Aces High Bulletin Board
General Forums => The O' Club => Topic started by: Getback on April 18, 2008, 04:54:13 AM
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An Earthquake woke me up this morning and of all places here in Indiana. Scared the tar out of me. Must have been a full magnitude of 1. Jeeze, can't a man get some sleep.
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Just read about this not 5 minutes ago.
AP reporting it as a 5.4 at its epicenter
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5.2 from what I read. Felt it at 5:40 this morning.
The New Madrid is a major fault line. There have been a few cataclysmic quakes along this fault in recorded history but none since around the year 1800.
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Woke me right up out of bed this morning.
I woke up with a hard jar and then some pretty good shaking for about 8 seconds, then from 9 to maybe 20-25 seconds it got weaker and weaker before it quit. First time I been through a quake so I didnt really know what one was like.
The moment I realised it was one, the first thought that came to me was "How far away is the big one"
Time to make sure we got all the supplies
No damage here though
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Woke me right up out of bed this morning.
I woke up with a hard jar and then some pretty good shaking for about 8 seconds, then from 9 to maybe 20-25 seconds after I felt it, it got weaker and weaker before it quit. First time I been through a quake so I didnt really know what one was like.
The moment I realised it was one, the first thought that came to me was "How far away is the big one"
Time to make sure we got all the supplies
No damage here though
Great, I screwed this one up. I was going to edit it and I hit quote and changed it in there. Im too tired to be doing this right now
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That was a helluva way to get woken up this morning.
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i woke up hungover to one in charleston, sc in the very early 1990s... the band i was playing in was playing at "Rockburger"... I drank until like 9 that morning it hit just as i took my first step that afternoon... TOTALLY freaked me out - thought I was having a stroke!
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Woke me up this morning too. I've been in Ohio for 14 years and that's the first one I've felt since I've been here. Nothing like when I was stationed in CA :rock
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Well I guess the next time I say something about tornados to one of you flatlanders you wont be able to say "at least we don't have earthquakes". :D
A 5.4 is a gentle rocking should have lulled you right back to sleep. :O
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A 5.4 is a gentle rocking should have lulled you right back to sleep. :O
If it woke you at all.
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Where was the epicenter?
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It woke me up at 4:40 but was back asleep a minute or two later. Asked my son about it later when I got him up for school but he didn't know anything had happened. To prove how minor it felt my wife thought it was he guidedog shaking the bed because it woke the dog up and she came sitting next to the bed.
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Where was the epicenter?
West Salem, IL
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Slept right throught it.
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glad it was no worse and no-one was hurt.
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Wouldn't it be the irony or ironies if everything East of the San Anderas Fault slid into the Atlantic Ocean?
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Don't worry, it's just God punishing America for condoning homosexuals.
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Actually, due to geology if a major quake were to hit the New Madrid fault it could potentially cause even MORE widespread damage than the equivalent magnitude of a quake striking along the San Andreas.
The 1812 New Madrid Earthquake is estimated at about 7.9-8.0 and impacted some 50,000 square miles. By comparison, the equivalent 1906 San Francisco Earthquake (maximum estimates of 8.3) affected "only" 6000 square miles. The only thing that would spare the Midwest is the lower population density.
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5.2 from what I read. Felt it at 5:40 this morning.
The New Madrid is a major fault line. There have been a few cataclysmic quakes along this fault in recorded history but none since around the year 1800.
The New Madrid Earthquake, one of the largest earthquakes ever recorded in the contiguous United States, occurred on February 7, 1812. It got its name from its primary location in the New Madrid Seismic Zone, near New Madrid, Louisiana Territory (now Missouri).
This earthquake was preceded by three other major quakes: two on December 16, 1811, and one on January 23, 1812. These earthquakes destroyed approximately half the town of New Madrid. There were also numerous aftershocks in the area for the rest of that winter.
There are estimates that the earthquakes were felt strongly over 50,000 square miles (130,000 kmē), and moderately across nearly one million square miles. The historic San Francisco earthquake of 1906, by comparison, was felt moderately over 6,000 square miles (16,000 kmē).
Mississippi river flowed backwards to form reelfoot lake.
:aok
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Wow, I missed the "Moderately Impacted" part of the description. It's frightening considering that the 1812 and 1906 quakes were fairly close in maximum estimated magnitude (with the 1906 quake being estimated as somewhat higher)
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One thing to consider is that all the energy from the the 1906 SF earthquake was concentrated into a smaller area, which would cause more damage. Also a change of just 1 ie. 3-4 on the Richter(sp) scale is an increase to a factor of something like 32 in the energy released.
Either way a large quake is no laughing matter being capable of massive destruction.
