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Reno Earthquakes

Rains

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Yes, we do need to do that. Id hate for Bob to leave NV with me as the only impression he had :p Im up for pretty much whatever, whenever. I work Mon-Thurs 7am-4:30pm but can take a long lunch if needed, and fridays im off at 11am. Not much on the weekends, but Im not sure about the upcoming month, since my move-out date for my apt. is set in stone for May 31st :shock:. Thats like...33 days to buy a house (this should be interesting;)). Anyhow, OC meet up indeed!
 

PT111

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Here on the East Coast we aren't nearly as concerned about earthquakes as we are hurricanes and SC isn't known for its earthquakes except for the one Charleston quake a good while back. While cruising the Internet one day I ran across the the USGS (I think) site that maps quakes and decided to check out SC. WOW!!!!!! I never realized there were that many in the Carolinas, monstly too small to actually feel but the number is scary. I headed back to the gun sites before I bacame paranoid over some thing else. I think Congress should listen to Ted Kennedy when right after Mt. St. Helens erupted he was quoted as saying Congress should have done something about it rather than just letting it erupt. Maybe they can pass a law against earthquakes.
 

Rains

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I wholly and completely agree. In fact, I can just get some signs made up that say 'Earthquake-Free Zone' and put them up all over. Not even mother nature dare violate the sacred SIGN! Muahahaha! Thanks for that funny reminder about our buddy Ted!



P.S. - Would it be ironic to mention my bumper sticker that says 'Dick Cheney's gun isnt as dangerous as Ted Kennedy's car!'?


PPS - On the actual subject, I havent felt many quakes today save for that one earlier in the morning...perhaps we're out of the forest.
 

Sa45auto

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Let's see, retention during earthquakes.....Hmmmmmm.

A shoulder holster would swing to much.

A small of back holster would do to much damage when you fell down.

Thunder wear would put your valuables at risk when you fell down....

I guess I have to go with a belt holster, that has a fault break. ;)
 

SetivaSicWood

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Perhaps Nevada isn't such a good place to bury nuclear waste after all........

We had a 5.7 out here in Oregon some 13 years ago. The first 10 seconds were hard "Z" wave shocks followed by 35 additional seconds of rolling "S" waves. Geologists coined it as a designer quake... Not enough energy released to do massive damage be definitely enough to get your attention.

Oddly enough there have been "swarms" of smaller quakes from 2.0 to4.0 occurring of the Oregon coast in an area not know to be a fault zone...

Hopethese anot precursor to a larger event about to happen.
 

Sa45auto

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Sorry Bob, but I have been doing a little research on what is going on and it looks like what is happening in Reno is related to what has been happening off the coast of Oregon.

You have the convergence of two major transverse fault systems and I have some grave concerns for the area. :what:

See the attached Map.
 

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Decoligny

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I was in the Phillipines for the Baguio Earthquake in July 1990.

That one was a doozey. I had just gotten home and closed my car door. I immediately ran into the middle of the street away from the house and the electric wires.

Magnitude 7.8 :what::what::what:

Lasted about 45 seconds, about a 2 or 3 second breakand then the aftershock

Magnitude 7.4 :what::what::what:

Lasted about another 40 seconds

I watched my car bouncing up and down, all four tires coming off the ground to a height of about two feet.

Still get a little bit of a panic attack everytime we get a little shaker.
 

Sa45auto

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Decoligny wrote:
I was in the Phillipines for the Baguio Earthquake in July 1990.

That one was a doozey. I had just gotten home and closed my car door. I immediately ran into the middle of the street away from the house and the electric wires.

Magnitude 7.8 :what::what::what:

Lasted about 45 seconds, about a 2 or 3 second breakand then the aftershock

Magnitude 7.4 :what::what::what:

Lasted about another 40 seconds

I watched my car bouncing up and down, all four tires coming off the ground to a height of about two feet.

Still get a little bit of a panic attack everytime we get a little shaker.

The biggest one I ever personally experienced happened at 6:05 in the morning Near LA back in 1971 and registered 7.2. I rode my bed around the room for about a min. The after shocks went on for days and they were digging out the bodies for weeks. :(

There is a little tongue in cheek in my map, BUT the faults are there and the one off the Oregon Coast has been swarming the past few weeks and it does not appear the energy may have moved on to the Reno area. I am a Registered Professional Geologist, BUT I did not stamp it with my seal and thus I am not accountable for my interpretation. :p
 

BobCav

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Sa45auto wrote:
Sorry Bob, but I have been doing a little research on what is going on and it looks like what is happening in Reno is related to what has been happening off the coast of Oregon.

You have the convergence of two major transverse fault systems and I have some grave concerns for the area. :what:

See the attached Map.

I've been researching a lotand it's taking a lot of my free (and not so free) time. We woke this morning to another 4.2 and are still pushing 5-10 smaller (<2.0) per hour. I did research Steamboat Springs and had no idea that this is one of the 7 most geothermally active areas in the WORLD! Peavine Peak, the local mountain outside my window, is a long dormant volcano (50 million years give or take a week) but folks are talking about a possible magma shift.

