Seismic velocity structure in the source region of the 2016 Kumamoto earthquake sequence, Japan
We investigate seismic wave velocity structure and spatial distribution of the seismicity in the source region of the 2016 Kumamoto earthquake sequence. A one‐dimensional mean velocity shows that the seismogenic zone has a high‐velocity and low‐Vp/Vs ratio relative to the average velocity structure...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Shito, Azusa [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2017 |
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| Rechteinformationen: |
Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Geophysical research letters - Washington, DC : Union, 1974, 44(2017), 15, Seite 7766-7772 |
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| Übergeordnetes Werk: |
volume:44 ; year:2017 ; number:15 ; pages:7766-7772 |
| Links: |
|---|
| DOI / URN: |
10.1002/2017GL074593 |
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| Katalog-ID: |
OLC199698120X |
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| 245 | 1 | 0 | |a Seismic velocity structure in the source region of the 2016 Kumamoto earthquake sequence, Japan |
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| 520 | |a We investigate seismic wave velocity structure and spatial distribution of the seismicity in the source region of the 2016 Kumamoto earthquake sequence. A one‐dimensional mean velocity shows that the seismogenic zone has a high‐velocity and low‐Vp/Vs ratio relative to the average velocity structure of Kyushu Island. This indicates that the crust is relatively strong, capable of sustaining sufficiently high strain energy to facilitate two large ( M j > 6.5) earthquakes in close proximity to one another in rapid succession. Three‐dimensional tomography of the seismogenic zone around the source of the 2016 Kumamoto earthquake sequence yields Vp = 6 km/s and Vs = 3.5 km/s. Most large‐displacement areas (asperities) of the M j 7.3 event overlap with the seismogenic zone and the overlying surface layer. Aftershock seismicity is distributed deeper than the conventional seismogenic zone, which suggests decreased strength due to fluids or increased stress, both caused by coseismic slip. One‐dimensional mean velocity structure suggests high crustal stress in the source region, sufficient for the earthquake sequence A large‐displacement area of the M j 7.3 event corresponds to the region with moderate seismic velocities (Vp = 6.0 km/s, Vs = 3.5 km/s) Penetration of the aftershock seismicity into conventional aseismic depth suggests existence of fluids or stress concentration | ||
| 540 | |a Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. | ||
| 650 | 4 | |a the 2016 Kumamoto earthquakes | |
| 650 | 4 | |a double‐difference tomography | |
| 650 | 4 | |a velocity structure | |
| 650 | 4 | |a Earthquakes | |
| 650 | 4 | |a Seismic waves | |
| 650 | 4 | |a Spatial distribution | |
| 650 | 4 | |a Seismic phenomena | |
| 650 | 4 | |a Aftershocks | |
| 650 | 4 | |a Oceanic crust | |
| 650 | 4 | |a Surface layer | |
| 650 | 4 | |a Velocity | |
| 650 | 4 | |a Surface layers | |
| 650 | 4 | |a Succession | |
| 650 | 4 | |a Fluids | |
| 650 | 4 | |a Strain | |
| 650 | 4 | |a Seismicity | |
| 650 | 4 | |a Average velocity | |
| 650 | 4 | |a Seismic velocities | |
| 650 | 4 | |a Ecological succession | |
| 650 | 4 | |a Energy | |
| 650 | 4 | |a Seismic activity | |
| 650 | 4 | |a Sequencing | |
| 650 | 4 | |a Tomography | |
| 650 | 4 | |a Wave velocity | |
| 650 | 4 | |a Spatial discrimination | |
| 700 | 1 | |a Matsumoto, Satoshi |4 oth | |
| 700 | 1 | |a Shimizu, Hiroshi |4 oth | |
| 700 | 1 | |a Ohkura, Takahiro |4 oth | |
| 700 | 1 | |a Takahashi, Hiroaki |4 oth | |
| 700 | 1 | |a Sakai, Shinichi |4 oth | |
| 700 | 1 | |a Okada, Tomomi |4 oth | |
| 700 | 1 | |a Miyamachi, Hiroki |4 oth | |
| 700 | 1 | |a Kosuga, Masahiro |4 oth | |
| 700 | 1 | |a Maeda, Yuta |4 oth | |
| 700 | 1 | |a Yoshimi, Masayuki |4 oth | |
| 700 | 1 | |a Asano, Youichi |4 oth | |
| 700 | 1 | |a Okubo, Makoto |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |t Geophysical research letters |d Washington, DC : Union, 1974 |g 44(2017), 15, Seite 7766-7772 |w (DE-627)129095109 |w (DE-600)7403-2 |w (DE-576)01443122X |x 0094-8276 |7 nnns |
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| 856 | 4 | 1 | |u http://dx.doi.org/10.1002/2017GL074593 |3 Volltext |
