Order of Kilopi
Not sure if this should go here, or in CT...
We had another earthquack this morning. (yes that's quack, more like a burp). Only a 2.8, and I'm about 10 miles away... never felt it.
My question is this: Even though I know that there are a few minor fault lines running through Ohio, and primarily where these have been occuring, Is there a possibility that Salt Mining could have an affect on Earthquake activity?
Order of Kilopi
My question is still valid, but..
I'm starting to think that quack really is the right substitute for quake.
The article says "Officials"... Officials of what? 3 hours later, and I can not find any other resource that mentions an earthquake. I have a feeling someone in thier newsroom picked up a piece of paper left over from last week.
Edit:
finally another report Many experienced the rubbles of an earthquake
RUBBLES?If you felt the rubblings, e-mail us:
Administrator
The most famous Rubble is of course Barney. And he did live in Bedrock, so the connection to earthquakes is obvious....Originally Posted by NEOWatcher
My question is still valid, but..
I'm starting to think that quack really is the right substitute for quake.
The article says "Officials"... Officials of what? 3 hours later, and I can not find any other resource that mentions an earthquake. I have a feeling someone in thier newsroom picked up a piece of paper left over from last week.
Edit:
finally another report Many experienced the rubbles of an earthquake
RUBBLES?
Anyway, there is the Ohio Seismic Network, run by the Division of Natural Resources. If you scroll down, there are reports of recent ones - they have the Jan. 6th quake, but not the latest.
By the way, I live in Mentor, within a couple of miles of both of these, and I slept through both.
Order of Kilopi
I see a couple of recent quakes near New Madrid.
http://earthquake.usgs.gov/recenteqs/
I don't see anything on the map that has a center in Ohio.
Could mining cause an earthquake? Unlikely, although if they blast that could be picked up on the seismic recorders. They should filter out those events with manmade causes when they produce reports of actual quakes, though.
Order of Kilopi
What did you do, sleep-in because it's Fri 13?
Being that your near the epicenter of most of them around here, how many have you actually felt? I only felt the big one (5.x) in the mid 80s.
Actually channel 5 updated and said thier source was Oh Siesmic Network.
I guess nobody told USGS yet.
It looks like channel 3 found thier spell check, or a few people called in grubbling about it to them.
Administrator
No, my bad, I thought today's was overnight too. I was at work, in Solon, so was miles away.
I didn't live here in 1986, when the "big one" hit (I arrived in 87). There was one in 1990 or 1991 that I felt when we lived in Willoughby Hills, but I couldn't figure out which one it was on the interactive map that's on the website. Other than that, I haven't noticed any others.
Order of Kilopi
Didn't you hear? Ohio is now part of Canada, eh. You need to consult Earthquakes Canada.
Recent Activity Map Southern Ontario2006/01/13 15:32:17 41.83N 81.44W 5.0g 2.5MN GSC South shore Lake Erie.
Order of Kilopi
That's where I'm working. I guess the dumps act like a damper.
Administrator
Cool!I like beer, donuts, hockey and free health insurance, eh.
Order of Kilopi
Order of Kilopi
I'm not sure about that specific case, but it is said that human activities can have an effect on faults. This is sometimes discussed with regard to dams, i.e. that the weight of the water may trigger earthquakes. I've never heard anything about the opposite, i.e. that taking stuff out of the ground could release weight from a fault, but I guess it's not impossible.Not sure if this should go here, or in CT...
Is there a possibility that Salt Mining could have an affect on Earthquake activity?
As above, so below
Order of Kilopi
USGS: Earthquake Facts and Earthquake Fantasy
People can cause earthquakes.
PARTIALLY FACT: Earthquakes induced by human activity have been documented in a few locations in the United States, Japan, and Canada. The cause was injection of fluids into deep wells for waste disposal and secondary recovery of oil, and the filling of large reservoirs for water supplies. Most of these earthquakes were minor. Deep mining can cause small to moderate quakes and nuclear testing has caused small earthquakes in the immediate area surrounding the test site, but other human activities have not been shown to trigger subsequent earthquakes. Earthquakes are part of a global tectonic process that generally occurs well beyond the influence or control of humans. The focus (point of origin) of an earthquake is typically tens to hundreds of miles underground, and the scale and force necessary to produce earthquakes are well beyond our daily lives.
Banned
Its up on the USG geo., site now..and at 2.4 not to many people would feel that. you would need to be indoors and sitting or laying down. If you were asleep this would not be enough to wake you. A glass tumbler filled with water on the table would just show signes of movement. Generally they need to reach 3.5 be for most people would notice.
And no. I hardly think people pocking about in mines would be triggering seismic movement.
Order of Kilopi
2.4? We have those almost every day. Wake me up when you have a 6. something, and don't bother making a fuss unless it hits 8
Order of Kilopi
Thanks for the link, and did some looking.
So yes, it's possible (especially with this size quake), but in this case, No.
Salt mines under H.O.M.E.S. are a few thousand feet, this epicenter deeper than 4.7km (6.7 +/- 2km)
USGS calls it a Micro Earthquake. I like itit puts it into perspective. It kind of goes along with PhantomWolf's comment. We had a 5.x a couple of decades ago, and that was huge news, someones chimney actually lost a few bricks
. No real damage, but it was a good conversation starter.
Order of Kilopi
They don't call us the Shaky Isles for nothing.
Order of Kilopi
Huge mining operations near the coast of North Carolina were said to be associated with small earthquakes--speculation was that removal of groundwater to form slurry for the pipeline was also a large contributor.
