1. Department of Geology and Geophysics; University of Hawai'i; Honolulu; Hawaii; 96822; USA
2. Hawaiian Volcano Observatory; U.S. Geological Survey; Hawai'i National Park; Hawaii; 96718; USA
3. Department of Geosciences; University of Massachusetts; Amherst; Massachusetts; 01003; USA
4. Research School of Earth Sciences; Australian National University; Canberra; ACT; 0200; Australia
5. Department of Earth and Ocean Sciences; University of British Columbia; Vancouver; BC; Canada V6T 1Z4
6. Woods Hole Oceanographic Institution; Woods Hole; Massachusetts; 02543; USA
7. Laboratorie des Sciences du Climat et de l'Environnement Domaine du CNRS; F-91198; Gif sur Yvette; France