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SIK,
An 8-magnitude quake is an 8-magnitude quake. The damage inflicted by the 1906 quake was because the POPULATION was more concentrated, NOT the fact that the quake ITSELF was. Had the New Madrid, MO area had the same population density and level of urbanization during the 1812 quake as San Francisco had in 1906 we'd be looking at a similar level of destruction.
Also, as I said before, the 1812 New Madrid and 1906 San Francisco quakes were roughly of the same magnitude.
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Slept through the main quake, felt the after-shock about 11am today.
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I felt it this morning. That's about the 4th quake I have felt here in northern Indiana over the last 20 years. :uhoh
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My Ma slept through a 9+ quake in Alaska in 1964. :)
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One guy I work said he had about a 3ft crack in his foundation this morning after the 5.2 one hit
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My Ma slept through a 9+ quake in Alaska in 1964. :)
TexasMom I remember that quake. Seems like Life magazine had a cover story on it. That was a BAD one!
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The New Madrid Earthquake, one of the largest earthquakes ever recorded in the contiguous United States, occurred on February 7, 1812. It got its name from its primary location in the New Madrid Seismic Zone, near New Madrid, Louisiana Territory (now Missouri).
This earthquake was preceded by three other major quakes: two on December 16, 1811, and one on January 23, 1812. These earthquakes destroyed approximately half the town of New Madrid. There were also numerous aftershocks in the area for the rest of that winter.
There are estimates that the earthquakes were felt strongly over 50,000 square miles (130,000 kmē), and moderately across nearly one million square miles. The historic San Francisco earthquake of 1906, by comparison, was felt moderately over 6,000 square miles (16,000 kmē).
Mississippi river flowed backwards to form reelfoot lake.
:aok
Woke us up here in Missouri, but no damage.
Here are a few links.
Check out some of the first hand accounts. Hard to imagine!
I have duck hunted the New Madrid area many times. The ground is mostly sand and gumbo mud. Not a place to be in an earthquake!
Frodo
PANTHER-ACROSS-THE-SKY
Tecumseh and the New Madrid Earthquake
http://www.ratical.org/ratville/Tecumseh.html
http://hsv.com/genlintr/newmadrd/accnt1.htm
http://hsv.com/genlintr/newmadrd/index.htm
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SIK,
An 8-magnitude quake is an 8-magnitude quake. The damage inflicted by the 1906 quake was because the POPULATION was more concentrated, NOT the fact that the quake ITSELF was. Had the New Madrid, MO area had the same population density and level of urbanization during the 1812 quake as San Francisco had in 1906 we'd be looking at a similar level of destruction.
Also, as I said before, the 1812 New Madrid and 1906 San Francisco quakes were roughly of the same magnitude.
Not quite correct. The rock formations underneath California are very fractured. An earthquake there tends to be more localized because those fractures will limit the distance of the shaking.
In contrast, the midwest is relatively unfractured, and thus the shock waves from an earthquake travel much farther and remain stronger even far away from the epicenter. The way a geologist on the radio described it this morning, you could have a 5.0 at one end of LA and the other end feels virtually nothing -- but if you drop a book in Memphis, a desk will shake in Milwaukee.
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Don't worry, it's just God punishing America for condoning homosexuals.
he hasn't even begun. that yet!!
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Wouldn't it be the irony or ironies if everything East of the San Anderas Fault slid into the Atlantic Ocean?
The San Andreas fault is actually a rather tame fault. It is rather active, but nothing too major or damaging.
However, the New Madrid fault is a ticking timebomb. Some day, no one has ANY clue as to when, everything South East of Kentucky is just going to disappear. Not one single person knows when this will happen. It could happen tomorrow, it could happen a couple billion years from now. It's just going to rip open.
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E25280,
My point is that SIK saying the 1906 quake, and San Andreas in general, was more devastating because the damage was confined to a smaller area is incorrect. As I said before, the only thing that's kept the devastation caused by the New Madrid fault to a minimum is the fact that the population density and level of urbanization is significantly less than the inhabited areas along the San Andreas.
The other problem, getting to what laser is saying, is that New Madrid isn't just a fault line but a failed continental rift. It's been more or less good fortune over the past few million years the continent hasn't been ripped in half and the Mississippi River hasn't turned into a SEA, which NEARLY happened on several occasions already (one such incident is what helped form Lake Superior).
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Pfffft you guys whine about a minor Earthquake?
Oklahoma/Kansas F5 Tornados rule.
Evil Bastages.
Grab the dog Dorthy, We're going to Oz.
