Entry: Seismic moment
URI: https://terra-vocabulary.org/ncl/FAIR-Incubator/earthsciencevariables/c_c590997e
The magnitude of the component couple of the double couple that is the point force system equivalent to a fault slip in an isotropic elastic body. It is equal to rigidity times the fault slip integrated over the fault plane. It can be estimated from the far- field seismic spectrum or waveform fitting at wavelengths much longer than the source size. It can also be estimated from the near-field seismic, geologic and geodetic data, and the consistency among various observations. This was first demonstrated for the Niigata, Japan, earthquake of 1964, supporting quantitatively the validity of the fault origin of an earthquake. Also called “scalar seismic moment” to distinguish it from moment tensor.
Core metadata
| is a | Concept | observable property |
| submitted by | Viqui Agazzi |
| accepted on | 13 Nov 2023 11:25:39.827 |
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All metadata properties
| date accepted |
13 Nov 2023 11:25:39.827
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| date submitted |
13 Nov 2023 10:22:12.993
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| definition |
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| item class |
Concept
| observable property
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| label |
Seismic moment
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| notation |
c_c590997e
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| register |
earthsciencevariables
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| status |
status experimental
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| submitter |
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| type |
register item
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| version info |
2
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Definition
| alt label |
Mo
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| broader |
Solid earth
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| definition |
The magnitude of the component couple of the double couple that is the point force system equivalent to a fault slip in an isotropic elastic body. It is equal to rigidity times the fault slip integrated over the fault plane. It can be estimated from the far- field seismic spectrum or waveform fitting at wavelengths much longer than the source size. It can also be estimated from the near-field seismic, geologic and geodetic data, and the consistency among various observations. This was first demonstrated for the Niigata, Japan, earthquake of 1964, supporting quantitatively the validity of the fault origin of an earthquake. Also called “scalar seismic moment” to distinguish it from moment tensor.
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| exact match |
c 4a19f4bd
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| in scheme |
Earth science variables
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| pref label |
Seismic moment
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| type |
Concept
| observable property
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