In the South Pacific, south of Late Island along the Tofua volcanic arc in Tonga, a new volcanic island Home Reef is being re-born. The island is thought to have emerged after a volcanic eruption in mid-August that has also spewed large amounts of floating pumice into Tongan waters and sweeping across to Fiji about 220 miles to the west of where the new island has formed. This simulated natural color image shows the vegetation-covered stratovolcanic island of Late in the upper right. Home Reef is found in the lower left. The two bluish plumes are hot seawater that is laden with volcanic ash and chemicals; the larger one can be traced for more 8.4 miles to the east. The image was acquired October 10, 2006 by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) one of five Earth-observing instruments launched December 18, 1999, on NASA's Terra satellite.The broad spectral coverage and high spectral resolution of ASTER will provide scientists in numerous disciplines with critical information for surface mapping and monitoring dynamic conditions and temporal change.

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達志影像

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