After looking closely at the Steamboat Springs area, and researching how hot springs are formed, I noticed something in common withthe Sommerset area where the epicenters are. Coming down the south slope of Peavine Peak, I noticed a lot of white patches all over the side of the mountain. I have NO geological experience whatsoever, but it seems to me that it's ground seepage and minerals that are staining the ground. There is a large predominance of those patches around and in the flat area where the Sommerset Country Club is built. The Google Earth pics show during construction and you can still see a lot of those patches around the area.

Reading up on hot springs, geysers, their prevalent terrain and the conditions that create them, there is a very real possibility that that community is built directly on the same flat that nature has decided would be a great spot for geysers/geothermal activity. Look at this map and not the white spots just north of and within the golf course and developing community:
http://maps.google.com/maps?t=h&hl=en&ie=UTF8&ll=39.536483,-119.940362&spn=0.016118,0.031672&z=15

Also along with what you were thinking about fault lines, I noticed this while looking at a bigger picture. It would seem that the fault line would logically continue up the western coast of Mexico, through the Gulf of California, straight up through Reno and continue north west as shown on the attached pic. Perhaps the current activity is the logical continuation of this line and the west coast quakes are a "splintering" as it were. I know nature doesn't deal with straignt lines, but it is interesting to look at. Looking at this pic, the jokes of Cali falling off aren't so funny anymore!
 

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Doug Huffman

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http://www.physorg.com/news128703900.html

Scientists seek clues as earthquakes rattle Reno By SANDRA CHEREB, Associated Press Writer (AP) -- Scientists are scrutinizing seismic readings and studying damage to residents' homes trying to figure out what's happening beneath the earth's surface to cause a troubling swarm of hundreds of earthquakes in northern Nevada.

"We're looking at just about everything," said Diane dePolo, a network seismologist at the University of Nevada, Reno's Seismological Laboratory. "We haven't been able to associate it with any known fault."

During the past week alone, more than 500 mostly minor quakes have been recorded in the area. The two most recent widely felt quakes measured 3.1 and occurred about 11 p.m. Monday.

Scientists are calling the swarm of temblors that began Feb. 28 the "Mogul earthquake sequence," in reference to the northwest Reno neighborhood that's at the epicenter of the earthquakes.

Gov. Jim Gibbons was to be briefed later Tuesday by emergency management officials and UNR seismologists, who have said it's impossible to predict whether the temblors are foreshocks of a bigger quake to come, or aftershocks of what has been.

The shaking is unusual, seismologists say, because the intensity of the quakes has increased over the past few weeks. Generally, earthquakes tend to occur and are followed by smaller aftershocks.

In this case, the earth's rumblings have continued unabated, with barely negligible bumps occurring often minutes apart, followed by occasional larger shakers.

So far the largest was a 4.7 quake that hit at 11:40 p.m. Friday. It was preceded 11 seconds earlier by a 3.3 quake, and followed three minutes later by one registering 3.4.

The temblors sent goods flying off shelves, cracked walls, broke glass and collapsed part of a water flume west of Reno. There were no injuries.

They quakes are mostly shallow, occurring just beneath the surface to within a mile or two.

DePolo said mapping appears to indicate the quake activity is "lining up in a northwest trend."

She said researchers are surveying evidence of ground movement as well as damage at homes to try to determine how the earth is moving.

Much can be learned, experts said, by how homes are positioned and noting which walls pictures fell from, as opposed to others where hangings remained intact.

"What happens at the surface may be different than what happens at a little bit of depth," dePolo said. "We're trying to put the pieces of this puzzle together."

The area where the quakes are occurring is small, she said, measuring about 2.5 miles long and one-third of a mile wide.

"A very small volume of earth is breaking," dePolo said. "The majority of the events have been very localized."

While damage has been minimal, residents' nerves are frazzled.

"You're just so on edge, you just don't know what to do," Cindy Thomas told the Reno Gazette-Journal.

"I can't get it out of my head."

She and her husband, like others in the Mogul and Somersett neighborhoods, packed up a few belongings and went to stay with friends or relatives.

Nevada is the third most seismically active state in the nation behind California and Alaska. Reno's last major quake measured 6.1 on April 24, 1914.

Earthquake magnitudes are calculated according to ground motion recorded on seismographs. An increase in one full number - from 6.5 to 7.5, for example - means the quake's magnitude is 10 times as great.

A quake with a magnitude of 6 can cause severe damage, while one with a magnitude of 7 can cause widespread, heavy damage.

---

On the Net:

UNR Seismological Laboratory: http://www.seismo.unr.edu

U.S. Geological Survey: http://quake.wr.usgs.gov/recenteqs/latestfault.htm


The data at UNR.edu is particularly interesting. This might be explanatory http://en.wikipedia.org/wiki/Gutenberg-Richter_Law
 

BobCav

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Thanks Doug. Diane is the same scientist I spoke to when I sent in mypattern data. It looks like the Gutenberg-Richter law is holding true.

