These are local or significant earthquakes as detected by the MVGS RaspberryShake 3D seismometer.
Japan February 2021
Fukushima M7.1: Feb 13th 2021 14:08 UTC
A big quake from 60km depth. No sign of an S-wave but a big P-wave response that went on for at least 2 or 3 minutes. Bandpass filtered between 1 and 5 Hz.
Croatia December 2020
Petrinja M6.4: Dec 29th 2020 11:20 UTC
A big quake from 1,389km away and 10km depth that took about three minutes to reach us and lasted at least six minutes (in the Mole Valley, at least). It was accompanied by many, many aftershocks and at least a couple of significant pre-shocks. Of these, only 4 quakes above M4.5 have been observable on our seismometer. The recording is bandpass filtered between 1 and 8 Hz.
Switzerland October 2020
Steinibach M4.3: Oct 25th 2020 19:35 UTC
Bandpass filtered (1-10 Hz) vertical (Z) and horizontal traces (N-S & E-W).
Lincolnshire October 2020
Lincoln M2.5: Oct 21st 2020 02:49 UTC (depth 230 km !)
Bandpass filtered (3-8 Hz) vertical (Z) and horizontal traces (N-S & E-W).
Southern North Sea October 2020
Southern North Sea M2.6: Oct 5th 2020 03:26 UTC
Bandpass filtered vertical (Z) and horizontal traces (E-W & N-S). First arrivals of P-waves and S-waves are marked.
Pyrenees September/October 2020
Pyrenees near Pamplona, Spain M4.3.: Oct 1st 2020 00:21 UTC
Bandpass filtered vertical (Z) and horizontal traces (E-W & N-S). First arrivals of P-waves and S-waves marked.
Jersey Earthquake September 2020
Jersey M2.8: Sep 16th 2020 02:39 UTC
Bandpass filtered vertical (Z) and horizontal traces (E-W & N-S).
Leighton Buzzard Earthquakes September 2020
Leighton Buzzard M3.5: Sep 8th 2020 09:45 BST (= 08:45 UTC)
The first of the Leighton Buzzard earthquakes was quite large and stood out from the background noise on the day's seismogram.
Leighton Buzzard M3.5: Sep 8th 2020 08:45 UTC
Raw vertical trace (blue background) and bandpass filtered vertical (Z) and horizontal traces (E-W & N-S). See "Introduction to MVGS Earthquake Monitoring" in "Earthquakes and Seismograms" for interpretation.
Leighton Buzzard M2.1: Sep 13th 2020 23:21 UTC
Bandpass filtered vertical (Z - blue background) and horizontal (E-W and N-S) traces.
Leighton Buzzard M3.0: Sep 22nd 2020 08:32 UTC
Raw vertical trace (blue background) and bandpass filtered vertical (Z) and horizontal traces (E-W & N-S).
Leighton Buzzard M2.1: Sep 22nd 2020 12:39 UTC
Bandpass filtered vertical (Z) and horizontal traces (E-W & N-S).
Comparison of vertical (Z) responses for first four Leighton Buzzard earthquakes
Traces are all plotted at the same scale, clearly showing the differences in magnitude between the four quakes: Top: M3.5 2nd: M2.1 3rd: M3.0 Bottom: M2.1
