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Author Topic: The New Madrid Seismic Zone 2017 - 2018  (Read 724 times)

Yowbarb

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The New Madrid Seismic Zone 2017 - 2018
« on: November 15, 2017, 01:33:28 PM »
Yowbarb Note:  This is the new Topic for the New Madrid.
Please post here your thoughts on how far away a person should live from this zone, experiences and updates of scientific info.
Caption for the screen shot, map:
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http://geology.com/usgs/new-madrid-seismic-zone/   

Earthquake Hazard in the New Madrid Seismic Zone
Scientists remain concerned about a major destructive earthquake


New Madrid earthquake map: Topographic map showing earthquakes greater than magnitude 2.5 (circles) of the central United States. Red circles are earthquakes that occurred after 1972 from the USGS Preliminary Determination of Epicenters catalog. Blue circles are earthquakes that occurred before 1973 from the USGS Preliminary Determination of Epicenters catalog and historical catalog. Larger earthquakes are represented by larger circles. Yellow patches show urban areas with populations greater than 10,000. USGS image
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http://geology.com/usgs/new-madrid-seismic-zone/

About two hundred years ago three of the most powerful earthquakes in the recorded history of North America occurred along the Mississippi River in southeastern Missouri. They shook the Mississippi Valley and much of eastern United States on December 16, 1811; January 23, 1812; and February 7, 1812 with estimated magnitudes between 7.0 and 8.0.

Vulnerable Communities in the Mississippi Valley
There is broad agreement in the scientific community that a continuing concern exists for a major destructive earthquake in the New Madrid seismic zone. Many structures in Memphis, Tenn., St. Louis, Mo., and other communities in the central Mississippi River Valley region are vulnerable and at risk from severe ground shaking. This assessment is based on decades of research on New Madrid earthquakes and related phenomena by dozens of Federal, university, State, and consulting earth scientists.

Considerable interest has developed recently from media reports that the New Madrid seismic zone may be shutting down. These reports stem from published research using global positioning system (GPS) instruments with results of geodetic measurements of strain in the Earth’s crust. Because of a lack of measurable strain at the surface in some areas of the seismic zone over the past 14 years, arguments have been advanced that there is no buildup of stress at depth within the New Madrid seismic zone and that the zone may no longer pose a significant hazard.

As part of the consensus-building process used to develop the national seismic hazard maps, the U.S. Geological Survey convened a workshop of experts in 2006 to evaluate the latest findings in earthquake hazards in the Eastern United States. These experts considered the GPS data from New Madrid available at that time that also showed little to no ground movement at the surface. The experts did not find the GPS data to be a convincing reason to lower the assessment of earthquake hazard in the New Madrid region, especially in light of the many other types of data that are used to construct the hazard assessment, several of which are described here.

[Continued at http://geology.com/usgs/new-madrid-seismic-zone/ ]
© 2005-2017 Geology.com. All Rights Reserved.

Yowbarb

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Re: The New Madrid Seismic Zone 2017 - 2018
« Reply #1 on: November 15, 2017, 01:41:11 PM »
New Madrid Seismic Zone

Yowbarb

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Re: The New Madrid Seismic Zone 2017 - 2018
« Reply #2 on: January 16, 2018, 07:13:41 PM »
Video on this page:
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http://wqad.com/2018/01/16/earthquake-shakes-area-of-new-madrid-seismic-zone/

Earthquake shakes area of New Madrid Seismic Zone

POSTED 11:41 AM, January 16, 2018, BY ERIC SORENSEN,

An earthquake was reported the morning of Tuesday, July 16 along the zone known as the "New Madrid Seismic Zone." The tremor began at 10:57 a.m. local time, according to the U.S. Geological Survey National Earthquake Information Center.  The magnitude 3.6 was centered 4 kilometers southwest of Caruthersville, Missouri.

[ Learn more about the New Madrid Seismic Zone: https://dnr.mo.gov/geology/geosrv/geores/techbulletin1.htm ]

According to KFVS-TV in Cape Girardeau, Missouri, residents of Southern Illinois, Missouri, Tennessee, Kentucky, and Arkansas felt it.

There were no reports of damage Tuesday morning.

According to the Missouri Geological Survey, "The seismic zone appears to be about 30 years overdue for a magnitude 6.3 quake, because the last quake of this size occurred 100 hundred years ago at Charleston, Missouri, Oct. 31, 1895 (it was a magnitude 6.7)."

