- American Red Cross
- Cal Fire
- California Emergency Management Agency
- Citizen Corps/ CERT
- FEMA
- The Great California ShakeOut
- Humboldt Amateur Radio Club
- Humboldt County Dept. of Public Health
- Humboldt County Office of Emergency Services
- Living on Shaky Ground Website
- National Weather Service
- prepare.org
- Redwood Coast Tsunami Work Group
- West Coast/Alaska Tsunami Warning Center
