Noise on a seismometers and geophones, a overview

28 Replies to “Noise on a seismometers and geophones, a overview”

1. If it is permitted to display this here Jon I have a page on my blog that may be of interest which is dedicated to the subject of understanding seismograms. It includes that GeoNet link.

   http://qvsdata.wordpress.com/learning-links/understanding-seismograms-and-earthquakes/

2. Nice to see the different patterns in the article.

   Is it still stormy weather in iceland because we don’t see any small earthquakes or is it really quit earthquake wise at the moment?

   1. It is just quiet time in earthquakes. No storm ongoing at the moment.

      1. Looks like that just changed:
         “A strong gale warning (more than 20 m/s), is in effect for the south part. Valid to 19.01.2011 18:00”
         http://en.vedur.is/earthquakes-and-volcanism/earthquakes/

3. I have finally updated the web store. 🙂

   I am going to add more later on, for U.S and Canada.

4. The quiet time continues and I am getting bored. :/

   1. Same here, now I have to focus on my math test and I can’t procrastinate studying by reading blogs and comments. 🙁

      By the way, there was a small quake swarm beneath Bárðarbunga yesterday, which was relatively interesting in the way that few of the quakes were around 20km depth.

      1. There is more going on at Bárðarbunga then meets the eye. I am looking into it and hope to blog about it later tonight.

      2. I’m very interested, because it has always intruged me that there are and have been so many (strong) quakes beneath Bárðarbunga without any other visible signs of activity. The only explanation I could come up with is the fact that the Icelandic hotspot is centered beneath this part of Vatnajökull, but that’s all.
         Thanks for writing Jón! 🙂

      3. Or perhaps lots of dykes forming?

      4. Yeah I think that could be one of the effects of the center of the plume could have.

5. Depth vs Time from MET data – Vatnajökull page

   http://i53.tinypic.com/10mpilu.png

   1. @Lurking:
      Good grief, Iceland is not collaborating to your plotting.
      Not enough events to put on the plot in order to get a concrete idea of what is going on, which means that either not much is going on, or that something huge is about to happen.
      My guess goes to the former. And I hope I’m wrong.
      Keep them going, pal. We’re happy that you are still motivated.:)

   2. Well, I usually pull about a months worth of quakes in the plots… this was just what appeared on the MET site to get an idea of what the general trend is.

      Lately, with the ping-pong activity, I don’t really know where to focus my attention at.

      As for motivation… the one I’m trying to get motivated to do is the re-creation of the SIL moment-tensor for Grimvotn. If I can nail that then I have it licked. I’m just sort of dreading doing it. Though I have what it probably a good formula, I just know that oddball spike is gonna show up and throw my graph off.

      I’m thinking that SIL smoothed that event and calculated it down to something sane. It was a large cluster and it drops a few orders of magnitude of energy to the data… well, my data. Theirs doesn’t have that problem.

      1. @Lurking:
         You must speed up with your formulas.
         Looks like we might be up for an eruption in Grimsvötn sometime soon.

6. Looks like there is a nice swarm going on right now near Krisuvik.
   http://en.vedur.is/earthquakes-and-volcanism/earthquakes/reykjanespeninsula

7. Yeah, at last, some action is underway.
   Lurking, get ready and lubricate your fingers!

8. They are all poorly appraised. May be the picture will change in a while.
   Interesting the fact that depths are all between 4-6 km.

   1. Eh… remember they are poorly located.

      But this is how they lay.

      http://i55.tinypic.com/ajow3q.png

      And vs time,

      http://i55.tinypic.com/9bkf9g.png

      So, remember that they may move around as the data gets better analysis.

9. Somebody spilled maple syrup on Hekla’s webcam!

   1. Looks like a tornado to me.

      1. Don’t think so, it’s stagnant. ;D
         My first guess would also be maple syrup.
         Second guess, mayby ice. But I’ll go with maple syrup.

      2. In that case, I’ll have pancakes.

      3. Nhammmm! And waffles…

10. Weather picture of Iceland at 13:33 UTC yesterday.

    http://esv.blog.is/users/da/esv/img/20110117_1333.jpg

    Picture is by MODIS.

    1. Cool image.

       1. COLD image, you mean.
          That’s where Iceland has taken its name from. 😉

11. A new blog post is up. 🙂

Comments are closed.