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30 results for “East Pacific Rise”
Relocated Seismicity Catalogs on the Discovery Transform Fault, 4S on the East Pacific Rise
<p>Two relocated earthquake catalogs are provided for the Discovery Transform Fault located at 4ºS on the East Pacific Rise. There is a microseismicity catalog representing one year of activity recorded during a 2008 ocean bottom seismometer deployment, which includes 12,635 events with local magnitudes, M<sub>L</sub>, between 0 and 4.1. The second catalog includes 24 years (1 January 1990 - 1 April 2013) of earthquakes obtained from the global Centroid Moment Tensor (CMT) catalog, a total of 15 events, with seismic moment magnitudes, M<sub>W</sub>, between 5.4 and 6.0.</p> <p>Microseismicity was relocated using the HypoDD relocation algorithm (Waldhauser, 2001), while the CMT events were relocated using a teleseismic surface-wave cross-correlation technique (McGuire, 2008). The 15 CMT events all relocated into one of five distinct rupture patches on the Discovery Transform Fault. In general, microseismicity was found to be reduced within these large, repeating rupture patches.</p> <p>A more detailed description of the methodology used to relocate both catalogs, as well as a discussion on the correlation between seismic behavior and fault structure on the Discovery Transform Fault is provided in:</p> <p>Wolfson-Schwehr, M., Boettcher, M. S., McGuire, J. J., & Collins, J. A. (2014). The relationship between seismicity and fault structure on the Discovery transform fault, East Pacific Rise. <em>Geochemistry, Geophysics, Geosystems, </em>15(9), 3698–3712. <a href="https://doi.org/10.1002/2014GC005445">https://doi.org/10.1002/2014GC005445</a></p> <p>Seismic Catalogs:</p> <ul> <li>Discovery_CMT_relocated_seismicity_1990_2013.csv</li> <li>Discovery_relocated_microseismicity_2008.csv</li> </ul> <p>Additional References:</p> <p>1. McGuire, J. J. (2008). Seismic cycles and earthquake predictability on East Pacific Rise transform faults. <em>Bulletin of the Seismological Society of America</em>, 98(3), 1067-1084. <a href="https://www.whoi.edu/cms/files/McGuire_BSSA_2008_48643.pdf">https://www.whoi.edu/cms/files/McGuire_BSSA_2008_48643.pdf</a></p> <p>2. Waldhauser, F. (2001). hypoDD--A program to compute double-difference hypocenter locations. <br> <a href="https://academiccommons.columbia.edu/doi/10.7916/D8SN072H">https://academiccommons.columbia.edu/doi/10.7916/D8SN072H</a></p>
FIG. 2. — Nematocarcinus burukovskyi n in Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea, Decapoda, Caridea, Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise
FIG. 2. — Nematocarcinus burukovskyi n. sp., holotype subadult entire animal in lateral view. Scale bar: 10 mm.
FIG. 9. — Nematocarcinus ovalis n in Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea, Decapoda, Caridea, Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise
FIG. 9. — Nematocarcinus ovalis n. sp., holotype ovigerous, HOPE 99, stn 54803#3, NEPR, cl 27.5 mm (MNHN-Na 15765); A, third abdominal somite, dorsal view; B, posterior part of left fifth abdominal pleuron, ventral view, showing inner ridge; C, posteroventral spots and posterior setal pits of sixth abdominal somite, ventral view (setae omitted); D, right antenna, ventral view (setae omitted); E, distal part of left antennal scale, ventral view; F, chela of right first pereopod, lateral view; G, distal part of dactylus of right first pereopod, lateral view; H, chela of left second pereopod, lateral view; I, dactylus and propodus of right third pereopod, lateral view; J, dactylus of right third pereopod, obliquely ventral view. Scale bars: A, D, 5 mm; B, C, F, H, I, J, 1 mm; E, 2 mm; G, 0.5 mm.
FIG. 12 in Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea, Decapoda, Caridea, Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise
FIG. 12. — Nematocarcinus sp., ovigerous, site Genesis, HOT 96, DS Nautile dive 1070, cl 21.4 mm (MNHN-Na 15763); A, third to fifth abdominal somites, lateral view (setae omitted); B, third abdominal somite, dorsal view; C, left fifth abdominal pleuron, lateral view; D, sixth abdominal somite, ventral view (setae omitted); E, posteroventral spots and posterior setal pits, ventral view. Scale bars: A, B, 5 mm; C, D, 2 mm; E, 1 mm.
