Here are the webicorders from the geophones that I own. There might be noise on the webicorders as wind and human traffic is close to them. This can happen at random times and without warning. Most earthquakes that I record are also documented by Icelandic Met Office website. If an event appears on my geophone the location and magnitude of it can be found at Icelandic Met Office website in most cases. I only record 1 day or 24 hours worth of data on the webicorders. I keep the raw data for 160 days so I can check them later if needed.

About the geophones

This is 4.5Hz geophone and is from
Mark Products. This geophone has three axis. It has a East, West, North, South, Z (vertical) axis. Here are info about this type of geophone. Here  are technical info about this geophone, how sensitive it is and what frequencies it detects. Geophones are from Redwood City Public Seismic Network. It is no longer possible to buy this geophones. It is now possible to buy Raspberry Shake seismometers here.


To contact me please send email at volcano [at] jonfr.com with questions.

Websites about Iceland

Iceland geology

Web cameras of volcanoes in Iceland

Dellukot - Katla and Eyjafjallaj÷kull
Live from Iceland (MÝla)

Other seismometer monitoring networks

Other webicorder networks
Icelandic Met Office drumplots

Web sites about earthquakes around the world

Redwood City Public Seismic Network
The Icelandic Meteorological Office


Explanation of the tremor plot

Green line = no data recorded / coming in
Black line = normal data recorded
Red line = local earthquake recorded. Noise sometimes creates red spikes.
Orange line = Telesismic event has been detected.

B÷­varshˇlar, Iceland

Vertical channel (Z). Updated every 5 min.

Dellukot, Iceland
Stops in 2018 due to changes at hosting site.

Vertical channel (Z). Updated every 5 min.
Information on wind noise can be found here.
Noisy geophone station.

Alicante, Spain

Station starts in May 2019 (if there are no delays).

This is vertical channel (Z). Updated every 5 min.

This is an nosy station due to traffic from cars, trains and people. Lowest noise period between 00:00 - 05:00 CET/CEST.