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Seismometers measure seismic waves that travel through the earth. A magnetic mass is suspended between two coils. As seismic waves pass through the seismometer, the coils move, but the mass remains at rest because of its inertia. The movement of the coils relative to the magnetic mass induces an electric current that can be detected and plotted on a graphical interface.
Tiltmeters measure small changes in the tilt of the ground or of a structure. Tiltmeters are analogous to a highly sensitive carpenter's level with an electronic output.
Magnetometers measure changes in the Earth's magnetic field. Magnetometers can be used to monitor the effects of solar storms near the Earth. They can also be used to predict auroras.
Anemometers measure the velocity and direction of the wind at all five LIGO data stations.
MX
Vault
EX
MY EYLVEA
BASIC ADVANCED
1) Date of earthquake
2) Time of earthquake
3) Latitude of earthquake
4) Longitude of earthquake
5) Magnitude of earthquake
6) Depth of focus of earthquake
7) Distance to LIGO
8) Estimated travel time of earthquake waves (USGS travel time calculator or rule of thumb)
9) Actual travel time of earthquake waves
First determine your investigation level.
only
allows one channel to be plotted on a graph.
Both
and
allow for
multiple channels on one plot.
Map Plate boundaries.
Study earthquake wave propagation rates.
Graph earthquakes focus depth.
Changes in wave velocity based on rock types (Continental/Oceanic).
Compare earthquake intensity and depth.
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