TGS Seismic Survey Acoustic Detections in Chukchi Sea 2013


Dataset credit

ASRC Energy Services, Inc.
TGS-NOPEC Geophysical Company


Primary contact Troy Nelson TGS-NOPEC Geophysical Company
Secondary contact Megan Blees ASRC Energy Services, Inc.
Data entry Ei Fujioka Duke University



TGS-NOPEC Geophysical Company (TGS) conducted a 2D marine seismic survey along predetermined lines in U.S. Federal and international waters of the Chukchi Sea during the open-water season from 25 August to 30 October 2013. Two vessels were involved including 1) a seismic vessel (Geo Arctic) towing a 3,280 seismic array and 8,100 m long solid streamer cable and 2) a marine mammal monitoring vessel (Norseman) which operated in advance of the seismic vessel. Both vessels had teams of visual protected species observers (PSOs) trained to monitor and implement seismic mitigation according to regulatory permits from U.S. Agencies. Twenty-six detections were made over 1195.5 hours of acoustic monitoring. In addition to acoustic monitoring, the monitoring vessel also employed visual protected species observers (PSOs). This data set includes acoustic detection data and visual sighting data is presented separately.



Supplemental information

In numeric fields, original data may contain 'X' which was replaced with Null.


Cate, J.R., M. Smultea, M. Blees, M. Larson, S. Simpson, T. Jefferson and D. Steckler. 2014. 90-Day Report of Marine Mammal Monitoring and Mitigation during a 2D Seismic Survey by TGS in the Chukchi Sea, August through October 2013. AES Doc. No. 15416-04 13-185. Prepared by ASRC Energy Services, Smultea Environmental Sciences, Clymene Enterprises and Entiat River Technologies for TGS-NOPEC Geophysical Company, National Marine Fisheries Service and U.S> Fish and Wildlife Service. 122 p. + Appendices.



This section explains attributes included in the original dataset. OBIS-SEAMAP restricts the attributes available to the public to date/time, lat/lon and species names/counts only. Should you need other attributes described here, you are encouraged to contact the data provider.

Attributes described below represent those in the original dataset provided by the provider.
Only minimum required attributes are visible and downloadable online. Other attributes may be obtained upon provider's permission.

Attributes in dataset

Attribute (table column)Description
oidUnique ID number (generated by OBIS-SEAMAP)
obs_dateDate of observation
obs_timeTime of First Detection (local time zone)
latitudeLatitude in decimal degrees
longitude_wlongitude (W) in decimal degrees
longitudeLongitude in decimal degrees
sp_obsSpecies name recorded
sp_tsnTaxonomic Serial Number added by OBIS-SEAMAP
certaintyCertainty of Identification
animals_detectedNumber of Animals Detected (contains string)
obs_countNumeric count of animals detected
geomGeometry field added by OBIS-SEAMAP
Marine mammals26
Sea turtles0
Rays and sharks0
Other species0
Non spatial0
Non species0
Date, Begin2012-10-24
Date, End2013-10-27
Temporal prec.111110
Latitude70.70 - 74.27
Longitude-168.76 - -157.53
Coord. prec.5 decimal digits
Data typeAcoustic - group size
Traveled (km)0
Contr. through
Sharing policy CC-BY (Minimum)
Shared with OBIS
GBIF (via DOI)
See metadata in static HTML
See metadata in FGDC XML
See download history / statistics