Established Member
I am dreading the eventual major quake that's bound to happen along the New Madrid fault. When that one goes, it's going to be horribly messy here in Kentucky...
I remember the first quake I ever felt was as a kid in Ohio. And that was from a 4 or 5 quake at New Madrid.
Since then, I've lived in Alaska, which has quakes all the time. Finally felt a (distant) 6.0 and, let me tell you, that was an experience.
When New Madrid lets go... ugh.
Member
About 18 years ago, my wife, daughter and I were camped out in the mountains near Crested Butte, CO, when a quake about 4.5 hit. I don't know what had awakened me - intuition, a previous tremor - but I was fully awake when it hit. Literally, it propelled me off the ground, slightly to be sure, but noticeably. Later we learned we'd been camped right over the epicenter.
The USGS set up monitoring stations as they knew of no faults in the area. Aftershocks went on for weeks. I live 40 miles from the epicenter, and some of the aftershocks woke us in the middle of the night. Some, you could hear coming down the valley before they hit. Once, I was on an extension ladder, 25 feet up, and heard one coming. I just held on. Maybe this is day-to-day stuff in California, but shaking on a ladder 25 feet up whitened my knuckles.
The USGS determined a number of faults existed, and they had resulted from the weight of ice during the last ice age. The energy being released came from the rocks "rebounding."
Interestingly, after a few months the quakes ceased and haven't returned.
Bad Post-Doc
I assure you that anyone 25 feet up on a ladder during an earthquake in California would almost certainly be scared as well! It's only when we're firmly on the ground that Californians are blase about it. (Welcome to the board, btw.)
In fact, one of the most famous earthquake experiences of my childhood, at least in the area, was the Whittier earthquake when I was in fifth grade. It coincidentally hit during the five minute local news break during Today on NBC. The newscaster and the weatherman exchanged looks, then dove under the desk, and if you've ever been in a TV studio, you'll understand why--those lights are heavy.
_____________________________________________
Gillian
"Now everyone was giving her that kind of look UFOlogists get when they suddenly say, 'Hey, if you shade your eyes you can see it is just a flock of geese after all.'"
"You can't erase icing."
"I can't believe it doesn't work! I found it on the internet, man!"
Administrator
For those keeping score, northeast Ohio just had another
US Geological Survey.
This one I felt. It was about 7:30 a.m. local time and I was just finishing breakfast. Heard a loud bang and felt a slight vibration. I thought something had hit the roof of our house, but when I went outside to look I saw nothing. Found out later it was an Earthquake.
Order of Kilopi
You better get out of the quake zone while you can. We don't feel earthquakes in Summit.
Order of Kilopi
Moved from Q&A to General Science (and sorry for the delay).
Order of Kilopi
Sorry for the bump. But I had to comment about this article, and it wasn't worth a new thread.
New information on that quake that shook Northeast Ohio yesterday.
Oh my gosh, an aftershock. 0.2... We better report it
Are they sure someone didn't burp?
Order of Kilopi
Pretty healthy burp! Wouldn't that be about 4 pounds of TNT? And that's "only the amount radiated from the earthquake as seismic waves, which ought to be a small fraction of the total energy transfered during the earthquake process."Sorry for the bump. But I had to comment about this article, and it wasn't worth a new thread.
New information on that quake that shook Northeast Ohio yesterday.
Oh my gosh, an aftershock. 0.2... We better report it
Are they sure someone didn't burp?
Order of Kilopi
Thanks for the link.
I got to "This accounts for the usual spread of around 0.2 magnitude" and thought, well we might of had the spread bring it down to 0... no shock at all.
Then I kept going and saw a Richter of -1.5. I never knew they can go negative.
(yep, skipped past the details... but still learned something)
Order of Kilopi
No problem, although looking at it now, I'm starting to wonder about something. In its chart, it lists 6 ounces of TNT as equivalent to breaking a rock on a lab table. Can that really be true?
Established Member
Several years ago, I was visiting Washington D.C. I had just retired for the night in a 20 story hotel when I heard a sizzling sound like electrical shorting. I got out of bed and turned the lights on. The ceiling above my bed which was poured concrete had a 4 foot hairline crack that wasn't there a few moments before.
At almost the same time about a mile away, there was construction site which had excavated down 3 stories in preparation of a new building. One side of the construction site caved in causing the building I was staying in to flex sufficiently to crack the ceiling.
I called down to the front desk to report the cracked ceiling. They offered to relocate me to another room. I declined the offer but then I spent the rest of the night pushing back nightmares while I slept under cracked concrete.
Order of Kilopi
I can believe it... to break the rock, the force could be enough to destroy a normal table which I envision could match the effect a 1/3 lb of explosives.
Also, if these "equivalencies" are at the epicenter, then the explosion would be 5 km below ground. Hardly noticeable...
And guess what... the media got it wrong anyway (typical).
The aftershock was actually 2.2 according to The Ohio Seismic Network
Administrator
Story on their website today
LINKMENTOR, Ohio (AP) -- A corner of suburban Cleveland has become the earthquake capital of Ohio, shaking on average every two weeks since New Year's Day and making people wonder: What's next?
The quakes haven't caused any serious problems and sometimes even go unnoticed. Experts aren't sure why they are happening, but they do know they are happening frequently: Twelve were recorded in the area by July 1.
I don't know why today, must be a slow news day. The last quake was a 2.1 on July 1.
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