Modified Mercalli intensity scale

E2245

The Modified Mercalli intensity scale is a seismic scale that qualitatively measures the observed effects and damage of an earthquake on people, structures, and the Earth's surface.

Aliases (1)

Statements (49)
Predicate Object
instanceOf earthquake intensity scale
seismic intensity scale
appliesTo Earth's surface
people
structures
basedOn observed shaking
reported human perception
structural damage
category Earthquake scales
Seismology
characterizes local shaking severity
dependsOn building vulnerability
distance from epicenter
local ground conditions
developedFrom Mercalli intensity scale
differentFrom Richter magnitude scale
moment magnitude scale
doesNotMeasure total energy released by an earthquake
hasLevelDescription I: Not felt
II: Weak
III: Weak to light
IV: Light
IX: Violent
V: Moderate
VI: Strong
VII: Very strong
VIII: Severe
X: Extreme
XI: Extreme to catastrophic
XII: Catastrophic
hasMaximumValue XII
hasMinimumValue I
hasNumberOfLevels 12
measurementType qualitative
measures earthquake damage
earthquake intensity
observed effects of earthquakes
namedAfter Giuseppe Mercalli
usedBy United States Geological Survey
emergency managers
engineers
planners
usedFor describing earthquake effects at specific locations
historical earthquake analysis
mapping earthquake intensity distribution
post-earthquake damage assessment
usedIn earthquake engineering
seismology
usesRomanNumerals true

Referenced by (10)
Subject (surface form when different) Predicate
1906 San Francisco earthquake
1986 San Salvador earthquake
1992 Cape Mendocino earthquakes
intensityScale
Giuseppe Mercalli ("Mercalli intensity scale")
Giuseppe Mercalli ("Mercalli intensity scale")
knownFor
Richter magnitude scale ("Mercalli intensity scale")
comparedWith
Giuseppe Mercalli ("Mercalli intensity scale")
developed
Modified Mercalli intensity scale ("Mercalli intensity scale")
developedFrom
Mercalli ("Mercalli intensity scale")
hasNotableAssociation
Giuseppe Mercalli ("Mercalli intensity scale")
notableWork

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