Mac
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I was at the computer reading the news and weather before work and felt the house move. Looked over at a house plant and it was swaying back and forth. I thought, "was that a earthquake". Nah, they don't have those in southern Iowa. :lol Heard on the news later in the day that it was a earthquake :O Time was 4:40 am...made sure I looked at the time to make a mental note of it.
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The San Andreas fault is actually a rather tame fault. It is rather active, but nothing too major or damaging.
--- see San Francisco 1906
(http://earthquake.usgs.gov/regional/nca/1906/18april/images/sfburning.gif)
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It's been more or less good fortune over the past few million years the continent hasn't been ripped in half and the Mississippi River hasn't turned into a SEA, which NEARLY happened on several occasions already (one such incident is what helped form Lake Superior).
So everything East of the Mississippi could be sundered from the Midwest and sink into the ocean? And California could fall into the Pacific?
NOW I get what Obama is saying... that's Change I Can Believe In!
:D
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E25280,
My point is that SIK saying the 1906 quake, and San Andreas in general, was more devastating because the damage was confined to a smaller area is incorrect. As I said before, the only thing that's kept the devastation caused by the New Madrid fault to a minimum is the fact that the population density and level of urbanization is significantly less than the inhabited areas along the San Andreas.
The other problem, getting to what laser is saying, is that New Madrid isn't just a fault line but a failed continental rift. It's been more or less good fortune over the past few million years the continent hasn't been ripped in half and the Mississippi River hasn't turned into a SEA, which NEARLY happened on several occasions already (one such incident is what helped form Lake Superior).
Sax my point was that the energy released in the 1906 SF quake was concentrated in a smaller area, think a cherry bomb in a can as opposed to out in the open. Although the more research I do the more I see that the Richter scale is not really a measure of energy, but rather a measure of movement, so I will concede that this may not be a good analogy.
More towards your point of population density, far more damage was done by the fires after the quake than by the quake itself.
CA has several active faults in and around the state. Many runnig through densly populated areas. We have several volcanoes that are "potentially" active (USGS wording) as well. Two of which I can see from my front yard, Mt Shasta, and Lassen peak. Lassen last erupted in 1921, and is seismicly active.
CA is far more active seismiclly than the New Madrid fault. So we may not get ripped apart all at once but a little bit at a time.
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E25280,
My point is that SIK saying the 1906 quake, and San Andreas in general, was more devastating because the damage was confined to a smaller area is incorrect. As I said before, the only thing that's kept the devastation caused by the New Madrid fault to a minimum is the fact that the population density and level of urbanization is significantly less than the inhabited areas along the San Andreas.
The other problem, getting to what laser is saying, is that New Madrid isn't just a fault line but a failed continental rift. It's been more or less good fortune over the past few million years the continent hasn't been ripped in half and the Mississippi River hasn't turned into a SEA, which NEARLY happened on several occasions already (one such incident is what helped form Lake Superior).
What I was really driving at is that the "low population density" of the midwest making midwest quakes a non-factor will not hold water anymore. A magnitude 8 quake in 1812 in the midwest was, as you say, of limited consequence because relatively few people lived there, and there were relatively few large buildings to be damaged.
It isn't 1812 anymore. A magnitude 8 event near modern day San Francisco would be devestating -- to a relatively localized area around the Bay. A magnitude 8 quake in the modern midwest could very well flatten SEVERAL major cities, not to mention all the smaller ones. Take a look at a map of Illinois . . . it isn't "urbanized", but it isn't rural Utah, either. And without a history of quakes, I would wager very few homes and buildings are adequately built to handle a major shaking.
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I dont even think earthquake proofing new homes is required here
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I felt this last one in Milwaukee! 12:38 AM CST... I felt a minor vibration like a airliner on final or a loud motorcycle, but couldn't hear anything. Just dawned on me to investigate a few minutes ago.
http://www.southernillinoisan.com/articles/2008/04/21/breaking_news/doc480c30f043f35696552381.txt
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Wonder if something big is coming
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http://news.yahoo.com/s/livescience/20080418/sc_livescience/scientistsevenbiggerquakecouldhitmidwest;_ylt=AoCKb4haG7ZI2fN_uZ06u9ys0NUE
Some good info here.
Frodo
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earthquakes in diverse places... a sign of the end days.
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I saw this dude riding on a white horse with a flaming sword in the sky. Is that good or bad?
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--- see San Francisco 1906
(http://earthquake.usgs.gov/regional/nca/1906/18april/images/sfburning.gif)
You think a couple of buildings even begins to measure in magnitude with a tectonic plate just ripping away?
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the sky is falling... :rolleyes:
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I think Indiana needs more Mobile Home Parks.
Ya know kinda tip the Disaster Magnetic Pull towards .... well Indiana.