| 856 | 4 | 2 | |u http://onlinelibrary.wiley.com/doi/10.1002/2017GL074593/abstract |
| 856 | 4 | 2 | |u https://search.proquest.com/docview/1932421697 |
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10.1002/2017GL074593 doi PQ20171228 (DE-627)OLC199698120X (DE-599)GBVOLC199698120X (PRQ)p1365-c79f1e67d1d60c2b3ed5adc6373b6735db724dc96c06d811d4b76e929931f7ab0 (KEY)0026932820170000044001507766seismicvelocitystructureinthesourceregionofthe2016 DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Shito, Azusa verfasserin aut Seismic velocity structure in the source region of the 2016 Kumamoto earthquake sequence, Japan 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We investigate seismic wave velocity structure and spatial distribution of the seismicity in the source region of the 2016 Kumamoto earthquake sequence. A one‐dimensional mean velocity shows that the seismogenic zone has a high‐velocity and low‐Vp/Vs ratio relative to the average velocity structure of Kyushu Island. This indicates that the crust is relatively strong, capable of sustaining sufficiently high strain energy to facilitate two large ( M j > 6.5) earthquakes in close proximity to one another in rapid succession. Three‐dimensional tomography of the seismogenic zone around the source of the 2016 Kumamoto earthquake sequence yields Vp = 6 km/s and Vs = 3.5 km/s. Most large‐displacement areas (asperities) of the M j 7.3 event overlap with the seismogenic zone and the overlying surface layer. Aftershock seismicity is distributed deeper than the conventional seismogenic zone, which suggests decreased strength due to fluids or increased stress, both caused by coseismic slip. One‐dimensional mean velocity structure suggests high crustal stress in the source region, sufficient for the earthquake sequence A large‐displacement area of the M j 7.3 event corresponds to the region with moderate seismic velocities (Vp = 6.0 km/s, Vs = 3.5 km/s) Penetration of the aftershock seismicity into conventional aseismic depth suggests existence of fluids or stress concentration Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. the 2016 Kumamoto earthquakes double‐difference tomography velocity structure Earthquakes Seismic waves Spatial distribution Seismic phenomena Aftershocks Oceanic crust Surface layer Velocity Surface layers Succession Fluids Strain Seismicity Average velocity Seismic velocities Ecological succession Energy Seismic activity Sequencing Tomography Wave velocity Spatial discrimination Matsumoto, Satoshi oth Shimizu, Hiroshi oth Ohkura, Takahiro oth Takahashi, Hiroaki oth Sakai, Shinichi oth Okada, Tomomi oth Miyamachi, Hiroki oth Kosuga, Masahiro oth Maeda, Yuta oth Yoshimi, Masayuki oth Asano, Youichi oth Okubo, Makoto oth Enthalten in Geophysical research letters Washington, DC : Union, 1974 44(2017), 15, Seite 7766-7772 (DE-627)129095109 (DE-600)7403-2 (DE-576)01443122X 0094-8276 nnns volume:44 year:2017 number:15 pages:7766-7772 http://dx.doi.org/10.1002/2017GL074593 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2017GL074593/abstract https://search.proquest.com/docview/1932421697 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_47 GBV_ILN_62 GBV_ILN_154 GBV_ILN_601 GBV_ILN_2279 38.70 AVZ AR 44 2017 15 7766-7772 |
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10.1002/2017GL074593 doi PQ20171228 (DE-627)OLC199698120X (DE-599)GBVOLC199698120X (PRQ)p1365-c79f1e67d1d60c2b3ed5adc6373b6735db724dc96c06d811d4b76e929931f7ab0 (KEY)0026932820170000044001507766seismicvelocitystructureinthesourceregionofthe2016 DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Shito, Azusa verfasserin aut Seismic velocity structure in the source region of the 2016 Kumamoto earthquake sequence, Japan 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We investigate seismic wave velocity structure and spatial distribution of the seismicity in the source region of the 2016 Kumamoto earthquake sequence. A one‐dimensional mean velocity shows that the seismogenic zone has a high‐velocity and low‐Vp/Vs ratio relative to the average velocity structure of Kyushu Island. This indicates that the crust is relatively strong, capable of sustaining sufficiently high strain energy to facilitate two large ( M j > 6.5) earthquakes in close proximity to one another in rapid succession. Three‐dimensional tomography of the seismogenic zone around the source of the 2016 Kumamoto earthquake sequence