FIG. 5. — Nematocarcinus burukovskyi n in Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea, Decapoda, Caridea, Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise
FIG. 5. — Nematocarcinus burukovskyi n. sp., holotype subadult, Wormwood vent site, SEPR, cl 18.6 mm (MNHN-Na 15768), left thoracic appendages; A, third maxilliped, lateral view; B, tip of ultimate segment of third maxilliped, mesial view; C, distal two segments of third maxilliped, mesial view; D, first pereopod, lateral view; E, fingers of first pereopod, lateral view; F, second pereopod, lateral view; G, fingers of second pereopod, lateral view; H-J, third to fifth pereopods, lateral view. Scale bars: A, D, F, H-J, 5 mm; B, 0.5 mm; C, 2 mm; E, G, 1 mm.
FIG. 8. — Nematocarcinus ovalis n in Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea, Decapoda, Caridea, Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise
FIG. 8. — Nematocarcinus ovalis n. sp., holotype ovigerous, HOPE 99, stn 54803#3, NEPR, cl 27.5 mm (MNHN-Na 15765); A, rostrum, carapace and cephalic appendages, lateral view (distal part of rostrum, left eye and distal part of left antennal scale broken off; carapace somewhat deformed, thus dorsal notch more accentuated than real); B, anterior part of carapace, rostrum and cephalic appendages, lateral view; C, third abdominal somite to telson and left uropod, lateral view; D, posterior part of fifth abdominal somite and sixth somite, ventral view; E, telson, dorsal view. Scale bars: A-C, 5 mm; D, E, 2 mm.
FIG. 1 in Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea, Decapoda, Caridea, Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise
FIG. 1. — Map of the East Pacific and Antarctic Pacific Rises, showing sampling locations of specimens of Nematocarcinus burukovskyi n. sp., N. ovalis n. sp., and an indeterminate species.
FIG. 11 in Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea, Decapoda, Caridea, Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise
FIG. 11. — Nematocarcinus faxoni Burukovsky, 2001, paratype, off Marias Island, Mexico, cl 25.6 mm (USNM 21139); A, rostrum, anterior part of carapace and cephalic appendages, lateral view; B, posterior part of fifth abdominal somite and sixth somite, ventral view (setae omitted); C, posteroventral spots and posterior setal pits on sixth abdominal somite, ventral view; D, posterior part of right fifth abdominal pleuron, ventral view. Scale bars: A, 5 mm; B, 2 mm; C, D, 1 mm.
FIG. 10. — Nematocarcinus ovalis n in Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea, Decapoda, Caridea, Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise
FIG. 10. — Nematocarcinus ovalis n. sp., holotype ovigerous, HOPE 99, stn 54803#3, NEPR, cl 27.5 mm (MNHN-Na 15765); A, right third maxilliped, lateral view; B, right first pereopod, lateral view; C, merus and ischium of left second pereopod, lateral view; D, chela and carpus of left second pereopod, lateral view; E, merus and ischium of right third pereopod, lateral view; F, dactylus, propodus and carpus of right third pereopod, lateral view. Scale bar: 5 mm.
FIG. 4. — Nematocarcinus burukovskyi n in Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea, Decapoda, Caridea, Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise
FIG. 4. — Nematocarcinus burukovskyi n. sp., holotype subadult, Wormwood vent site, SEPR, cl 18.6 mm (MNHN-Na 15768), appendages dissected from left; A, mandible, dorsal view; B, same, ventral view; C, same, distal part of molar process, dorsal view; D, maxillule, ventral view (coxal endite partly broken); E, maxilla, ventral view; F, first maxilliped, ventral view (coxal endite broken); G, second maxilliped, ventral view; H, antenna, ventral view; I, prominences on sixth to eighth thoracic sternites, ventral view; J, appendix masculina and appendix interna of second pleopod, mesial view; K, posterolateral part of exopod of uropod, dorsolateral view. Scale bars: A-D, J, 0.5 mm; E-I, 2 mm; K, 1 mm.
FIG. 3. — Nematocarcinus burukovskyi n in Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea, Decapoda, Caridea, Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise
FIG. 3. — Nematocarcinus burukovskyi n. sp., holotype subadult, Wormwood vent site, SEPR, cl 18.6 mm (MNHN-Na 15768); A, rostrum and carapace, lateral view (setae omitted); B, rostrum, anterior part of carapace and cephalic appendages, lateral view; C, posterior part of third abdominal somite to telson and left uropod, lateral view; D, sixth abdominal somite and posterior part of pleuron of fifth somite, slightly obliquely ventral view (setae omitted); E, telson, dorsal view; F, posterior part of telson, dorsal view. Scale bars: A, C, 5 mm; B, D, E, 2 mm; F, 1 mm.
