3 month deployment of 30 ocean bottom seimographs in the Lau backarc and Tonga forarc during late 1994. The goals of the project were to image the upper mantle structure assoicated with the subducting Tonga slab and the active Lau backarc spreading center, thereby to determine evidence for phase changes in the slab and sources of back arc magmas
EarthScope Consortium operates the
NSF Geodetic Facility for the Advancement of Geoscience (GAGE)
and NSF Seismological Facility for the Advancement of Geoscience (SAGE).
Any opinions, findings and conclusions, or recommendations expressed
in this material do not necessarily reflect the views of the
U.S. National Science Foundation.