1. Department of Geology and Geochemistry; Stockholm University; Stockholm; Sweden
2. Center for Coastal and Ocean Mapping; University of New Hampshire; Durham; New Hampshire; USA
3. Science Applications International Corporation; Poulsbo; Washington; USA
4. Hawaii Institute of Geophysics and Planetology; University of Hawaii at Manoa; Honolulu; Hawaii; USA
5. Alfred Wegener Institute; Bremerhaven; Germany