ARLA/CLUSTER: Medir as Tempestades Geomagneticas com um Magnetometro Raspberry Pi

[João Costa > CT1FBF]

Measuring a geomagnetic storm with a Raspberry Pi magnetometer

Ciarán Beggan of the British Geological Survey describes how a network
of 9 Raspberry Pi magnetometers were deployed to schools around the UK
to measure geomagnetic storms

As computers such as the Raspberry Pi and geophysical sensors have
become smaller and cheaper it is now possible to build a reasonably
sensitive system which can detect and record the changes of the
magnetic field caused by the Northern Lights (aurora).

Though not as accurate as a scientific level instrument, the Raspberry
Pi magnetometer costs around 1/100th the price (about £180 at 2019
prices) for around 1/100th the accuracy (~1.5 nanoTesla). However,
this is sufficient to make interesting scientific measurements.

During 2017, a network of 9 Raspberry Pi magnetometers were deployed
to schools around the UK from Benbecula to Norwich. On September 8,
2017 a large geomagnetic storm was captured by the school
magnetometers. Using these data and the array of other magnetometers
around the North Sea, we were able to recreate the spatial and
temporal changes of the magnetic field during the storm in great
detail. The two phases of the storm show the westward (night time) and
eastward (daytime) flow of the auroral electrojet currents in the
ionosphere.

Source http://www.mist.ac.uk/nuggets

Download the paper Building a Raspberry Pi school magnetometer network in the UK
https://www.geosci-commun.net/1/25/2018/gc-1-25-2018.pdf