Richter magnitude scale

E12175
logarithmic scale scientific measurement scale seismic magnitude scale

The Richter magnitude scale is a logarithmic scale used to quantify the amount of seismic energy released by an earthquake based on instrumental measurements.

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All labels observed (4)

Label Occurrences
Richter magnitude scale canonical 12
Richter scale 2
Richter magnitude scale for large earthquakes 1

Statements (48)

Predicate Object
instanceOf logarithmic scale ⓘ
scientific measurement scale ⓘ
seismic magnitude scale ⓘ
alsoKnownAs Richter magnitude scale ⓘ
surface form: Richter scale

local magnitude scale ⓘ
appliesTo local earthquakes ⓘ
assumes similar attenuation characteristics as Southern California ⓘ
basedOn instrumental measurements ⓘ
maximum amplitude of seismic waves ⓘ
calibratedFor 100 km epicentral distance ⓘ
shallow earthquakes ⓘ
category logarithmic intensity scales in earth sciences ⓘ
comparedWith Modified Mercalli intensity scale ⓘ
surface form: Mercalli intensity scale
definedUsing Wood–Anderson torsion seismometer ⓘ
developedBy Beno Gutenberg ⓘ
Charles Francis Richter ⓘ
differenceFrom Mercalli intensity scale measures observed effects, not energy ⓘ
domain earthquake engineering ⓘ
geophysics ⓘ
field seismology ⓘ
influencedBy earlier magnitude concepts of Beno Gutenberg ⓘ
limitation less accurate for very large earthquakes ⓘ
region-dependent calibration ⓘ
logarithmBase 10 ⓘ
lowerLimit negative magnitudes possible for very small events ⓘ
measures earthquake magnitude ⓘ
seismic energy release ⓘ
namedAfter Charles Francis Richter ⓘ
oftenConfusedWith moment magnitude scale ⓘ
originallyDefinedFor Southern California ⓘ
property each whole number step corresponds to about 31.6 times more energy release ⓘ
each whole number step represents tenfold increase in wave amplitude ⓘ
publicationYear 1935 ⓘ
quantifies size of seismic events ⓘ
range approximately 0 to 9 and above ⓘ
regionSpecific Southern California crustal structure ⓘ
relatedTo seismic moment ⓘ
seismograph readings ⓘ
scaleType base-10 logarithmic ⓘ
status largely obsolete for modern large-earthquake reporting ⓘ
stillUsedFor historical earthquake records ⓘ
public communication ⓘ
supersededBy moment magnitude scale ⓘ
surface form: Mw scale

moment magnitude scale ⓘ
symbol ML ⓘ
unit magnitude unit (dimensionless) ⓘ
usedFor comparing earthquake sizes ⓘ
earthquake cataloging ⓘ

Referenced by (16)

Full triples — surface form annotated when it differs from this entity's canonical label.

Modified Mercalli intensity scale → differentFrom → Richter magnitude scale ⓘ
Richter magnitude scale → alsoKnownAs → Richter magnitude scale ⓘ
this entity surface form: Richter scale
Mercalli → differentFrom → Richter magnitude scale ⓘ
subject surface form: Mercalli intensity scale
Charles Francis Richter → notableWork → Richter magnitude scale ⓘ
Charles Francis Richter → developed → Richter magnitude scale ⓘ
Wood–Anderson torsion seismometer → hasKeyRoleIn → Richter magnitude scale ⓘ
Wood–Anderson torsion seismometer → formsBasisOf → Richter magnitude scale ⓘ
this entity surface form: original Richter magnitude scale
Wood–Anderson torsion seismometer → relatedTo → Richter magnitude scale ⓘ
this entity surface form: Richter scale
moment magnitude scale → replaced → Richter magnitude scale ⓘ
this entity surface form: Richter magnitude scale for large earthquakes
Beno Gutenberg → notableWork → Richter magnitude scale ⓘ
Beno Gutenberg → coDeveloperOf → Richter magnitude scale ⓘ
Richter → notableWork → Richter magnitude scale ⓘ
subject surface form: Charles Francis Richter
surface-wave magnitude scale → comparedWith → Richter magnitude scale ⓘ
Gutenberg–Richter law → relatedTo → Richter magnitude scale ⓘ
Francis → knownFor → Richter magnitude scale ⓘ
subject surface form: Charles Francis Richter
Overpeck, Ohio, United States of America → notableFor → Richter magnitude scale ⓘ
subject surface form: Charles Francis Richter