Oklahoma
66 km (41 miles) W of Okmulgee, Oklahoma
72 km (44 miles) SSE of Stillwater, Oklahoma
75 km (46 miles) E of OKLAHOMA CITY, Oklahoma
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)
3.8 Event Page
Magnitude 3.8 - OKLAHOMA
2011 November 06 06:31:10 UTC
Earthquake Details
This event has been reviewed by a seismologist.
Magnitude / 3.8Date-Time / Sunday, November 06, 2011 at 06:31:10 UTC
Sunday, November 06, 2011 at 01:31:10 AM at epicenter
Time of Earthquake in other Time Zones
Location / 35.559°N, 96.874°W
Depth / 5 km (3.1 miles)
Region / OKLAHOMA
Distances / 26 km (16 miles) N of Shawnee, Oklahoma
60 km (37 miles) E of OKLAHOMA CITY, Oklahoma
61 km (37 miles) SE of Guthrie, Oklahoma
63 km (39 miles) NE of Norman, Oklahoma
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)
UPDATE: The title for this post is no longer appropriate. While we were sleeping, Oklahoma continued to have earthquakes. I have a spreadsheet that shows the earthquake activity since 1990 from a square area that includes Texas, Oklahoma, a teeny bit of New Mexico and Mexico. Notice the recent dramatic spike.
Graph data from USGS shows earthquake activity from 1990 to 10-28-11 in a square area that includes all of Texas and Oklahoma and a tiny bit of New Mexico and Mexico.
Obviously, this graph does not include the most recent earthquakes in Oklahoma. I am working on plotting all the quakes on a map that is color coded by year. It’s a striking visual.
Now for list the latest activity:
3.2M Event Page
Magnitude 3.2 - OKLAHOMA
2011 November 06 07:32:40 UTC
Earthquake Details
This event has been reviewed by a seismologist.
Magnitude / 3.2Date-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
3.4M Event Page
Magnitude 3.4 - OKLAHOMA
2011 November 06 09:22:04 UTC
Earthquake Details
This event has been reviewed by a seismologist.
Magnitude / 3.4Date-Time / Sunday, November 06, 2011 at 09:22:04 UTC
Sunday, November 06, 2011 at 03:22:04 AM at epicenter
Time of Earthquake in other Time Zones
Location / 35.585°N, 96.823°W
Depth / 5 km (3.1 miles)
Region / OKLAHOMA
Distances / 29 km (18 miles) NNE of Shawnee, Oklahoma
63 km (39 miles) SSE of Stillwater, Oklahoma
64 km (39 miles) ESE of Guthrie, Oklahoma
64 km (39 miles) ENE of OKLAHOMA CITY, Oklahoma
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
4.0M Event Page
Magnitude 4.0 - OKLAHOMA
2011 November 06 09:39:57 UTC
Earthquake Details
This event has been reviewed by a seismologist.
Magnitude / 4.0Date-Time / Sunday, November 06, 2011 at 09:39:57 UTC
Sunday, November 06, 2011 at 03:39:57 AM at epicenter
Time of Earthquake in other Time Zones
Location / 35.506°N, 96.865°W
Depth / 5 km (3.1 miles)
Region / OKLAHOMA
Distances / 20 km (12 miles) NNE of Shawnee, Oklahoma
59 km (36 miles) E of OKLAHOMA CITY, Oklahoma
60 km (37 miles) ENE of Norman, Oklahoma
64 km (39 miles) SE of Guthrie, Oklahoma
Location Uncertainty / horizontal +/- 11 km (6.8 miles); depth +/- 3 km (1.9 miles)
Parameters / NST= 60, Nph= 80, Dmin=106.9 km, Rmss=0.85 sec, Gp= 32°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=5
Source / Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID / usb0006kqq
3.9M Event Page
Magnitude 3.9 - OKLAHOMA
2011 November 06 10:52:35 UTC
Earthquake Details
This event has been reviewed by a seismologist.
Magnitude / 3.9Date-Time / Sunday, November 06, 2011 at 10:52:35 UTC
Sunday, November 06, 2011 at 04:52:35 AM at epicenter
Time of Earthquake in other Time Zones
Location / 35.567°N, 96.797°W
Depth / 5 km (3.1 miles)
Region / OKLAHOMA
Distances / 29 km (18 miles) NNE of Shawnee, Oklahoma
64 km (39 miles) SSE of Stillwater, Oklahoma
66 km (41 miles) ESE of Guthrie, Oklahoma
66 km (41 miles) E of OKLAHOMA CITY, Oklahoma
Location Uncertainty / horizontal +/- 9.4 km (5.8 miles); depth +/- 3 km (1.9 miles)
Parameters / NST= 50, Nph= 71, Dmin=99.1 km, Rmss=0.69 sec, Gp= 61°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=7
Source / Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID / usb0006krn
3.2M Event Page
2.7M Event Page
3.0M Event Page
The comments on this post from an oil field worker are enlightening. I advise everyone living in a Gas Patch anywhere in the world to go outside now and take pictures of your foundation. Take pictures every week. This might provide some documentation about the shape of your foundation prior to fracking earthquakes. I don’t know about other areas but Texans cannot get earthquake insurance so you are on your own.