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Whats with the orphan pages? More links added.
A scientific instrument that detects and records vibrations (seismic waves) produced by earthquakes. <ref>[http://vulcan.wr.usgs.gov/Glossary/volcano_terminology.html Glossary of Volcano and Related Terminology]</ref>
A scientific [[instrument]] that detects and records [[vibration]]s ([[seismic wave]]s) produced by [[earthquake]]s. <ref>[http://vulcan.wr.usgs.gov/Glossary/volcano_terminology.html Glossary of Volcano and Related Terminology]</ref>
==References==
==References==
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