Posted on 04/18/2008 2:45:28 AM PDT by dinoparty
Decatur, Illinois
My wife and I just felt a very noticeable earthquake.
Widespread reports of tremor Northeast Indiana via scanner.
felt it in Bloomington, IN too. It was meantioned on Indianapolis news that they felt it too.
Hey, this is a family oriented website. You can’t post stuff like that here.
But thanks for sharing.
(just kidding)
Feli it just now in Louisville! House shook and woke the whole family up.
No reports yet, local news is quiet.
Felt it here in Northern Indiana. Woke me up. Called the local police and officer on duty thought he might be having caffeine withdrawals.
5:37 am....
We felt it in Chamnpaign, IL. Lamps were shaking.
Woke me up in Newman, Illinois.
Yep we felt it here In Greenwood In.
one short one then one rolling tremmor about 5 to 10 seconds long
We felt it in St. Louis as well. Lasted about 40 seconds. No damage.
I am really curious. What were the police supposed to do?
Felt in St. Louis. Weird. Somebody wake Drudge up! He he.
5.4 2008/04/18 09:36:57 38.501 -87.898 10.0 10 km ( 6 mi) ESE of West Salem, IL
I felt it in downtown St Louis too. Birds go quiet for a minute or so there.
MAP 5.4 2008/04/18 09:36:57 38.501 -87.898 10.0 10 km ( 6 mi) ESE of West Salem, IL
Strong here in southern Illinois (compared to what we’re usd to anyway). Woke me up. I didn’t see anything on FR for a while on it, I started thinking my house was seriously haunted.
I felt it in Versailles, KY! Waiting for a e Report from my friend in Wilmore.
Felt it in Nashville, TN. It’s a 5.0, up on USGS now.
Centered Just NW of Evansville, IL.
I did too. And I’m in Saint Louis.
My thread was locked but I felt it in Trenton, Il - about 45 min. east of St. Louis. Wierd.
Woke me, my wife, and one of my kids up in St. Louis area. Very strange — first one I’ve ever experienced. Gentle rolling sensation.
USGS says 5.4
It woke me out of a sound sleep here in Bowling Green, Kentucky!
I wanted to talk to someone awake and alert; also to learn if they had received other calls. Did really expect them to do anything other than share information. Besides, nothing on FR or USGS at the time, so I thought I might be having alcohol withdrawals.
I was wondering when the FR post was gonna come too. If a bottle hadn’t fallen over in the kitchen I probably would have thought it was my imagination.
Woke me and Mr G up here in Nashville TN area.
Woke all of us up at our house in Murphysboro - humans and cats.
I felt it in SW Illinois about 85 miles south of St Louis.
It was shaker this time. Woke me up out of a dead sleep.
Looks like Evansville or Vinecense is the closet mid-sized towns. Not too much in that area.
So I’m not crazy!! It woke me up too, in Marshall, IL area!
-A8
I’m in E’ville at work, the phone is ringing off the hook.
In St. Louis here too. Felt it big time.
epicenter in st louis, i felt it here about 5 minutes ago (detroit,mi)
Earthquake Details
Magnitude 5.4 (Preliminary magnitude — subject to revision)
Date-Time Friday, April 18, 2008 at 09:36:57 UTC
Friday, April 18, 2008 at 04:36:57 AM at epicenter
Location 38.501°N, 87.898°W
Depth 10 km (6.2 miles) set by location program
Region ILLINOIS
Distances 10 km (6 miles) ESE (103°) from West Salem, IL
10 km (6 miles) NE (55°) from Bone Gap, IL
13 km (8 miles) N (4°) from Bellmont, IL
39 km (24 miles) WSW (239°) from Vincennes, IN
66 km (41 miles) NNW (333°) from Evansville, IN
204 km (127 miles) E (93°) from St. Louis, MO
Location Uncertainty Error estimate not available
Parameters NST=021, Nph=021, Dmin=263.2 km, Rmss=1.07 sec, Gp=119°,
M-type=moment magnitude (Mw), Version=1
Source West Coast and Alaska Tsunami Warning Center/NOAA/NWS
Event ID at00851141
We felt a tremmor in Florissant, Missouri,that’s north St. Louis county. Lasted about 20-30 seconds.