yields Vp = 6 km/s and Vs = 3.5 km/s. Most large‐displacement areas (asperities) of the M j 7.3 event overlap with the seismogenic zone and the overlying surface layer. Aftershock seismicity is distributed deeper than the conventional seismogenic zone, which suggests decreased strength due to fluids or increased stress, both caused by coseismic slip. One‐dimensional mean velocity structure suggests high crustal stress in the source region, sufficient for the earthquake sequence A large‐displacement area of the M j 7.3 event corresponds to the region with moderate seismic velocities (Vp = 6.0 km/s, Vs = 3.5 km/s) Penetration of the aftershock seismicity into conventional aseismic depth suggests existence of fluids or stress concentration Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. the 2016 Kumamoto earthquakes double‐difference tomography velocity structure Earthquakes Seismic waves Spatial distribution Seismic phenomena Aftershocks Oceanic crust Surface layer Velocity Surface layers Succession Fluids Strain Seismicity Average velocity Seismic velocities Ecological succession Energy Seismic activity Sequencing Tomography Wave velocity Spatial discrimination Matsumoto, Satoshi oth Shimizu, Hiroshi oth Ohkura, Takahiro oth Takahashi, Hiroaki oth Sakai, Shinichi oth Okada, Tomomi oth Miyamachi, Hiroki oth Kosuga, Masahiro oth Maeda, Yuta oth Yoshimi, Masayuki oth Asano, Youichi oth Okubo, Makoto oth Enthalten in Geophysical research letters Washington, DC : Union, 1974 44(2017), 15, Seite 7766-7772 (DE-627)129095109 (DE-600)7403-2 (DE-576)01443122X 0094-8276 nnns volume:44 year:2017 number:15 pages:7766-7772 http://dx.doi.org/10.1002/2017GL074593 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2017GL074593/abstract https://search.proquest.com/docview/1932421697 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_47 GBV_ILN_62 GBV_ILN_154 GBV_ILN_601 GBV_ILN_2279 38.70 AVZ AR 44 2017 15 7766-7772 |
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10.1002/2017GL074593 doi PQ20171228 (DE-627)OLC199698120X (DE-599)GBVOLC199698120X (PRQ)p1365-c79f1e67d1d60c2b3ed5adc6373b6735db724dc96c06d811d4b76e929931f7ab0 (KEY)0026932820170000044001507766seismicvelocitystructureinthesourceregionofthe2016 DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Shito, Azusa verfasserin aut Seismic velocity structure in the source region of the 2016 Kumamoto earthquake sequence, Japan 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We investigate seismic wave velocity structure and spatial distribution of the seismicity in the source region of the 2016 Kumamoto earthquake sequence. A one‐dimensional mean velocity shows that the seismogenic zone has a high‐velocity and low‐Vp/Vs ratio relative to the average velocity structure of Kyushu Island. This indicates that the crust is relatively strong, capable of sustaining sufficiently high strain energy to facilitate two large ( M j > 6.5) earthquakes in close proximity to one another in rapid succession. Three‐dimensional tomography of the seismogenic zone around the source of the 2016 Kumamoto earthquake sequence yields Vp = 6 km/s and Vs = 3.5 km/s. Most large‐displacement areas (asperities) of the M j 7.3 event overlap with the seismogenic zone and the overlying surface layer. Aftershock seismicity is distributed deeper than the conventional seismogenic zone, which suggests decreased strength due to fluids or increased stress, both caused by coseismic slip. One‐dimensional mean velocity structure suggests high crustal stress in the source region, sufficient for the earthquake sequence A large‐displacement area of the M j 7.3 event corresponds to the region with moderate seismic velocities (Vp = 6.0 km/s, Vs = 3.5 km/s) Penetration of the aftershock seismicity into conventional aseismic depth suggests existence of fluids or stress concentration Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. the 2016 Kumamoto earthquakes double‐difference tomography velocity structure Earthquakes Seismic waves Spatial distribution Seismic phenomena Aftershocks Oceanic crust Surface layer Velocity Surface layers Succession Fluids Strain Seismicity Average velocity Seismic velocities Ecological succession Energy Seismic activity Sequencing Tomography Wave velocity Spatial discrimination Matsumoto, Satoshi oth Shimizu, Hiroshi oth Ohkura, Takahiro oth Takahashi, Hiroaki oth Sakai, Shinichi oth Okada, Tomomi oth Miyamachi, Hiroki oth Kosuga, Masahiro oth Maeda, Yuta oth Yoshimi, Masayuki oth Asano, Youichi oth Okubo, Makoto oth Enthalten in Geophysical research letters Washington, DC : Union, 1974 44(2017), 15, Seite 7766-7772 (DE-627)129095109 (DE-600)7403-2 (DE-576)01443122X 0094-8276 nnns volume:44 year:2017 number:15 pages:7766-7772 http://dx.doi.org/10.1002/2017GL074593 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2017GL074593/abstract https://search.proquest.com/docview/1932421697 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_47 GBV_ILN_62 GBV_ILN_154 GBV_ILN_601 GBV_ILN_2279 38.70 AVZ AR 44 2017 15 7766-7772 |