FIG. 6. — Nematocarcinus burukovskyi n in Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea, Decapoda, Caridea, Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise
FIG. 6. — Nematocarcinus burukovskyi n. sp., holotype subadult, Wormwood vent site, SEPR, cl 18.6 mm (MNHN-Na 15768); A, third abdominal somite, dorsal view; B, left fifth pleuron, lateral view (setae omitted); C, right fifth pleuron, lateral view; D, epipod on third maxilliped, lateral view; E, chela of first pereopod, lateral view; F, I, J, dactyli and propodi of third to fifth pereopod, lateral view; G, dactylus and distal part of propodus of third pereopod, lateral view (dorsodistal distal setae propodus omitted); H, dactylus of third pereopod, dorsal view; K, dactylus and distal part of propodus, proximolateral view; L, dactylus of fifth pereopod, dorsal (extensor) view. Scales: A, B, C, 2 mm; E, F, I, J, 1 mm; G, D, H, K, L, 0.5 mm.
FIGURE 5 in Two new species of Ostracoda from hydrothermal vents of Riftia pachyptila aggregations on the East Pacific Rise (Halocypridina; Cladocopina)
FIGURE 5. Archiconchoecia chavturi, new species, adult female, holotype: A, right mandible, mv; B, endopod left mandible, lv; C, part basis and endopod left mandible, lv; D, part coxa and basis right mandible, mv; E, coxa endite right mandible as seen through basis (indistinct), lv. (lv = lateral view; mv = medial view.)
FIGURE 8 in Two new species of Ostracoda from hydrothermal vents of Riftia pachyptila aggregations on the East Pacific Rise (Halocypridina; Cladocopina)
FIGURE 8. Archiconchoecia chavturi, new species, adult female, holotype: eggs and spermatheca on lower right and detail of spermatheca showing threadlike sperm on upper left.
FIGURE 12 in Two new species of Ostracoda from hydrothermal vents of Riftia pachyptila aggregations on the East Pacific Rise (Halocypridina; Cladocopina)
FIGURE 12. Polycopetta pax, new species, adult female, holotype: A, left maxilla, lv (nabs); B, right maxilla drawn on body, lv (nabs); C, exopod right maxilla, lv; D, precoxal endite I of maxilla, anterior to left; E, 5th limb. (lv = lateral view; nabs = not all bristles shown.)
FIGURE 11 in Two new species of Ostracoda from hydrothermal vents of Riftia pachyptila aggregations on the East Pacific Rise (Halocypridina; Cladocopina)
FIGURE 11. Polycopetta pax, new species, adult female, holotype: A, right mandible (coxale endite missing) lv; B, left mandible, mv; C, right maxilla, mv. (lv = lateral view; mv = medial view.)
FIGURE 1 in Two new species of Ostracoda from hydrothermal vents of Riftia pachyptila aggregations on the East Pacific Rise (Halocypridina; Cladocopina)
FIGURE 1. Archiconchoecia chavturi, new species, adult female, holotype, length 0.60 mm: A, complete specimen from right side; B, right valve, iv; C, left valve, iv; D, lateral view of posterior end of carapace showing both valves (detail from 2A); E, ventral view of anterior of carapace with valves partly open. (iv = inside view.)
FIGURE 13 in Two new species of Ostracoda from hydrothermal vents of Riftia pachyptila aggregations on the East Pacific Rise (Halocypridina; Cladocopina)
FIGURE 13. Polycopetta pax, new species, adult female, holotype: A, posterior of body from right side showing unextruded eggs (claws of furca missing); B, upper lip and esophagus.
FIGURE 6 in A new species of deepsea Tegastidae (Crustacea: Copepoda: Harpacticoida) from 9 ° 50´N on the East Pacific Rise, with remarks on its ecology *
FIGURE 6. Smacigastes barti sp. nov ♂ paratype 1 LM drawing: A, habitus, lateral; B, antennule; paratype 8 copepodite stage V LM drawings: C, leg 2; D, leg 3. Scale bars A–D 50 µm.
FIGURE 4 in A new species of deepsea Tegastidae (Crustacea: Copepoda: Harpacticoida) from 9 ° 50´N on the East Pacific Rise, with remarks on its ecology *
FIGURE 4. Smacigastes barti sp. nov. Ψ holotype LM drawings: A, leg 1; B, leg 2; C, leg 3; D, leg 4. Scale bars A–D 50 µm.
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