-Meteorologist Eric Sorensen

Yowbarb

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Re: The New Madrid Seismic Zone 2017 - 2018
« Reply #3 on: January 17, 2018, 01:37:24 AM »
http://www.new-madrid.mo.us/index.aspx?NID=105   New Madrid, Missouri

Monthly Earthquake Summary for January 2018

Tuesday, January 16, 2018
A micro earthquake at 10:57 am with a 3.6 event occurring 1.6 miles SW of Caruthersville, MO. The hypocentral depth was 5.8 miles.

Tuesday, January 16, 2018
A micro earthquake at 3:13 am with a 1.5 event occurring 4.3 miles W of Tiptonville, TN. The hypocentral depth was 6.2 miles.

Monday, January 15, 2018
A micro earthquake at 12:29 pm with a 2.3 event occurring 8.1 miles S of Arcadia, MO. The hypocentral depth was 9.1 miles.

Thursday, January 11, 2018
A micro earthquake at 10:37 am with a 1.8 event occurring 7.2 miles E of Pangburn, AR. The hypocentral depth was 5.5 miles.

Thursday, January 11, 2018
A micro earthquake at 2:23 am with a 1.8 event occurring 1.4 miles SE of Marston, MO. The hypocentral depth was 6.3 miles.

Tuesday, January 9, 2018
A micro earthquake at 7:36 pm with a 2.4 event occurring 4.6 miles E of Pangburn, AR. The hypocentral depth was .3 miles.

Tuesday, January 9, 2018
A micro earthquake at 2:47 am with a 2.4 event occurring 5.7 miles SE of Marston, MO. The hypocentral depth was 5.4 miles.

Tuesday, January 9, 2018
A micro earthquake at 12:13 am with a1.5 event occurring .3 miles S of Ridgely, TN. The hypocentral depth was 4.6 miles.

Monday, January 8, 2018
A micro earthquake at 3:25 am with a 2.3 event occurring 5.7 miles E of Pangburn, AR. The hypocentral depth was 1.6 miles.

Sunday, January 7, 2018
A micro earthquake at 11:32 pm with a 1.2 event occurring .8 miles N of Howardville, MO. The hypocentral depth was 3.8 miles.

Sunday, January 7, 2018
A micro earthquake at 4:21 am with a 1.8 event occurring .8 miles NW of Ridgely, TN. The hypocentral depth was 5.2 miles.

Friday, January 5, 2018
A micro earthquake at 6:39am with a 2.5 event occurring 2.2 miles N of Blytheville, AR. The hypocentral depth was 4.5 miles.

Thursday, January 4, 2018
A micro earthquake at 10:41 am with a 2.2 event occurring .8 miles NE of Ridgely, TN. The hypocentral depth was 3.9 miles.

Wednesday, January 3, 2018
A micro earthquake at 6:38 am with a 2.3 event occurring 1.9 miles N of Cooter, MO. The hypocentral depth was 5 miles.

Tuesday, January 2, 2018
A micro earthquake at 5:11 pm with a 2.2 event occurring .4 miles W of Cooter, MO. The hypocentral depth was 5.4 miles.

R.R. Book

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Re: The New Madrid Seismic Zone 2017 - 2018
« Reply #4 on: January 17, 2018, 04:53:47 AM »
With comments by Dutchsinse that Oklahoma is absorbing much of the seismic activity from the New Madrid now, one wonders how much larger these latest quakes in MO, AR and TN might have been had this not been a mitigating factor. 

Yowbarb

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Re: The New Madrid Seismic Zone 2017 - 2018
« Reply #5 on: February 02, 2018, 11:22:55 PM »
With comments by Dutchsinse that Oklahoma is absorbing much of the seismic activity from the New Madrid now, one wonders how much larger these latest quakes in MO, AR and TN might have been had this not been a mitigating factor.

Interesting...

Yowbarb

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Re: The New Madrid Seismic Zone 2017 - 2018
« Reply #6 on: February 02, 2018, 11:29:55 PM »
1 month ago -

River levels above New Madrid drop | Video of low Illinois River?    10:41   26,945 views

https://youtu.be/A0uxGN31EuM

MrMBB333
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Yowbarb

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Re: The New Madrid Seismic Zone 2017 - 2018
« Reply #7 on: February 04, 2018, 01:16:19 PM »

 

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