static on AS-1

[STKS]

Can anyone tell me why the static on my machine is getting more and more, ie the lines are getting thicker since yesterday at about 16:00. If you look at my real time display and the one in OK and KWKS we are all picking up some heavy static. Any ideas on what it might be? THanks

[STKS]

Actually if you look at the real time display page several have started picking up static in the last 10-12 hours. Does this mean that the plates are building up to something?

[tkb]

Hi,

My first question would be have there been any weather changes since the time that you have noticed the change in background noise? In the Pacific Northwest, we have had a large storm move through the last few days, and my noise has increased dramatically (as the high winds shake my house). When I lived in Indiana, the weather changes were also quite pronounced in rather interesting ways (freezing of the ground, etc..).

It is always a great idea to compare your records to those nearby to rule out any electronic problems, so great job! We are working every day to get more schools displaying online, so if anyone needs help, please email sishelp@iris.edu!

Tammy

[OSOR]

Folks,

When I see a lot of noise on my seismometer I go to the website at http://www.oceanweather.com/data/. You can click on areas of the ocean and see the wave heights. On the West coast now there are 20 to 30 foot waves and my seismometer is going nuts at http://oregonshakes.com/Seismographs/LWC/LWCseis.html.

We had a class project a couple years ago where the kids did a correlation between wave height and noise on the seismometer. We looked at historical wave heights at an offshore buoy near us. You can go to http://www.oregonshakes.com/Earthquakes ... ide12.html to see a graph of the results.

Note that you do NOT have to live on the coast to have ocean noise on your seismometer. Even interior states like Illinois and Indiana frequently see this noise.

Kay Wyatt