Paths taken by REMUS 100 vehicles in Lake Rotomahana, New Zealand. Each REMUS was programmed to follow a back-and-forth track to survey areas of the lake floor—what researchers call "mowing the lawn." Instruments mounted on the REMUS mapped the lake floor and found evidence of hard features there; measured pH, temperature, depth, turbidity, and other water properties; and detected magnetic anomalies. The research team surveyed most of the lake but directed more attention to its western portion, where they found evidence that part of the Pink Terraces geothermal system survived the eruption and is still active under the lake floor; and the area near the northwest shoreline, where they suspected the Pink Terraces lay buried under sediment. (Courtesy of Amy Kukulya, Oceanographic Systems Laboratory, WHOI)[back]
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