Yesterday we had two 3.2's and a 3.1 with a smaller number of lesser ones and the night was relatively quiet. This morning there are a fewgrumblings. There were reports on the news last night where a large number of people have been concerend with volcanic activity and the experts tried to calm everyone's fears by explaining that if it were magma related there would be other indicators such as an increase in hot-spots, vents, new hot springs, increase in known hot spring temps, etc and none of that has occurred yet.
 

Sa45auto

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Bob all kidding aside.

The earth's crust is made up of large plates. Forces within the earth move these plates in respect to each other.

This movement builds up stress within the rocks of those plates.

The release of this stress occures along breaks called faults.

In general this release can occure as a lot of little movements (earthquakes) which is the good way, or buildup and occure as a very big earthquake, which is bad.

Be greatful it is occuring as a lot of little ones. ;)
 

BobCav

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Oh I am and thanks! I have a layperson's understanding of plate tectonics and those forces and a deep thirst for knowledge and an insane curiosuty for all things scientific. The seismologists are still puzzled because you typically see a larger temblor followed bysmaller aftershocks. But herethe smaller foreshocks are preceeding the larger ones. The thing that's puzzling them is that the intensity of both the foreshocks and larger quakes seemed to be increasing rather than decreasing, just the opposite of what is considered to be "the norm".

But as they've openly admitted they have no clue if we'll have a big one and their best advice is to be prepared. They understand the how and why but the when is anybody'sguess.
 

BobCav

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Citizen wrote:
BobCav wrote:
SNIP More likely that God revealing His Power and Wrath...

Bob,

Are you sure He's not just telling you to change your religion to "Shaker?" :)

You know...perhaps He is! And since I've been moving around, that would make me a....



Mover and Shaker!! :celebrate:monkey



Get it?
 

Citizen

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Hey, Bob!!!

You can come back to VA now.

It will seem a lot like Reno!

Annandale, Springfield, and Falls Church had a little shake at about 1:30 pm.

WTOP radio's website is reporting (for what that is worth) magnitude 2-3.0.
 

Dutch Uncle

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BobCav,
My brother, sister and elderly mother live in Reno, so they have been keeping me informed about the earth's recent misbehavior. Before the first big one, my mother said both the cat and the dog ran into her bedroom and jumped on the bed together. She didn't know what had gotten into them until about 2 minutes later when all Hell broke loose. Now everyone sleeps with a pair of shoes next to the bed and a bag packed with essentials and emergency supplies. My mother doesn't keep a gun with her anymore. At 91, she leaves that stuff up to "the kids". My sister, with whom she lives, has a CCW and a couple of pistols, so I guess she knows to take them if need be. Just the same, I think I'll email her about that.

Maybe when St. Albert and Fat Teddy are done with Globull Warming, they can try to take on earthquakes. (Nahhh, they'll just start by raising our taxes for "studies".)

Hang in there, bud. You'll have a bunch of stories to tell us if/when you move back to Ol' Virginny. We're all hoping you come through this OK.

Dutch Uncle
 

BobCav

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Dutch Uncle wrote:
BobCav,
My brother, sister and elderly mother live in Reno, so they have been keeping me informed about the earth's recent misbehavior. Before the first big one, my mother said both the cat and the dog ran into her bedroom and jumped on the bed together. She didn't know what had gotten into them until about 2 minutes later when all Hell broke loose. Now everyone sleeps with a pair of shoes next to the bed and a bag packed with essentials and emergency supplies. My mother doesn't keep a gun with her anymore. At 91, she leaves that stuff up to "the kids". My sister, with whom she lives, has a CCW and a couple of pistols, so I guess she knows to take them if need be. Just the same, I think I'll email her about that.

Maybe when St. Albert and Fat Teddy are done with Globull Warming, they can try to take on earthquakes. (Nahhh, they'll just start by raising our taxes for "studies".)

Hang in there, bud. You'll have a bunch of stories to tell us if/when you move back to Ol' Virginny. We're all hoping you come through this OK.

Dutch Uncle

Thanks Dutch, we're fine and plan to remain that way! We were woke last night at 1:44 by a 2.5,again at 3 AMbya 2.6 and nudged a bit by a 2.0 at 4 AM, all about 2.5 miles from us. Barely felt a tiny one earliter this morning too.The problem with these is that they're only a couple KM deep so you feel them more than a deeper one. They're saying we've had over 600 >1.0 in the last 2 weeks. Thank the Lord the 4.7 only knocked the pictures crooked and a few things off the back of the stove. We have a bag with extra clothes, food, water and ammo already in the car and have an emergency bag in arms reach, just in case. They're still calling for a bigger one and the smaller ones keep increasing.

I'll certainly keep your family in our prayers as well and I hope they come out of all of this no worse for the wear.
 
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