Noise on a seismometers and geophones, a overview

A geophone and seismometers record a lot more then just earthquakes, they also record noise from all types of things. Most common is the wind, but also cars, people, animals and other things.

The GeoNet in New Zealand has put together a great guide on this noise sources.

This guide can be viewed here.

Seismic Monitoring of Volcanoes (

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

  1. 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. 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. 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! 🙂

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

    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.

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

  3. 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. 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.

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