Originally posted by getreadyalready
reply to post by PuterMan
I disagree. Yes, NE Arkansas gets a lot of New Madrid Activity, but the Activity near Searcy lately is very unusual. It is not associated with the
other fault, and it is blamed on a newly discovered fault line. Also, the shallowness of the activity means a lot more surface damage if they get a
With what are you disagreeing?
What you said above was the subject of the second link I posted. I was not disagreeing, but saying I have no further comment as the two links said
what I considered was needed to say.
If we take the 2.2 as a centre (35.232°N, 91.847°W) and extract ANSS data for a 15km circle we get first the parameters:
Your search parameters are:
* delta=0 km to 20 km from (35.232,-91.847)
Then the data
So yes I do agree that it is unusual - since there have been no quakes there in the past 10 years except the recent batch.
Would I be correct in assuming that there has been gas extraction from shale fields in the area?
Link to chamber of commerce
Note also that this document states:
Fractures are also induced by pumping pressurized fluids down the well bore to fracture the rock unit. These additional fractures enhance the
permeability of the Fayetteville Shale and allow more efficient gas production.
If you do this you are going to get quakes in the zone. There is another big zone - can't remember the name but it begins with B (it just came to me
Barnett Shale) - where this happens.
Disturbances in shale fields are noted when gas extraction is taking place. My question to you would be is this relatively recent?
These quakes would seem the right sort of size, but as to the sudden onset I don't know not being either in the area or a geologist by trade.
What I am trying to find is geological maps relating to these area but I seem to be able to find everything but! I will continue this when I have
Edit: I note you say that there is a newly discovered fault line. Do you have details of that?
This sounds like it may be an interesting investigation!
Links to helicorder displays
for the Arkansas Seismic Network.
[edit on 29/6/2010 by PuterMan]