![]() ![]() Practical limitations can also hamper scientists' understanding of volcanoes: Sometimes magma doesn't move enough to be detected, and other times, noise from different geological processes (including background seismicity from faults) dwarfs the signal from the magma. However, most research focuses on a few Cascade volcanoes that have already been well characterized. Seismic data, tiltmeter readings, and information from satellites can reveal ground deformations that indicate magma is moving beneath the surface. Wieser and colleagues report in a recent review published in Geochemistry, Geophysics, Geosystems.
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