Did Short‐Term Preseismic Crustal Deformation Precede the 2011 Great Tohoku‐Oki Earthquake? An Examination of Stacked Tilt Records
Abstract The detection of preslip, occurring hours to days before a large earthquake, using geodetic measurements has been a major focus in earthquake prediction research. A recent study claims to have detected a preseismic signal interpreted as accelerating slip near the hypocenter of the 2011 grea...
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| Format: | Article |
| Language: | English |
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Wiley
2024-06-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL109384 |
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| author | Hitoshi Hirose Aitaro Kato Takeshi Kimura |
| author_facet | Hitoshi Hirose Aitaro Kato Takeshi Kimura |
| author_sort | Hitoshi Hirose |
| collection | DOAJ |
| description | Abstract The detection of preslip, occurring hours to days before a large earthquake, using geodetic measurements has been a major focus in earthquake prediction research. A recent study claims to have detected a preseismic signal interpreted as accelerating slip near the hypocenter of the 2011 great Tohoku‐oki earthquake, starting approximately 2 hr before the mainshock. This claim is based on a stacking procedure using GNSS (Global Navigation Satellite System) data. However, a follow‐up study demonstrated that the signal disappeared when specific GNSS noise was corrected. Here we utilize tiltmeter records, independent on GNSS, to check whether the claimed preseismic signal is detected using a similar stacking procedure. Our results show no acceleration‐like deformation from 2 hr before the mainshock. This indicates that no precursory slip exceeded the noise level of the tilt data, and if any preslip occurred, it was less than 5.0 × 1018 Nm in seismic moment. |
| format | Article |
| id | doaj-art-27f70f2e575d4c4b90c788ddcc716c52 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-27f70f2e575d4c4b90c788ddcc716c522025-08-20T01:52:06ZengWileyGeophysical Research Letters0094-82761944-80072024-06-015112n/an/a10.1029/2024GL109384Did Short‐Term Preseismic Crustal Deformation Precede the 2011 Great Tohoku‐Oki Earthquake? An Examination of Stacked Tilt RecordsHitoshi Hirose0Aitaro Kato1Takeshi Kimura2Research Center for Urban Safety and Security Kobe University Kobe JapanEarthquake Research Institute The University of Tokyo Tokyo JapanNational Research Institute for Earth Science and Disaster Resilience Ibaraki JapanAbstract The detection of preslip, occurring hours to days before a large earthquake, using geodetic measurements has been a major focus in earthquake prediction research. A recent study claims to have detected a preseismic signal interpreted as accelerating slip near the hypocenter of the 2011 great Tohoku‐oki earthquake, starting approximately 2 hr before the mainshock. This claim is based on a stacking procedure using GNSS (Global Navigation Satellite System) data. However, a follow‐up study demonstrated that the signal disappeared when specific GNSS noise was corrected. Here we utilize tiltmeter records, independent on GNSS, to check whether the claimed preseismic signal is detected using a similar stacking procedure. Our results show no acceleration‐like deformation from 2 hr before the mainshock. This indicates that no precursory slip exceeded the noise level of the tilt data, and if any preslip occurred, it was less than 5.0 × 1018 Nm in seismic moment.https://doi.org/10.1029/2024GL109384tiltmeterpreseismic slipcrustal deformationearthquake initiation process |
| spellingShingle | Hitoshi Hirose Aitaro Kato Takeshi Kimura Did Short‐Term Preseismic Crustal Deformation Precede the 2011 Great Tohoku‐Oki Earthquake? An Examination of Stacked Tilt Records Geophysical Research Letters tiltmeter preseismic slip crustal deformation earthquake initiation process |
| title | Did Short‐Term Preseismic Crustal Deformation Precede the 2011 Great Tohoku‐Oki Earthquake? An Examination of Stacked Tilt Records |
| title_full | Did Short‐Term Preseismic Crustal Deformation Precede the 2011 Great Tohoku‐Oki Earthquake? An Examination of Stacked Tilt Records |
| title_fullStr | Did Short‐Term Preseismic Crustal Deformation Precede the 2011 Great Tohoku‐Oki Earthquake? An Examination of Stacked Tilt Records |
| title_full_unstemmed | Did Short‐Term Preseismic Crustal Deformation Precede the 2011 Great Tohoku‐Oki Earthquake? An Examination of Stacked Tilt Records |
| title_short | Did Short‐Term Preseismic Crustal Deformation Precede the 2011 Great Tohoku‐Oki Earthquake? An Examination of Stacked Tilt Records |
| title_sort | did short term preseismic crustal deformation precede the 2011 great tohoku oki earthquake an examination of stacked tilt records |
| topic | tiltmeter preseismic slip crustal deformation earthquake initiation process |
| url | https://doi.org/10.1029/2024GL109384 |
| work_keys_str_mv | AT hitoshihirose didshorttermpreseismiccrustaldeformationprecedethe2011greattohokuokiearthquakeanexaminationofstackedtiltrecords AT aitarokato didshorttermpreseismiccrustaldeformationprecedethe2011greattohokuokiearthquakeanexaminationofstackedtiltrecords AT takeshikimura didshorttermpreseismiccrustaldeformationprecedethe2011greattohokuokiearthquakeanexaminationofstackedtiltrecords |