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10.1002/2017GL074593 doi PQ20171228 (DE-627)OLC199698120X (DE-599)GBVOLC199698120X (PRQ)p1365-c79f1e67d1d60c2b3ed5adc6373b6735db724dc96c06d811d4b76e929931f7ab0 (KEY)0026932820170000044001507766seismicvelocitystructureinthesourceregionofthe2016 DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Shito, Azusa verfasserin aut Seismic velocity structure in the source region of the 2016 Kumamoto earthquake sequence, Japan 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We investigate seismic wave velocity structure and spatial distribution of the seismicity in the source region of the 2016 Kumamoto earthquake sequence. A one‐dimensional mean velocity shows that the seismogenic zone has a high‐velocity and low‐Vp/Vs ratio relative to the average velocity structure of Kyushu Island. This indicates that the crust is relatively strong, capable of sustaining sufficiently high strain energy to facilitate two large ( M j > 6.5) earthquakes in close proximity to one another in rapid succession. Three‐dimensional tomography of the seismogenic zone around the source of the 2016 Kumamoto earthquake sequence yields Vp = 6 km/s and Vs = 3.5 km/s. Most large‐displacement areas (asperities) of the M j 7.3 event overlap with the seismogenic zone and the overlying surface layer. Aftershock seismicity is distributed deeper than the conventional seismogenic zone, which suggests decreased strength due to fluids or increased stress, both caused by coseismic slip. One‐dimensional mean velocity structure suggests high crustal stress in the source region, sufficient for the earthquake sequence A large‐displacement area of the M j 7.3 event corresponds to the region with moderate seismic velocities (Vp = 6.0 km/s, Vs = 3.5 km/s) Penetration of the aftershock seismicity into conventional aseismic depth suggests existence of fluids or stress concentration Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. the 2016 Kumamoto earthquakes double‐difference tomography velocity structure Earthquakes Seismic waves Spatial distribution Seismic phenomena Aftershocks Oceanic crust Surface layer Velocity Surface layers Succession Fluids Strain Seismicity Average velocity Seismic velocities Ecological succession Energy Seismic activity Sequencing Tomography Wave velocity Spatial discrimination Matsumoto, Satoshi oth Shimizu, Hiroshi oth Ohkura, Takahiro oth Takahashi, Hiroaki oth Sakai, Shinichi oth Okada, Tomomi oth Miyamachi, Hiroki oth Kosuga, Masahiro oth Maeda, Yuta oth Yoshimi, Masayuki oth Asano, Youichi oth Okubo, Makoto oth Enthalten in Geophysical research letters Washington, DC : Union, 1974 44(2017), 15, Seite 7766-7772 (DE-627)129095109 (DE-600)7403-2 (DE-576)01443122X 0094-8276 nnns volume:44 year:2017 number:15 pages:7766-7772 http://dx.doi.org/10.1002/2017GL074593 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2017GL074593/abstract https://search.proquest.com/docview/1932421697 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_47 GBV_ILN_62 GBV_ILN_154 GBV_ILN_601 GBV_ILN_2279 38.70 AVZ AR 44 2017 15 7766-7772 |
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10.1002/2017GL074593 doi PQ20171228 (DE-627)OLC199698120X (DE-599)GBVOLC199698120X (PRQ)p1365-c79f1e67d1d60c2b3ed5adc6373b6735db724dc96c06d811d4b76e929931f7ab0 (KEY)0026932820170000044001507766seismicvelocitystructureinthesourceregionofthe2016 DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Shito, Azusa verfasserin aut Seismic velocity structure in the source region of the 2016 Kumamoto earthquake sequence, Japan 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We investigate seismic wave velocity structure and spatial distribution of the seismicity in the source region of the 2016 Kumamoto earthquake sequence. A one‐dimensional