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dc.contributor.authorFan, Wenyuan  Concept link
dc.contributor.authorShearer, Peter M.  Concept link
dc.date.accessioned2018-06-28T20:23:50Z
dc.date.available2018-10-25T08:45:27Z
dc.date.issued2018-04-25
dc.identifier.citationJournal of Geophysical Research: Solid Earth 123 (2018): 3147-3159en_US
dc.identifier.urihttps://hdl.handle.net/1912/10427
dc.descriptionAuthor Posting. © American Geophysical Union, 2018. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Solid Earth 123 (2018): 3147-3159, doi:10.1002/2018JB015573.en_US
dc.description.abstractTeleseismic records of the 2012 Mw 7.2 Sumatra earthquake contain prominent phases in the P wave train, arriving about 50 to 100 s after the direct P arrival. Azimuthal variations in these arrivals, together with back‐projection analysis, led Fan and Shearer (2016a, https://doi.org/10.1002/2016GL067785) to conclude that they originated from early aftershock(s), located ∼150 km northeast of the mainshock and landward of the trench. However, recently, Yue et al. (2017, https://doi.org/10.1002/2017GL073254) argued that the anomalous arrivals are more likely water reverberations from the mainshock, based mostly on empirical Green's function analysis of a M6 earthquake near the mainshock and a water phase synthetic test. Here we present detailed back‐projection and waveform analyses of three M6 earthquakes within 100 km of the Mw 7.2 earthquake, including the empirical Green's function event analyzed in Yue et al. (2017, https://doi.org/10.1002/2017GL073254). In addition, we examine the waveforms of three M5.5 reverse‐faulting earthquakes close to the inferred early aftershock location in Fan and Shearer (2016a, https://doi.org/10.1002/2016GL067785). These results suggest that the reverberatory character of the anomalous arrivals in the mainshock coda is consistent with water reverberations, but the origin of this energy is more likely an early aftershock rather than delayed and displaced water reverberations from the mainshock.en_US
dc.description.sponsorshipNational Science Foundation Grant Numbers: EAR-1261681, EAR-1620251; Weston Howland Jr. Postdoctoral Scholarshipen_US
dc.language.isoen_USen_US
dc.publisherJohn Wiley & Sonsen_US
dc.relation.urihttps://doi.org/10.1002/2018JB015573
dc.titleCoherent seismic arrivals in the P wave coda of the 2012 Mw 7.2 Sumatra earthquake : water reverberations or an early aftershock?en_US
dc.typeArticleen_US
dc.description.embargo2018-10-25en_US
dc.identifier.doi10.1002/2018JB015573


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