What is a volcanic tremor?
Quick Answer
Volcanic tremor is continuous ground vibration caused by movement of magma, gas, or fluids inside a volcano. Unlike a sharp earthquake, it can persist for minutes, hours, or longer.
The Full Story
Volcanic tremor is a seismic signal that often sounds and looks different from regular tectonic earthquakes. It may reflect magma rising, gas moving through cracks, or pressurization within volcanic conduits. Because it can accompany eruptive activity, tremor is an important monitoring tool in volcano observatories. Persistent or increasing tremor can indicate that a volcano is becoming more active, though it does not always mean an eruption is imminent. Scientists use seismometers to track these subtle signals in real time.
Key Facts
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Suggested video title for this topic:
"The rumbling signal that can warn scientists a volcano is waking up"
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