Scaling relation between earthquake magnitude and the departure time from P wave similar growth
Abstract We introduce a new scaling relation between earthquake magnitude (M) and a characteristic of initial P wave displacement. By examining Japanese K‐NET data averaged in bins partitioned by Mw and hypocentral distance, we demonstrate that the P wave displacement briefly displays similar growth...
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| Format: | Article |
| Language: | English |
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Wiley
2016-09-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL070069 |
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| _version_ | 1850271865081167872 |
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| author | Shunta Noda William L. Ellsworth |
| author_facet | Shunta Noda William L. Ellsworth |
| author_sort | Shunta Noda |
| collection | DOAJ |
| description | Abstract We introduce a new scaling relation between earthquake magnitude (M) and a characteristic of initial P wave displacement. By examining Japanese K‐NET data averaged in bins partitioned by Mw and hypocentral distance, we demonstrate that the P wave displacement briefly displays similar growth at the onset of rupture and that the departure time (Tdp), which is defined as the time of departure from similarity of the absolute displacement after applying a band‐pass filter, correlates with the final M in a range of 4.5 ≤ Mw ≤ 7. The scaling relation between Mw and Tdp implies that useful information on the final M can be derived while the event is still in progress because Tdp occurs before the completion of rupture. We conclude that the scaling relation is important not only for earthquake early warning but also for the source physics of earthquakes. |
| format | Article |
| id | doaj-art-d1850feb99804113bac7eb4adbaba14c |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-09-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-d1850feb99804113bac7eb4adbaba14c2025-08-20T01:52:04ZengWileyGeophysical Research Letters0094-82761944-80072016-09-0143179053906010.1002/2016GL070069Scaling relation between earthquake magnitude and the departure time from P wave similar growthShunta Noda0William L. Ellsworth1United States Geological Survey Menlo Park California USAUnited States Geological Survey Menlo Park California USAAbstract We introduce a new scaling relation between earthquake magnitude (M) and a characteristic of initial P wave displacement. By examining Japanese K‐NET data averaged in bins partitioned by Mw and hypocentral distance, we demonstrate that the P wave displacement briefly displays similar growth at the onset of rupture and that the departure time (Tdp), which is defined as the time of departure from similarity of the absolute displacement after applying a band‐pass filter, correlates with the final M in a range of 4.5 ≤ Mw ≤ 7. The scaling relation between Mw and Tdp implies that useful information on the final M can be derived while the event is still in progress because Tdp occurs before the completion of rupture. We conclude that the scaling relation is important not only for earthquake early warning but also for the source physics of earthquakes.https://doi.org/10.1002/2016GL070069magnitudeearthquake early warningscalinginitial rupturenucleation |
| spellingShingle | Shunta Noda William L. Ellsworth Scaling relation between earthquake magnitude and the departure time from P wave similar growth Geophysical Research Letters magnitude earthquake early warning scaling initial rupture nucleation |
| title | Scaling relation between earthquake magnitude and the departure time from P wave similar growth |
| title_full | Scaling relation between earthquake magnitude and the departure time from P wave similar growth |
| title_fullStr | Scaling relation between earthquake magnitude and the departure time from P wave similar growth |
| title_full_unstemmed | Scaling relation between earthquake magnitude and the departure time from P wave similar growth |
| title_short | Scaling relation between earthquake magnitude and the departure time from P wave similar growth |
| title_sort | scaling relation between earthquake magnitude and the departure time from p wave similar growth |
| topic | magnitude earthquake early warning scaling initial rupture nucleation |
| url | https://doi.org/10.1002/2016GL070069 |
| work_keys_str_mv | AT shuntanoda scalingrelationbetweenearthquakemagnitudeandthedeparturetimefrompwavesimilargrowth AT williamlellsworth scalingrelationbetweenearthquakemagnitudeandthedeparturetimefrompwavesimilargrowth |