Mapping P-wave azimuthal anisotropy of the New Madrid seismic zone

We determine a detailed tomographic model of 3-D P-wave azimuthal anisotropy in the crust and upper mantle beneath the New Madrid seismic zone (NMSZ) using a large number of high-quality arrival-time data of 877 local earthquakes and relative travel-time data of 1511 teleseismic events recorded at 6...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Wang, Zewei [verfasserIn] Zhao, Dapeng [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2019

Schlagwörter:	New Madrid seismic zone Intraplate earthquakes Anisotropic tomography Mantle dynamics

Übergeordnetes Werk:	Enthalten in: Physics of the earth and planetary interiors - Amsterdam [u.a.] : Elsevier Science, 1967, 295
Übergeordnetes Werk:	volume:295

DOI / URN:	10.1016/j.pepi.2019.106296

Katalog-ID:	ELV002992876

Internformat


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245	1	0	\|a Mapping P-wave azimuthal anisotropy of the New Madrid seismic zone
264		1	\|c 2019
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520			\|a We determine a detailed tomographic model of 3-D P-wave azimuthal anisotropy in the crust and upper mantle beneath the New Madrid seismic zone (NMSZ) using a large number of high-quality arrival-time data of 877 local earthquakes and relative travel-time data of 1511 teleseismic events recorded at 62 USArray stations. The tomographic inversion is conducted by using a limited-memory Broyden–Fletcher–Goldfarb–Shanno algorithm for bound constrained optimization. Because damping regularization is not required in this inversion scheme, the obtained results are less affected by human subjectivity. A prominent low-velocity zone with NE-SW fast velocity directions of azimuthal anisotropy down to ~160 km depth beneath the NMSZ is imaged, which may reflect upwelling mantle materials probably triggered by passage of the Bermuda hotspot from the southwest of the Mississippi embayment. Our results also reveal a subhorizontal high-velocity anomaly around the Moho discontinuity with a width of ~150–200 km, confirming the existence and defining the geometry of a lens-shaped high-density rift pillow near the Moho, which may result from the mantle upwelling. NW-SE fast velocity directions of azimuthal anisotropy appear in the lower crust beneath the Mississippi embayment. This result may reflect recent weakening of a detachment fault above the rift pillow, which drives recurrently sinking of the rift pillow and, as a consequence, causing large repeating intraplate earthquakes in the NMSZ.
650		4	\|a New Madrid seismic zone
650		4	\|a Intraplate earthquakes
650		4	\|a Anisotropic tomography
650		4	\|a Mantle dynamics
700	1		\|a Zhao, Dapeng \|e verfasserin \|4 aut
773	0	8	\|i Enthalten in \|t Physics of the earth and planetary interiors \|d Amsterdam [u.a.] : Elsevier Science, 1967 \|g 295 \|h Online-Ressource \|w (DE-627)306661365 \|w (DE-600)1500666-9 \|w (DE-576)081986920 \|x 1872-7395 \|7 nnns
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author_variant	z w zw d z dz
matchkey_str	article:18727395:2019----::apnpaezmtaaiorpoteemd
hierarchy_sort_str	2019
bklnumber	38.70 39.53
publishDate	2019
allfields	10.1016/j.pepi.2019.106296 doi (DE-627)ELV002992876 (ELSEVIER)S0031-9201(19)30156-6 DE-627 ger DE-627 rda eng 550 520 DE-600 38.70 bkl 39.53 bkl Wang, Zewei verfasserin aut Mapping P-wave azimuthal anisotropy of the New Madrid seismic zone 2019 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We determine a detailed tomographic model of 3-D P-wave azimuthal anisotropy in the crust and upper mantle beneath the New Madrid seismic zone (NMSZ) using a large number of high-quality arrival-time data of 877 local earthquakes and relative travel-time data of 1511 teleseismic events recorded at 62 USArray stations. The tomographic inversion is conducted by using a limited-memory Broyden–Fletcher–Goldfarb–Shanno algorithm for bound constrained optimization. Because damping regularization is not required in this inversion scheme, the obtained results are less affected by human subjectivity. A prominent low-velocity zone with NE-SW fast velocity directions of azimuthal anisotropy down to ~160 km depth beneath the NMSZ is imaged, which may reflect upwelling mantle