REPORT DATE: 08-27-2018
REPORT TIME: 1345 UTC
REGION: PACIFIC
SUB REGION: ALASKA
AREA/BLOCK: St. George Basin  7060 
IMAGE DATE: 08-27-2018
IMAGE TIME: 0504 UTC
DATA SOURCE: SENTINEL1B 
MODE: Interferometric Wide (IW) VV
RESOLUTION: 5x20 meter
LOCATION: 56°04'34" N/170°14'07" W
AREA: 11.65 square kilometers (Updated 05/26/2020)
CONFIDENCE: Medium
REMARKS: Possible oil was observed in satellite imagery. This anomaly is unconfirmed as oil. It was clearly associated with a vessel, not believed to be a wake, and measured approximately 25 nmi long by 0.25 nmi wide on average. A portion of the feature exhibited feathering, and was consistent with satellite derived winds from the WSW at 10-15 knots. It had good contrast against the ocean background and was removed from natural phenomena. The edges were moderate to very diffuse.   

UNCERTAINTIES: The anomaly lacked appreciable widening with distance and sharp well defined edges, 2 characteristics that are often observed in oil slicks. The anomaly looked very similar to those in confirmed cases of surface films associated with fishing activity. However, pollution could not be ruled out.   

ANALYST: RAMIREZ
Maps and shapefiles can be accessed at: www.ospo.noaa.gov/Products/ocean/marinepollution/

ERMA: https://erma.noaa.gov/arctic/erma.html#/layers=1+46644&x=-170.287074&y=56.0955315&z=11&panel=layer

For further information on oil spill response and assessment go to: https://response.restoration.noaa.gov/oil-and-chemical-spills/oil-spills

If you would like to share any feedback about this report or have questions, please contact the operational analyst at (301) 683-1403 or send to oceanmap@noaa.gov. Email alerts are available only for federal and state government officials involved in response efforts. Requests to be added to the email alerts should also be sent to oceanmap@noaa.gov. Please allow up to 2 business days to process the request.