I’m from Danville. Earthquakes are not too common around here, are they?
I lived in California for 26 years, and this is the strongest earthquake I have ever felt! Hahahaha.
I picked a heckuva day to quick popping amphetamines.
/airplane
Felt it here in Indianapolis. Larger than the last one.
That’s what I felt in Nashville. My first one too. Felt like about 5 sways.
Hi Neighbors
nothing like a damn earthquake to bring us together!
Woke us up in Portland.
Take a deep breath.
It wasn’t a 12 or anything
We are in Portland
Tennessee
But the coffee isn’t ready yet.
Wabash River Fault Zone is an identified seismic hazard, and is believed from paleoseismic evidence to have generated quakes up to M 7.5 several thousand years ago.
http://www.sciencedaily.com/releases/2003/05/030515075354.htm
Ancient Fault Lines May Have Become Re-activated
ScienceDaily (May 15, 2003) — On June 18, 2002, a magnitude 5.0 earthquake occurred in southern Indiana, followed by a 1.2 magnitude aftershock on June 25, 2002. Because the region of occurrence, the Wabash Valley Seismic Zone, is seismically active, Dr. Won-Young Kim, a seismologist with the Lamont-Doherty Earth Observatory at Columbia University, conducted research to determine the potential hazard of future earthquakes to this region. His findings suggest that an ancient fault line dating back to the Precambrian era of geological history (from 4.6 billion to 570 million years ago) has become reactivated and was the likely cause of the June 2002 earthquakes. Kim is presenting his findings at the Seismological Society of America in May, and publishing in the Bulletin of the Seismological Society of America.
Through analysis of high-quality broadband waveform data from the June 18 earthquake, Kim determined that the earthquake’s epicenter occurred at a depth of 18±2 km (11.2 miles) below ground level, deeper than most earthquakes in stable continental regions. By combining this location with the June 25 aftershock, which occurred at 20 km depth, Kim suggests that the earthquakes can be attributed to a steeply dipping fault, known as the Caborn Fault, associated with a rift system once responsible for the breakup of an ancient supercontinent.
“Old continental crust contains a billion-year record of past tectonic activity. This area was once as seismically active as the Gulf of California is today,” said Won-Young Kim. “The reactivation of this fault may be due to the forces that are moving the North American Plate over the Earth’s mantle. The depth of this earthquake suggests that these forces are quite large, even though they far away from present plate boundaries.”
The June 2002 earthquake is one of the largest seismic events instrumentally recorded for the Wabash Valley Seismic Zone, which extends to southeastern Illinois, southwestern Indiana and parts of western Kentucky. This zone is considered a source of strong earthquakes with geological evidence of prehistoric earthquakes of up to magnitude 7.5. The Wabash Valley Fault System, a fault system within the Seismic Zone, is probably the best documented fault system in the eastern United States due to past petroleum exploration in the area, yet seismologically it is poorly understood. It is known that many of the Wabash Valley faults extend into rocks from the Precambrian era, to at least 7 km depth.
Kim’s research is the first to directly correlate an earthquake with one of the known faults in the Wabash Valley Fault System. His findings suggest that the strike-slip faulting on this Caborn fault was happening on a near vertical fault plane at 18 km depth, indicating that ancient buried faults associated with a possible Precambrian rift system are being reactivated by contemporary compressive stress.
“We don’t yet understand how faults are reactivated, but it appears that some pre-existing faults are more likely to break than others. The study of this sequence should help us to determine the likelihood of future occurrences. More research on these anomalous quakes is required,” said Kim.
Earthquake rattles Tri-State
An earthquake measuring magnitude 5.4 with an epicenter in Southeastern Illinois rattled the Tri-State in the early morning hours Friday.
The shaking, which started at about 4:35 a.m. CDT, lasted about 10 seconds.
A reporter at the Associated Press building in downtown Indianapolis reported feeling the earthquake as well. Scott Rosenburgh, a former Courier & Press advertising manager now working in a suburb northwest of Chicago, said the quake woke him there. No damage has been reported to police dispatch yet. More information will be posted as it becomes available.
Is everybody in STL up at this time of day? Sheesh! Guess it takes an earth quake to find out who my FReeper neighbors are...
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