materials probably triggered by passage of the Bermuda hotspot from the southwest of the Mississippi embayment. Our results also reveal a subhorizontal high-velocity anomaly around the Moho discontinuity with a width of ~150–200 km, confirming the existence and defining the geometry of a lens-shaped high-density rift pillow near the Moho, which may result from the mantle upwelling. NW-SE fast velocity directions of azimuthal anisotropy appear in the lower crust beneath the Mississippi embayment. This result may reflect recent weakening of a detachment fault above the rift pillow, which drives recurrently sinking of the rift pillow and, as a consequence, causing large repeating intraplate earthquakes in the NMSZ. New Madrid seismic zone Intraplate earthquakes Anisotropic tomography Mantle dynamics Zhao, Dapeng verfasserin aut Enthalten in Physics of the earth and planetary interiors Amsterdam [u.a.] : Elsevier Science, 1967 295 Online-Ressource (DE-627)306661365 (DE-600)1500666-9 (DE-576)081986920 1872-7395 nnns volume:295 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 38.70 Geophysik: Allgemeines 39.53 Planeten AR 295
spelling	10.1016/j.pepi.2019.106296 doi (DE-627)ELV002992876 (ELSEVIER)S0031-9201(19)30156-6 DE-627 ger DE-627 rda eng 550 520 DE-600 38.70 bkl 39.53 bkl Wang, Zewei verfasserin aut Mapping P-wave azimuthal anisotropy of the New Madrid seismic zone 2019 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We determine a detailed tomographic model of 3-D P-wave azimuthal anisotropy in the crust and upper mantle beneath the New Madrid seismic zone (NMSZ) using a large number of high-quality arrival-time data of 877 local earthquakes and relative travel-time data of 1511 teleseismic events recorded at 62 USArray stations. The tomographic inversion is conducted by using a limited-memory Broyden–Fletcher–Goldfarb–Shanno algorithm for bound constrained optimization. Because damping regularization is not required in this inversion scheme, the obtained results are less affected by human subjectivity. A prominent low-velocity zone with NE-SW fast velocity directions of azimuthal anisotropy down to ~160 km depth beneath the NMSZ is imaged, which may reflect upwelling mantle materials probably triggered by passage of the Bermuda hotspot from the southwest of the Mississippi embayment. Our results also reveal a subhorizontal high-velocity anomaly around the Moho discontinuity with a width of ~150–200 km, confirming the existence and defining the geometry of a lens-shaped high-density rift pillow near the Moho, which may result from the mantle upwelling. NW-SE fast velocity directions of azimuthal anisotropy appear in the lower crust beneath the Mississippi embayment. This result may reflect recent weakening of a detachment fault above the rift pillow, which drives recurrently sinking of the rift pillow and, as a consequence, causing large repeating intraplate earthquakes in the NMSZ. New Madrid seismic zone Intraplate earthquakes Anisotropic tomography Mantle dynamics Zhao, Dapeng verfasserin aut Enthalten in Physics of the earth and planetary interiors Amsterdam [u.a.] : Elsevier Science, 1967 295 Online-Ressource (DE-627)306661365 (DE-600)1500666-9 (DE-576)081986920 1872-7395 nnns volume:295 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 38.70 Geophysik: Allgemeines 39.53 Planeten AR 295
allfields_unstemmed	10.1016/j.pepi.2019.106296 doi (DE-627)ELV002992876 (ELSEVIER)S0031-9201(19)30156-6 DE-627 ger DE-627 rda eng 550 520 DE-600 38.70 bkl 39.53 bkl Wang, Zewei verfasserin aut Mapping P-wave azimuthal anisotropy of the New Madrid seismic zone 2019 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We determine a detailed tomographic model of 3-D P-wave azimuthal anisotropy in the crust and upper mantle beneath the New Madrid seismic zone (NMSZ) using a large number of high-quality arrival-time data of 877 local earthquakes and relative travel-time data of 1511 teleseismic events recorded at 62 USArray stations. The tomographic inversion is conducted by using a limited-memory Broyden–Fletcher–Goldfarb–Shanno algorithm for bound constrained optimization. Because damping regularization is not required in this inversion scheme, the obtained results are less affected by human