| − | Pertaining to [[earthquake]]s or [[earth]] [[vibration]]. <ref>[http://vulcan.wr.usgs.gov/Glossary/volcano_terminology.html Glossary of Volcano and Related Terminology]</ref>
| + | '''Seismicity''' pertains to [[earthquake]]s or [[earth]] [[vibration]]. <ref>[http://vulcan.wr.usgs.gov/Glossary/volcano_terminology.html Glossary of Volcano and Related Terminology]</ref> |