mean velocity shows that the seismogenic zone has a high‐velocity and low‐Vp/Vs ratio relative to the average velocity structure of Kyushu Island. This indicates that the crust is relatively strong, capable of sustaining sufficiently high strain energy to facilitate two large ( M j > 6.5) earthquakes in close proximity to one another in rapid succession. Three‐dimensional tomography of the seismogenic zone around the source of the 2016 Kumamoto earthquake sequence yields Vp = 6 km/s and Vs = 3.5 km/s. Most large‐displacement areas (asperities) of the M j 7.3 event overlap with the seismogenic zone and the overlying surface layer. Aftershock seismicity is distributed deeper than the conventional seismogenic zone, which suggests decreased strength due to fluids or increased stress, both caused by coseismic slip. One‐dimensional mean velocity structure suggests high crustal stress in the source region, sufficient for the earthquake sequence A large‐displacement area of the M j 7.3 event corresponds to the region with moderate seismic velocities (Vp = 6.0 km/s, Vs = 3.5 km/s) Penetration of the aftershock seismicity into conventional aseismic depth suggests existence of fluids or stress concentration Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. the 2016 Kumamoto earthquakes double‐difference tomography velocity structure Earthquakes Seismic waves Spatial distribution Seismic phenomena Aftershocks Oceanic crust Surface layer Velocity Surface layers Succession Fluids Strain Seismicity Average velocity Seismic velocities Ecological succession Energy Seismic activity Sequencing Tomography Wave velocity Spatial discrimination Matsumoto, Satoshi oth Shimizu, Hiroshi oth Ohkura, Takahiro oth Takahashi, Hiroaki oth Sakai, Shinichi oth Okada, Tomomi oth Miyamachi, Hiroki oth Kosuga, Masahiro oth Maeda, Yuta oth Yoshimi, Masayuki oth Asano, Youichi oth Okubo, Makoto oth Enthalten in Geophysical research letters Washington, DC : Union, 1974 44(2017), 15, Seite 7766-7772 (DE-627)129095109 (DE-600)7403-2 (DE-576)01443122X 0094-8276 nnns volume:44 year:2017 number:15 pages:7766-7772 http://dx.doi.org/10.1002/2017GL074593 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2017GL074593/abstract https://search.proquest.com/docview/1932421697 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_47 GBV_ILN_62 GBV_ILN_154 GBV_ILN_601 GBV_ILN_2279 38.70 AVZ AR 44 2017 15 7766-7772 |
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the 2016 Kumamoto earthquakes double‐difference tomography velocity structure Earthquakes Seismic waves Spatial distribution Seismic phenomena Aftershocks Oceanic crust Surface layer Velocity Surface layers Succession Fluids Strain Seismicity Average velocity Seismic velocities Ecological succession Energy Seismic activity Sequencing Tomography Wave velocity Spatial discrimination |
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Shito, Azusa @@aut@@ Matsumoto, Satoshi @@oth@@ Shimizu, Hiroshi @@oth@@ Ohkura, Takahiro @@oth@@ Takahashi, Hiroaki @@oth@@ Sakai, Shinichi @@oth@@ Okada, Tomomi @@oth@@ Miyamachi, Hiroki @@oth@@ Kosuga, Masahiro @@oth@@ Maeda, Yuta @@oth@@ Yoshimi, Masayuki @@oth@@ Asano, Youichi @@oth@@ Okubo, Makoto @@oth@@ |
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A one‐dimensional mean velocity shows that the seismogenic zone has a high‐velocity and low‐Vp/Vs ratio relative to the average velocity structure of Kyushu Island. This indicates that the crust is relatively strong, capable of sustaining sufficiently high strain energy to facilitate two large ( M j > 6.5) earthquakes in close proximity to one another in rapid succession. Three‐dimensional tomography of the seismogenic zone around the source of the 2016 Kumamoto earthquake sequence yields Vp = 6 km/s and Vs = 3.5 km/s. Most large‐displacement areas (asperities) of the M j 7.3 event overlap with the seismogenic zone and the overlying surface layer. Aftershock seismicity is distributed deeper than the conventional seismogenic zone, which suggests decreased strength due to fluids or increased stress, both caused by coseismic slip. One‐dimensional mean velocity structure suggests high crustal stress in the source region, sufficient for the earthquake sequence A large‐displacement area of the M j 7.3 event corresponds to the region with moderate seismic velocities (Vp = 6.0 km/s, Vs = 3.5 km/s) Penetration of the aftershock seismicity into conventional aseismic depth suggests existence of fluids or stress concentration</subfield></datafield><datafield tag="540" ind1=" " ind2=" "><subfield code="a">Nutzungsrecht: © 2017. American Geophysical Union. 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Shito, Azusa |