subjectivity. A prominent low-velocity zone with NE-SW fast velocity directions of azimuthal anisotropy down to ~160 km depth beneath the NMSZ is imaged, which may reflect upwelling mantle materials probably triggered by passage of the Bermuda hotspot from the southwest of the Mississippi embayment. Our results also reveal a subhorizontal high-velocity anomaly around the Moho discontinuity with a width of ~150–200 km, confirming the existence and defining the geometry of a lens-shaped high-density rift pillow near the Moho, which may result from the mantle upwelling. NW-SE fast velocity directions of azimuthal anisotropy appear in the lower crust beneath the Mississippi embayment. This result may reflect recent weakening of a detachment fault above the rift pillow, which drives recurrently sinking of the rift pillow and, as a consequence, causing large repeating intraplate earthquakes in the NMSZ. New Madrid seismic zone Intraplate earthquakes Anisotropic tomography Mantle dynamics Zhao, Dapeng verfasserin aut Enthalten in Physics of the earth and planetary interiors Amsterdam [u.a.] : Elsevier Science, 1967 295 Online-Ressource (DE-627)306661365 (DE-600)1500666-9 (DE-576)081986920 1872-7395 nnns volume:295 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 38.70 Geophysik: Allgemeines 39.53 Planeten AR 295
allfieldsGer	10.1016/j.pepi.2019.106296 doi (DE-627)ELV002992876 (ELSEVIER)S0031-9201(19)30156-6 DE-627 ger DE-627 rda eng 550 520 DE-600 38.70 bkl 39.53 bkl Wang, Zewei verfasserin aut Mapping P-wave azimuthal anisotropy of the New Madrid seismic zone 2019 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We determine a detailed tomographic model of 3-D P-wave azimuthal anisotropy in the crust and upper mantle beneath the New Madrid seismic zone (NMSZ) using a large number of high-quality arrival-time data of 877 local earthquakes and relative travel-time data of 1511 teleseismic events recorded at 62 USArray stations. The tomographic inversion is conducted by using a limited-memory Broyden–Fletcher–Goldfarb–Shanno algorithm for bound constrained optimization. Because damping regularization is not required in this inversion scheme, the obtained results are less affected by human subjectivity. A prominent low-velocity zone with NE-SW fast velocity directions of azimuthal anisotropy down to ~160 km depth beneath the NMSZ is imaged, which may reflect upwelling mantle materials probably triggered by passage of the Bermuda hotspot from the southwest of the Mississippi embayment. Our results also reveal a subhorizontal high-velocity anomaly around the Moho discontinuity with a width of ~150–200 km, confirming the existence and defining the geometry of a lens-shaped high-density rift pillow near the Moho, which may result from the mantle upwelling. NW-SE fast velocity directions of azimuthal anisotropy appear in the lower crust beneath the Mississippi embayment. This result may reflect recent weakening of a detachment fault above the rift pillow, which drives recurrently sinking of the rift pillow and, as a consequence, causing large repeating intraplate earthquakes in the NMSZ. New Madrid seismic zone Intraplate earthquakes Anisotropic tomography Mantle dynamics Zhao, Dapeng verfasserin aut Enthalten in Physics of the earth and planetary interiors Amsterdam [u.a.] : Elsevier Science, 1967 295 Online-Ressource (DE-627)306661365 (DE-600)1500666-9 (DE-576)081986920 1872-7395 nnns volume:295 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 38.70 Geophysik: Allgemeines 39.53 Planeten AR 295
allfieldsSound	10.1016/j.pepi.2019.106296 doi (DE-627)ELV002992876 (ELSEVIER)S0031-9201(19)30156-6 DE-627 ger DE-627 rda eng 550 520 DE-600 38.70 bkl 39.53 bkl Wang, Zewei verfasserin aut Mapping P-wave azimuthal anisotropy of the New Madrid seismic zone 2019 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We determine a detailed tomographic model of 3-D P-wave azimuthal anisotropy in the crust and upper mantle beneath the New Madrid seismic zone (NMSZ) using a large number of high-quality arrival-time data of 877 local earthquakes and relative travel-time data of 1511 teleseismic events recorded at 62 USArray stations. The tomographic inversion is conducted by using a limited-memory Broyden–Fletcher–Goldfarb–Shanno