6. Glossary

Abbreviations, acronyms, and initialisms used in this report

ANSS

Advanced National Seismic System: A USGS initiative to provide seismic monitoring for at-risk regions of the United States

California EMA

The California Emergency Management Agency (formerly the California Office of Emergency Services)

DYFI

Did You Feel It? – The USGS system for gathering seismic intensity data from the public.

EHP

USGS Earthquake Hazard Program

ENS

Earthquake Notification System: earthquake notifications via text/email from USGS’s Earthquake Hazard Program

FEMA

Federal Emergency Management Agency: part of the U.S. Department of Homeland Security

GIS

Geographic Information System

GMICE

Ground-Motion–Intensity Conversion Equation

GMPE

Ground-Motion Prediction Equation

GSM

Global ShakeMap

HAZUS

HAZards US: a loss-estimation program developed by FEMA

IM or IMT

Intensity Measure (Type): often used as a generic reference to Peak Ground Motions

IPE

Intensity Prediction Equation

ISO

International Standards Organization

MMI

Modified Mercalli Intensity

NEIC

the National Earthquake Information Center; part of the USGS, located in Golden, Colorado

PAGER

Prompt Assessment of Global Earthquakes for Response

PGA

Peak Ground Acceleration

PGM

Peak Ground Motion: a generic term for PGA and PGV

PGV

Peak Ground Velocity

SA

Spectral acceleration; SA(1.0) represents spectral acceleration at a period of 1.0 s.

USGS

the United States Geological Survey, a bureau of the U.S. Department of the Interior.