TY - JOUR
T1 - The eastern North American margin community seismic experiment
T2 - An amphibious active- And passive-source dataset
AU - Lynner, Colton
AU - Van Avendonk, Harm J.A.
AU - Bécel, Anne
AU - Christeson, Gail L.
AU - Dugan, Brandon
AU - Gaherty, James B.
AU - Harder, Steven
AU - Hornbach, Matthew J.
AU - Lizarralde, Daniel
AU - Long, Maureen D.
AU - Magnani, M. Beatrice
AU - Shillington, Donna J.
AU - Aderhold, Kasey
AU - Eilon, Zachary C.
AU - Wagner, Lara S.
N1 - Funding Information:
The authors thank all of the volunteer participants, the ocean-bottom seismometer (OBS) technicians from Woods Hole Oceanographic Institution (WHOI) and Scripps Institution of Oceanography (SIO), the crews of the R/V Marcus G. Langseth and R/V Endeavor, and all those who contributed to the eastern North American margin community seismic experiment (ENAM-CSE) concept. The authors thank many people, schools, companies, and state and local governmental institutions that gave them permission to install seismic stations onshore and undertake onshore seismic shooting. The OBS instruments came from the U.S. Ocean Bottom Seismic Instrument Pool (OBSIP). Onshore stations were provided by Incorporated Research Institutions for Seismology–Program for the Array Seismic Studies of the Continental Lithosphere (IRIS-PASSCAL) instrument center. Several figures were made using Generic Mapping Tools (GMT; Wessel and Smith, 1999). Data collection was supported by the National Science Foundation (NSF) through the Geodynamic Processes at Rifting and Subducting Margins (GeoPRISMS) program. This work and the ENAM-CSE were funded by NSF Grant Numbers EAR-1753759, EAR-1753722, OCE-1348454, OCE-1347498, OCE-1348124, OCE-1348228, OCE-1348934, OCE-1348342, OCE-1347310, and OCE-1347024. The authors thank three anonymous reviewers for useful comments.
Funding Information:
used in the 2014 onshore–offshore field campaign (Fig. 1). They were first deployed along the southern ENAM-CSE line then along the northern line. A total of 11 land-based 182 kg shots, provided by the U.S. National Science Foundation (NSF)-funded seismic source facility at University of Texas El Paso, were recorded by the Texan array, five shots along the northern line and six shots along the southern line. An example of the explosion seismic data (Fig. 4) shows very clear deep-crustal and mantle seismic refractions.
Publisher Copyright:
© Seismological Society of America.
PY - 2019
Y1 - 2019
N2 - The eastern North American margin community seismic experiment (ENAM-CSE) was conceived to target the ENAM Geodynamic Processes at Rifting and Subducting Margins (GeoPRISMS) primary site with a suite of both active- and passive-source seismic data that would shed light on the processes associated with rift initiation and evolution. To fully understand the ENAM, it was necessary to acquire a seismic dataset that was both amphibious, spanning the passive margin from the continental interior onto the oceanic portion of the North American plate, and multiresolution, enabling imaging of the sediments, crust, and mantle lithosphere. The ENAM-CSE datasets were collected on- and offshore of North Carolina and Virginia over a series of cruises and land-based deployments between April 2014 and June 2015. The passive-source component of the ENAM-CSE included 30 broadband ocean-bottom seismometers (OBSs) and 3 onshore broadband instruments. The broadband stations were deployed contemporaneously with those of the easternmost EarthScope Transportable Array creating a trans-margin amphibious seismic dataset. The active-source portion of the ENAM-CSE included several components: (1) two onshore wide-angle seismic profiles where explosive shots were recorded on closely spaced geophones; (2) four major offshore wide-angle seismic profiles acquired with an airgun source and short-period OBSs (SPOBSs), two of which were extended onland by deployments of short-period seismometers; (3) marine multichannel seismic (MCS) data acquired along the four lines of SPOBSs and a series of other profiles along and across the margin. During the cruises, magnetic, gravity, and bathymetric data were also collected along all MCS profiles. All of the ENAM-CSE products were made publicly available shortly after acquisition, ensuring unfettered community access to this unique dataset.
AB - The eastern North American margin community seismic experiment (ENAM-CSE) was conceived to target the ENAM Geodynamic Processes at Rifting and Subducting Margins (GeoPRISMS) primary site with a suite of both active- and passive-source seismic data that would shed light on the processes associated with rift initiation and evolution. To fully understand the ENAM, it was necessary to acquire a seismic dataset that was both amphibious, spanning the passive margin from the continental interior onto the oceanic portion of the North American plate, and multiresolution, enabling imaging of the sediments, crust, and mantle lithosphere. The ENAM-CSE datasets were collected on- and offshore of North Carolina and Virginia over a series of cruises and land-based deployments between April 2014 and June 2015. The passive-source component of the ENAM-CSE included 30 broadband ocean-bottom seismometers (OBSs) and 3 onshore broadband instruments. The broadband stations were deployed contemporaneously with those of the easternmost EarthScope Transportable Array creating a trans-margin amphibious seismic dataset. The active-source portion of the ENAM-CSE included several components: (1) two onshore wide-angle seismic profiles where explosive shots were recorded on closely spaced geophones; (2) four major offshore wide-angle seismic profiles acquired with an airgun source and short-period OBSs (SPOBSs), two of which were extended onland by deployments of short-period seismometers; (3) marine multichannel seismic (MCS) data acquired along the four lines of SPOBSs and a series of other profiles along and across the margin. During the cruises, magnetic, gravity, and bathymetric data were also collected along all MCS profiles. All of the ENAM-CSE products were made publicly available shortly after acquisition, ensuring unfettered community access to this unique dataset.
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U2 - 10.1785/0220190142
DO - 10.1785/0220190142
M3 - Article
AN - SCOPUS:85077115009
SN - 0895-0695
VL - 91
SP - 533
EP - 540
JO - Seismological Research Letters
JF - Seismological Research Letters
IS - 1
ER -