The "Alucia" has arrived in the proposed search area, and my interpretation of press releases is that the search will commence in the north sector of the 20NM radius circle and progress southwards. A reposting of a previous BEA graphic with additional enhancements will provide a general indication of the area the "Alucia" will now be working in.
EDIT :: For clarification, the yellow circles are drawn at multiples of 10NM radii from the Last Known Position. The initial Phase 4 search is concentrating within 20NM radius of the LKP, and the remaining area out to 40NM will eventually be searched if required.