Quake Watch 2011

reply to post by Agarta


I'll post a good article to read. Yes, lots of salt production is from big giant mines. But not all salt production is from mines. Some is drilling and water injected. In the case of Youngstown, since it is a salt spring, they may be pumping in water to speed up the natural process. You can see the site just to the north of the epicenter.

And I said that it could be a mine collapse. Could be a coal mine. Heck, some of the Canadian quakes could be explosive detonations in the mines. Nearly a third of all Canadian siesmic events are mining activities.

ech.cwru.edu...

"Salt is recovered from subsurface deposits either by injecting fresh water down to the rock unit, and then pumping the brine mixture back to the surface for processing, or by mining the hard rock formation to get to the halite deposits."

reply to post by Robin Marks


Thanks for the info I will definitely do some studying.

Here's the Kazakhstan earthquake in Central Asia. It's seems to make my point more valid. We are causing lots of siesmic events. If you look on the Google map, you will notice the epicenter is directly on top a a mining operation. Looks like they are blowing up mountains.

earthquake.usgs.gov...

reply to post by Robin Marks


From your link

In his masters thesis, Michael J. Clifford analyzes the feasibility of injection pumps returning brine into rock units after rock salt mining in Cleveland. ..............The company began considering other means of brine disposal, filed for a permit, and was granted one in June of 1971. With this permit, an observation well that had been drilled to the Oriskany Sandstone in 1959 was converted to a brine disposal well. The brine was pressure injected into the porous unit after filters and a pump were installed in May of 1972. Injection pressure is limited to fifteen gallons per minute into the unit at a pressure no more than fifty pascals per square inch. Since non-fresh water fluid injection is practiced in other units in Ohio as well, brine injection seems a minor threat to wells accessing the Oriskany Sandstone aquifer. Other wastes disposed by pressure injection are pickling liquors and phenols from steel productions, radioactive liquids, mixed organic such as plastics and insecticides, and other liquids which are expensive to treat in surface facilities, or for which no treatment is known with current technology.

However it is put it is pressure injection!

And I said that it could be a mine collapse. Could be a coal mine. Heck, some of the Canadian quakes could be explosive detonations in the mines. Nearly a third of all Canadian siesmic events are mining activities.

Do you have a link for that by any chance?

reply to post by PuterMan


Here's the link. And I made a mistake. The database includes the mining and construction events. I thought they were part of the total and not separate.

earthquakescanada.nrcan.gc.ca... 50

I just had a horrible thought. What's going to happen when there's and earthquake that allows for this injected water to travel back up to the surface?

I should really just stop thinking.

There was a small (1.6) Quake in New Hampshire today too. Very odd places these things are popping up in.

* This event has been reviewed by a seismologist.

Magnitude 3.7
Date-Time

* Friday, March 18, 2011 at 19:54:46 UTC
* Friday, March 18, 2011 at 12:54:46 PM at epicenter
* Time of Earthquake in other Time Zones

Location 34.818°N, 112.150°W
Depth 5 km (3.1 miles) set by location program
Region ARIZONA
Distances 36 km (22 miles) W of Sedona, Arizona
42 km (26 miles) NE of Prescott, Arizona
61 km (37 miles) SW of Flagstaff, Arizona
152 km (94 miles) N of PHOENIX, Arizona
Location Uncertainty horizontal +/- 12.8 km (8.0 miles); depth fixed by location program
Parameters NST= 69, Nph= 71, Dmin=79 km, Rmss=1.16 sec, Gp= 36°,
M-type=local magnitude (ML), Version=5
Source

* USGS NEIC (WDCS-D)

Event ID usc0002651

Watching the Greece/Turkey area....there is a strong swarm of small quakes and lots of them. Definately an area to watch very closely over the next couple of days or so.

