| 1. | Each ring consists of an odd number of seismometer sites.
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| 2. | The SP seismometer displayed reduced sensitivity at low signal levels following deployment.
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| 3. | The seismometer picked up periodic swarms of energy coming from the nearby seafloor.
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| 4. | The Han dynasty was an astronomy, and a seismometer employing an inverted pendulum.
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| 5. | The seismometer capsule was also painted with a sawtooth pattern for better thermal protection.
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| 6. | Tiltmeters have a long history, somewhat parallel to the history of the seismometer.
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| 7. | Unlike the continually recording seismometer, accelerometers nearly always work in a triggered mode.
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| 8. | The primary onboard instrument was a seismometer.
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| 9. | The tiny transmitter in the seismometer capsule continued sending out a 50-milliwatt signal.
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| 10. | The Volcanological Observatory there did not get its first seismometer until some three years later.
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