algorithm for bound constrained optimization. Because damping regularization is not required in this inversion scheme, the obtained results are less affected by human subjectivity. A prominent low-velocity zone with NE-SW fast velocity directions of azimuthal anisotropy down to ~160 km depth beneath the NMSZ is imaged, which may reflect upwelling mantle materials probably triggered by passage of the Bermuda hotspot from the southwest of the Mississippi embayment. Our results also reveal a subhorizontal high-velocity anomaly around the Moho discontinuity with a width of ~150–200 km, confirming the existence and defining the geometry of a lens-shaped high-density rift pillow near the Moho, which may result from the mantle upwelling. NW-SE fast velocity directions of azimuthal anisotropy appear in the lower crust beneath the Mississippi embayment. This result may reflect recent weakening of a detachment fault above the rift pillow, which drives recurrently sinking of the rift pillow and, as a consequence, causing large repeating intraplate earthquakes in the NMSZ. New Madrid seismic zone Intraplate earthquakes Anisotropic tomography Mantle dynamics Zhao, Dapeng verfasserin aut Enthalten in Physics of the earth and planetary interiors Amsterdam [u.a.] : Elsevier Science, 1967 295 Online-Ressource (DE-627)306661365 (DE-600)1500666-9 (DE-576)081986920 1872-7395 nnns volume:295 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OPC-GGO SSG-OPC-GEO SSG-OPC-AST GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 38.70 Geophysik: Allgemeines 39.53 Planeten AR 295
language	English
source	Enthalten in Physics of the earth and planetary interiors 295 volume:295
sourceStr	Enthalten in Physics of the earth and planetary interiors 295 volume:295
format_phy_str_mv	Article
bklname	Geophysik: Allgemeines Planeten
institution	findex.gbv.de
topic_facet	New Madrid seismic zone Intraplate earthquakes Anisotropic tomography Mantle dynamics
dewey-raw	550
isfreeaccess_bool	false
container_title	Physics of the earth and planetary interiors
authorswithroles_txt_mv	Wang, Zewei @@aut@@ Zhao, Dapeng @@aut@@
publishDateDaySort_date	2019-01-01T00:00:00Z
hierarchy_top_id	306661365
dewey-sort	3550
id	ELV002992876
language_de	englisch
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author	Wang, Zewei
spellingShingle	Wang, Zewei ddc 550 bkl 38.70 bkl 39.53 misc New Madrid seismic zone misc Intraplate earthquakes misc Anisotropic tomography misc Mantle dynamics Mapping P-wave azimuthal anisotropy of the New Madrid seismic zone
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topic_title	550 520 DE-600 38.70 bkl 39.53 bkl Mapping P-wave azimuthal anisotropy of the New Madrid seismic zone New Madrid seismic zone Intraplate earthquakes Anisotropic tomography Mantle dynamics
topic	ddc 550 bkl 38.70 bkl 39.53 misc New Madrid seismic zone misc Intraplate earthquakes misc Anisotropic tomography misc Mantle dynamics
topic_unstemmed	ddc 550 bkl 38.70 bkl 39.53 misc New Madrid seismic zone misc Intraplate earthquakes misc Anisotropic tomography misc Mantle dynamics
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title	Mapping P-wave azimuthal anisotropy of the New Madrid seismic zone
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title_full	Mapping P-wave azimuthal anisotropy of the New Madrid seismic zone
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title_sort	mapping p-wave azimuthal anisotropy of the new madrid seismic zone
title_auth	Mapping P-wave azimuthal anisotropy of the New Madrid seismic zone
abstract	We determine a detailed tomographic model of 3-D P-wave azimuthal anisotropy in the crust and upper mantle beneath the New Madrid seismic zone (NMSZ) using a large number of high-quality arrival-time data of 877 local earthquakes and relative travel-time data of 1511 teleseismic events recorded at 62 USArray stations. The tomographic inversion is conducted by using a limited-memory Broyden–Fletcher–Goldfarb–Shanno algorithm for bound constrained optimization. Because damping regularization is not required in this inversion scheme, the obtained results are less affected by human subjectivity. A prominent low-velocity zone with NE-SW fast velocity directions of azimuthal anisotropy down to ~160 km