Maybe our Quake Nerds would like to look into it

Did the Earth Shake in St. Augustine this Morning?

reply to post by Shenon


If the seismograms didn't pick it up, it could have been very shallow and localized. That's as far as I'll go with it. It is odd though.

reply to post by PuterMan


Cheers Puterman

I don't know if this has been posted in some other thread on ats, but here's an article posted today about Cascadia subduction zone. might be of interest

www.economist.com...

The common view is that there is a one-in-seven chance of an earthquake of magnitude 9.0 or higher occurring along the Cascadia subduction zone within the next 50 years. More recent studies suggest the probability of that happening is more like one-in-three.

reply to post by PuterMan


I know Turkey always seems to be grumbling, and the quakes are usually small, but if you've done Turkey's plot would you confirm that earthquake frequency is not changing please?

reply to post by inthemistandfog


Would you mind going over to Westcoast's thread on Washington State and sharing that? I believe it's information she would really like to see, along with the other followers of that thread.

ATS Thread - What Might Really Be Happening In Wahsington State

OK - just got settled in - now in PA and got signed on - things are for sure bouncing all over - and what is this?

Magnitude 3.7
Date-Time Friday, March 18, 2011 at 19:54:45 UTC
Friday, March 18, 2011 at 12:54:45 PM at epicenter
Time of Earthquake in other Time Zones

Location 34.859°N, 112.072°W
Depth 4.9 km (3.0 miles) set by location program
Region ARIZONA
Distances 36 km (22 miles) W of Sedona, Arizona
42 km (26 miles) NE of Prescott, Arizona
61 km (37 miles) SW of Flagstaff, Arizona
152 km (94 miles) N of PHOENIX, Arizona

Location Uncertainty horizontal +/- 7.9 km (4.9 miles); depth fixed by location program
Parameters NST= 72, Nph= 80, Dmin=75.7 km, Rmss=1 sec, Gp= 36°,
M-type=local magnitude (ML), Version=6
Source USGS NEIC (WDCS-D)


Event ID usc0002651

Arizona?

Maybe keep an eye on THIS area.

Magnitude
5.2
Date-Time
Friday, March 18, 2011 at 23:34:30 UTC
Saturday, March 19, 2011 at 08:34:30 AM at epicenter
Location
24.243°N, 125.279°E
Depth
34.1 km (21.2 miles)
Region
SOUTHWESTERN RYUKYU ISLANDS, JAPAN
Distances
111 km (68 miles) E of Ishigaki-jima, Ryukyu Islands, Japan
324 km (201 miles) SW of Naha, Okinawa, Japan
350 km (217 miles) E of Su'ao, Taiwan
1157 km (718 miles) NNE of MANILA, Philippines
Location Uncertainty
horizontal +/- 17.8 km (11.1 miles); depth +/- 1.6 km (1.0 miles)
Parameters
NST= 38, Nph= 38, Dmin=231.5 km, Rmss=0.58 sec, Gp=119°,
M-type=body wave magnitude (Mb), Version=5
Source
USGS NEIC (WDCS-D)
Event ID
usc00026e7

earthquake.usgs.gov...

reply to post by zenius


Steady as a rock!! Turkey 365 days cumulative.



Magnitudes look steady as well.



Looks OK over the short term (2 months) as well



By the way I just added Greece to the individual countries.

reply to post by PuterMan


Thanks for doing that, I don't know if it's the quakes or the unrest, but I have a bad feeling about that part of the world. I also have a bad feeling about the Tonga and NZ regions. I couldn't find any seismo for Tonga/Solomons but keeping an eye on the Geonet drums.

595 earthquakes on ugs right now. I don't recall the last time I saw that many at once.

5.2 2011/03/19 02:33:47 0.812 97.439 31.8 NIAS REGION, INDONESIA

Source

I just posted this on the Arkansas thread and am posting it here as well. According to Global Incident Map - SoCal just had about 13 or 14 small earthquakes in the last 30-40 minutes. I've never seen this before and am asking you experts if this is normal??

Did everyone go to bed early tonight??