************************************* Jón Frímann <jonfr@xxxxxxxxx> ************************************* Hi I am an amature in recording earthquakes and monitoring volcanoes. I was advised by one member of the PSN group to contact you about this occurrence that I have seen in regards of a volcano called Katla (Myrdalsjokull) in Iceland. Here is the orginal message to the PSN group. ------ Hi all My new station at Borgarnes is close enugh to record earthquakes from the Myrdalsjokull Volcano (http://www.volcano.si.edu/world/volcano.cfm?vnum=1702-03=). I have already recored a few earthquakes from that volcano. But most of them are small, from mag 1.5 to 2.2 on the Ricther scale. But most of those earthquakes have strange characteristics that I have known about for years, but have never been able to understand or see before. Most of these earthquakes have frequencies that go down to 1Hz and lower. Based on the poor recordings I got, there appears to be small tremor noise (magma moving?) following the earthquakes. But because of how the poor current recordings are, that is unconfirmed at the moment. Any suggestions on what I am looking at are welcomed. Since I am unsure what is going on in the Myrdalsjokull (Katla) Volcano. But it is known that the Myrdalsjokull Volcano has been warming up for a long time now and is ready to blow at any time. ----- I have contacted the Icelandic met office in the past about these earthquakes, since I have known about this for few years, they also know about this. But they are no closer then I to understanding what creates these low frequency earthquakes. They have theories about the earthquake passing trugh a layer of magma or a pocket of magma. But this still is a mistery to me. I got a 4.5Hz sensor located in a town called Borgarnes, the distance to Katla is about ~110 km. As it stands, Katla is quiet at the moment as I see it. The volcano next to it, called Eyjafjallajokull (http://www.volcano.si.edu/world/volcano.cfm?vnum=1702-02=) is also quiet. Thanks for your help. Regards. -- Jón Frímann http://www.jonfr.com http://www.simnet.is/jonfr500/earthquake/ ============================================================== To unsubscribe from the volcano list, send the message: signoff volcano to: listserv@xxxxxxx, or write to: volcano-request@xxxxxxxx To contribute to the volcano list, send your message to: volcano@xxxxxxxx Please do not send attachments. ==============================================================