depth beneath the NMSZ is imaged, which may reflect upwelling mantle materials probably triggered by passage of the Bermuda hotspot from the southwest of the Mississippi embayment. Our results also reveal a subhorizontal high-velocity anomaly around the Moho discontinuity with a width of ~150–200 km, confirming the existence and defining the geometry of a lens-shaped high-density rift pillow near the Moho, which may result from the mantle upwelling. NW-SE fast velocity directions of azimuthal anisotropy appear in the lower crust beneath the Mississippi embayment. This result may reflect recent weakening of a detachment fault above the rift pillow, which drives recurrently sinking of the rift pillow and, as a consequence, causing large repeating intraplate earthquakes in the NMSZ.
abstractGer	We determine a detailed tomographic model of 3-D P-wave azimuthal anisotropy in the crust and upper mantle beneath the New Madrid seismic zone (NMSZ) using a large number of high-quality arrival-time data of 877 local earthquakes and relative travel-time data of 1511 teleseismic events recorded at 62 USArray stations. The tomographic inversion is conducted by using a limited-memory Broyden–Fletcher–Goldfarb–Shanno algorithm for bound constrained optimization. Because damping regularization is not required in this inversion scheme, the obtained results are less affected by human subjectivity. A prominent low-velocity zone with NE-SW fast velocity directions of azimuthal anisotropy down to ~160 km depth beneath the NMSZ is imaged, which may reflect upwelling mantle materials probably triggered by passage of the Bermuda hotspot from the southwest of the Mississippi embayment. Our results also reveal a subhorizontal high-velocity anomaly around the Moho discontinuity with a width of ~150–200 km, confirming the existence and defining the geometry of a lens-shaped high-density rift pillow near the Moho, which may result from the mantle upwelling. NW-SE fast velocity directions of azimuthal anisotropy appear in the lower crust beneath the Mississippi embayment. This result may reflect recent weakening of a detachment fault above the rift pillow, which drives recurrently sinking of the rift pillow and, as a consequence, causing large repeating intraplate earthquakes in the NMSZ.
abstract_unstemmed	We determine a detailed tomographic model of 3-D P-wave azimuthal anisotropy in the crust and upper mantle beneath the New Madrid seismic zone (NMSZ) using a large number of high-quality arrival-time data of 877 local earthquakes and relative travel-time data of 1511 teleseismic events recorded at 62 USArray stations. The tomographic inversion is conducted by using a limited-memory Broyden–Fletcher–Goldfarb–Shanno algorithm for bound constrained optimization. Because damping regularization is not required in this inversion scheme, the obtained results are less affected by human subjectivity. A prominent low-velocity zone with NE-SW fast velocity directions of azimuthal anisotropy down to ~160 km depth beneath the NMSZ is imaged, which may reflect upwelling mantle materials probably triggered by passage of the Bermuda hotspot from the southwest of the Mississippi embayment. Our results also reveal a subhorizontal high-velocity anomaly around the Moho discontinuity with a width of ~150–200 km, confirming the existence and defining the geometry of a lens-shaped high-density rift pillow near the Moho, which may result from the mantle upwelling. NW-SE fast velocity directions of azimuthal anisotropy appear in the lower crust beneath the Mississippi embayment. This result may reflect recent weakening of a detachment fault above the rift pillow, which drives recurrently sinking of the rift pillow and, as a consequence, causing large repeating intraplate earthquakes in the NMSZ.
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title_short	Mapping P-wave azimuthal anisotropy of the New Madrid seismic zone
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up_date	2024-07-06T18:08:14.660Z
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score	7.400982

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Mapping P-wave azimuthal anisotropy of the New Madrid seismic zone

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