Microearthquakes 2 : Natural Disaster. Earthquakes with magnitude of about 2.0 or less are usually call microearthquakes; they are not commonly felt by people and are generally recorded only on local seismographs
Natural and Environmental Disaster Information Exchange System NEDIES, European Commission, Directorate General Joint Research Centre (DG JRC), Institute for the Protection and Security of the Citizen (IPSC), Ispra (Varese) Italy, http://nedies.jrc.it/index.asp?ID=82#Top, US Geological Survey (USGS), Earthquake Hazards Program, Glossary of Earthquake and Related Terminology, USGS/Cascades Volcano Observatory, Vancouver, Washington, Washington, USA 2012. http://vulcan.wr.usgs.gov/Glossary/Seismicity/eart hquake_terminology.html, (ND/ Erthq - Amer) {165}