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Waite (1999) identified 3156 earthquakes in the autumn 1985
swarm. However, using the relocated catalog, the swarm was found to
consist of only 462 earthquakes. From 1995 to 2006 the swarms
identified in this study become more similar to the swarms identified
by Waite (1999) in both the number of swarms and the total number
of earthquakes in each swarm. This is because the seismic network
upgrades improved the quality of the earthquake locations so that
more earthquakes made it through the relocation process.
The data used here are a subset of the high-precision data determined
by Husen and Smith (2004) of relocated hypocenters determined
using tomographically determined three-dimensional P-wave
velocity models for seismicity from 1973 to 2002. Hypocenters for the
later period, 2003–2006, were relocated using the velocity model for
the time period 1995–2002 of Husen and Smith (2004) and added to
the catalog providing a total of 29,336 earthquakes.
Originally posted by shutterbugw
Hi, I was logged in with my PS3, Don't think it worked for posting lol.
Well, I am New here and Shirakawa recommended me to here.
If this being the case then how can we judge accurately the size of the quakes? I realize that there is different depths as well.
and some of them have been really weird signals I understand that they are doing blasts in that area as well. is there an up date sight for the blasting? so that I won't miss represent a posting? and how do I know what ones to keep and what ones to let go?
I might be weird but, in my thought, it seams a quake causing a tiny fissure would enough to send this thing up.
Also if you guys think I should get rid of a video having to do with Yellowstone let me know. I want to give good information not misinformation.
Originally posted by crappiekat
Well I think know I understand some of what you guys are talking about. "Some rumbles are not being shown. A little over an hour ago usgs posted a 3.1 I had to dig for it. Then 2.9 which they did report but then the report for the 3.1 dissapeared. I'm new at this so I have missed something. I will go back and check. Does anyone else see this?
I am capable of understanding what that says actually.
To exploit the information in a seismogram to the fullest, one uses waveform tomography. In this case, the seismograms are the observed data. In seismic exploration, the forward model is usually governed by the acoustic wave equation. This is an approximation to the elastic wave propagation. Elastic waveform tomography is much more difficult than acoustic waveform tomography. The acoustic wave equation is numerically solved by some numerical schemes such as finite-difference and finite-element methods. Seismic waveform tomography can be efficiently solved by adjoint methods.
. Their own data denies this with a max of 93 quakes on one day not 200 on 2 days. I am merely pointing out that it seems to me that there is a discrepancy here somewhere.
Figure 3. The largest recorded earthquake swarm at Yellowstone occurred during the fall of 1985. There were about 3000 earthquakes over a three-month period. Over 200 events were recorded on two separate days during this time period.
. I have done so and I am quite able to spot a discrepancy in the promulgation of data thank you.
But please also read the rest in detail to better understand the context of these excerpts.
Originally posted by Shirakawa
I don't know if anybody noticed, but on the Yellowstone current earthquake list there's an automatically generated M2.2 (!) earthquake which is a bit north to the current swarm. I wonder if the activity we've seen in the last couple hours didn't occur there.
www.seis.utah.edu...
Originally posted by PuterMan
reply to post by Shirakawa
I have read that PDF. You have missed my point. They are still saying that 1985 was the largest swarm when in fact it was not. That accolade belongs to the current swarm. At 1662 quakes over 462 - no contest.
What is being put out for general consumption seems to be designed to my suspicious mind to allay any fears that this may be a significant event by pointing the finger at 1985 saying - oh look but that was much bigger so don't worry folks, everything is A OK. It is definitely not the same as that which under ordinary circumstances would not be accessed by the general public. But then we are not just your ordinary general public are we?
Originally posted by Anmarie96
reply to post by PuterMan
Not to but into a serious debate - but I think this portion says it all : What is being put out for general consumption seems to be designed to my suspicious mind to allay any fears that this may be a significant event - .
Look at the Lake issue i just raised (bun intentded)-
by the way - UofU is saying that last wave one quake was a 2.5 and the rest smaller - shollow depth -
Any thinking on this ongoing current situation
Originally posted by Shirakawa
I don't know if anybody noticed, but on the Yellowstone current earthquake list there's an automatically generated M2.2 (!) earthquake which is a bit north to the current swarm. I wonder if the activity we've seen in the last couple hours didn't occur there.
www.seis.utah.edu...