1. S. Kaplan, Tolley’s Handbook of Disaster and Emergency Management: Principles and Best Practices; Disaster and Emergency Management Systems (Lexis Nexis, London, 2004)
2. Richter Scale/Mercalli Scale, https://www.usgs.gov/media/images/modified-mercalli-intensity-mmi-scale-assigns-intensities
3. Beaufort Wind Scale, https://www.spc.noaa.gov/faq/tornado/beaufort.html
4. Saffir-Simpson Hurricane Wind Scale, https://www.nhc.noaa.gov/aboutsshws.php
5. Fujita Tornado Damage Scale, https://www.spc.noaa.gov/faq/tornado/f-scale.html