Converter
ordinal effects/intensity scale
Modified Mercalli Intensity
reference-only
- Record
- M669
- Definition quality
- Historically documented
- Conversion mode
- reference only
- Calculator
- Reference table only
Definition
Modified Mercalli Intensity ranks observed effects at a location using Roman numerals and has no mathematical basis.
History & use
One earthquake has one source magnitude but many intensities distributed by location.
Modern use
Modern use is context-dependent and varies by region or measurement system.