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Shito, Azusa ddc 550 bkl 38.70 misc the 2016 Kumamoto earthquakes misc double‐difference tomography misc velocity structure misc Earthquakes misc Seismic waves misc Spatial distribution misc Seismic phenomena misc Aftershocks misc Oceanic crust misc Surface layer misc Velocity misc Surface layers misc Succession misc Fluids misc Strain misc Seismicity misc Average velocity misc Seismic velocities misc Ecological succession misc Energy misc Seismic activity misc Sequencing misc Tomography misc Wave velocity misc Spatial discrimination Seismic velocity structure in the source region of the 2016 Kumamoto earthquake sequence, Japan |
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550 DNB 38.70 bkl Seismic velocity structure in the source region of the 2016 Kumamoto earthquake sequence, Japan the 2016 Kumamoto earthquakes double‐difference tomography velocity structure Earthquakes Seismic waves Spatial distribution Seismic phenomena Aftershocks Oceanic crust Surface layer Velocity Surface layers Succession Fluids Strain Seismicity Average velocity Seismic velocities Ecological succession Energy Seismic activity Sequencing Tomography Wave velocity Spatial discrimination |
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ddc 550 bkl 38.70 misc the 2016 Kumamoto earthquakes misc double‐difference tomography misc velocity structure misc Earthquakes misc Seismic waves misc Spatial distribution misc Seismic phenomena misc Aftershocks misc Oceanic crust misc Surface layer misc Velocity misc Surface layers misc Succession misc Fluids misc Strain misc Seismicity misc Average velocity misc Seismic velocities misc Ecological succession misc Energy misc Seismic activity misc Sequencing misc Tomography misc Wave velocity misc Spatial discrimination |
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ddc 550 bkl 38.70 misc the 2016 Kumamoto earthquakes misc double‐difference tomography misc velocity structure misc Earthquakes misc Seismic waves misc Spatial distribution misc Seismic phenomena misc Aftershocks misc Oceanic crust misc Surface layer misc Velocity misc Surface layers misc Succession misc Fluids misc Strain misc Seismicity misc Average velocity misc Seismic velocities misc Ecological succession misc Energy misc Seismic activity misc Sequencing misc Tomography misc Wave velocity misc Spatial discrimination |
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Seismic velocity structure in the source region of the 2016 Kumamoto earthquake sequence, Japan |
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seismic velocity structure in the source region of the 2016 kumamoto earthquake sequence, japan |
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Seismic velocity structure in the source region of the 2016 Kumamoto earthquake sequence, Japan |
| abstract |
We investigate seismic wave velocity structure and spatial distribution of the seismicity in the source region of the 2016 Kumamoto earthquake sequence. A one‐dimensional mean velocity shows that the seismogenic zone has a high‐velocity and low‐Vp/Vs ratio relative to the average velocity structure of Kyushu Island. This indicates that the crust is relatively strong, capable of sustaining sufficiently high strain energy to facilitate two large ( M j > 6.5) earthquakes in close proximity to one another in rapid succession. Three‐dimensional tomography of the seismogenic zone around the source of the 2016 Kumamoto earthquake sequence yields Vp = 6 km/s and Vs = 3.5 km/s. Most large‐displacement areas (asperities) of the M j 7.3 event overlap with the seismogenic zone and the overlying surface layer. Aftershock seismicity is distributed deeper than the conventional seismogenic zone, which suggests decreased strength due to fluids or increased stress, both caused by coseismic slip. One‐dimensional mean velocity structure suggests high crustal stress in the source region, sufficient for the earthquake sequence A large‐displacement area of the M j 7.3 event corresponds to the region with moderate seismic velocities (Vp = 6.0 km/s, Vs = 3.5 km/s) Penetration of the aftershock seismicity into conventional aseismic depth suggests existence of fluids or stress concentration |
