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Magnetometer |
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June 24, 2007 |
A magnetometer is a scientific instrument
used to measure the strength of magnetic fields. Earth's magnetism varies
from place to place and differences in the Earth's magnetic field (the magnetosphere)
can be caused by a couple of things:
- The differing nature of rocks
- The interaction between charged particles from the sun and the magnetosphere
Magnetometers are
used in geophysical surveys to find deposits of iron because they can measure
the magnetic pull of iron. Magnetometers are also used to detect archeological
sites, shipwrecks and other buried or submerged objects.
A magnetometer can
also be used by satellites like GOES to measure both the magnitude and direction
of the earth's magnetic field.
Magnetometers are
very sensitive, and can give an indication of possible auroral activity before
one can even see the light from the aurora.
From : http://spider.irf.se/mag/
X: Black | Y: Red | Z: Green
The plot shows the
deviation from the expected means of the three components of the geomagnetic
field. Click on the plot for a 10 second update version. The 45 day predictions
from Boulder. 3-day forecast from NOAA. A small description and more on the
real time data.
Other magnetometer data
Pulsation Measurements
Total Field Measurements
Lycksele magnetometer
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