Ms 17 : Surface Wave Magnitude. Magnitude of an earthquake as measured from the amplitude of seismic surface waves. Often referred to by the media as "Richter" magnitude
City & County of San Francisco Emergency Operations Plan (ERP), Tsunami Response Annex Page 41, Attachment K (Glossary of Key Terms and Terminology), CA, USA 2011. http://www.sfdem.org/modules/ShowDocument.aspx?doc umentid=1115, (ND/ Tsunami Emr - Amer) {26}
City & County of San Francisco CCSF, An Element of the CCSF Emergency Management Program, Emergency Response Plan: Tsunami Response Annex, Attachment K: Glossary of Key Terms and Terminology, San Francisco, California, USA 2011. http://www.sfdem.org/Modules/ShowDocument.aspx?doc umentid=1115, (ND/ Tsunami Emr - Amer) {960}