| abstractGer |
We investigate seismic wave velocity structure and spatial distribution of the seismicity in the source region of the 2016 Kumamoto earthquake sequence. A one‐dimensional mean velocity shows that the seismogenic zone has a high‐velocity and low‐Vp/Vs ratio relative to the average velocity structure of Kyushu Island. This indicates that the crust is relatively strong, capable of sustaining sufficiently high strain energy to facilitate two large ( M j > 6.5) earthquakes in close proximity to one another in rapid succession. Three‐dimensional tomography of the seismogenic zone around the source of the 2016 Kumamoto earthquake sequence yields Vp = 6 km/s and Vs = 3.5 km/s. Most large‐displacement areas (asperities) of the M j 7.3 event overlap with the seismogenic zone and the overlying surface layer. Aftershock seismicity is distributed deeper than the conventional seismogenic zone, which suggests decreased strength due to fluids or increased stress, both caused by coseismic slip. One‐dimensional mean velocity structure suggests high crustal stress in the source region, sufficient for the earthquake sequence A large‐displacement area of the M j 7.3 event corresponds to the region with moderate seismic velocities (Vp = 6.0 km/s, Vs = 3.5 km/s) Penetration of the aftershock seismicity into conventional aseismic depth suggests existence of fluids or stress concentration |
| abstract_unstemmed |
We investigate seismic wave velocity structure and spatial distribution of the seismicity in the source region of the 2016 Kumamoto earthquake sequence. A one‐dimensional mean velocity shows that the seismogenic zone has a high‐velocity and low‐Vp/Vs ratio relative to the average velocity structure of Kyushu Island. This indicates that the crust is relatively strong, capable of sustaining sufficiently high strain energy to facilitate two large ( M j > 6.5) earthquakes in close proximity to one another in rapid succession. Three‐dimensional tomography of the seismogenic zone around the source of the 2016 Kumamoto earthquake sequence yields Vp = 6 km/s and Vs = 3.5 km/s. Most large‐displacement areas (asperities) of the M j 7.3 event overlap with the seismogenic zone and the overlying surface layer. Aftershock seismicity is distributed deeper than the conventional seismogenic zone, which suggests decreased strength due to fluids or increased stress, both caused by coseismic slip. One‐dimensional mean velocity structure suggests high crustal stress in the source region, sufficient for the earthquake sequence A large‐displacement area of the M j 7.3 event corresponds to the region with moderate seismic velocities (Vp = 6.0 km/s, Vs = 3.5 km/s) Penetration of the aftershock seismicity into conventional aseismic depth suggests existence of fluids or stress concentration |
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| title_short |
Seismic velocity structure in the source region of the 2016 Kumamoto earthquake sequence, Japan |
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http://dx.doi.org/10.1002/2017GL074593 http://onlinelibrary.wiley.com/doi/10.1002/2017GL074593/abstract https://search.proquest.com/docview/1932421697 |
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Matsumoto, Satoshi Shimizu, Hiroshi Ohkura, Takahiro Takahashi, Hiroaki Sakai, Shinichi Okada, Tomomi Miyamachi, Hiroki Kosuga, Masahiro Maeda, Yuta Yoshimi, Masayuki Asano, Youichi Okubo, Makoto |
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Matsumoto, Satoshi Shimizu, Hiroshi Ohkura, Takahiro Takahashi, Hiroaki Sakai, Shinichi Okada, Tomomi Miyamachi, Hiroki Kosuga, Masahiro Maeda, Yuta Yoshimi, Masayuki Asano, Youichi Okubo, Makoto |
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One‐dimensional mean velocity structure suggests high crustal stress in the source region, sufficient for the earthquake sequence A large‐displacement area of the M j 7.3 event corresponds to the region with moderate seismic velocities (Vp = 6.0 km/s, Vs = 3.5 km/s) Penetration of the aftershock seismicity into conventional aseismic depth suggests existence of fluids or stress concentration</subfield></datafield><datafield tag="540" ind1=" " ind2=" "><subfield code="a">Nutzungsrecht: © 2017. American Geophysical Union. 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