![]() To arrange for a tour please use the 'General Visitors Link' below. Keeling, who also runs a parallel program at SIO to measure changes in atmospheric O 2 and Ar abundances ( Scripps O. It is currently being continued by Ralph F. The Scripps CO 2 program was initiated in 1956 by Charles David Keeling and operated under his direction until his passing in 2005. ![]() Tour Information for General Public Tours of the Mauna Loa Observatory are performed by appointment only. CO 2 Concentration at Mauna Loa Observatory, Hawaii. Some cameras are observing an area that is off-limits to the general public because of significant volcanic hazards. MLO Menu Mauna Loa Visiting and Tours Due to the COVID pandemic, the Mauna Loa observatory is closed to the public and not giving tours until further notice. The cameras are subject to sporadic breakdown, and may not be repaired immediately. At times, clouds and rain obscure visibility. Thermal webcams record heat rather than light and get better views through volcanic gas. The webcams are operational 24/7 and faithfully record the dark of night if there are no sources of incandescence or other lights. ![]() Thick fume, image pixel size and other factors often result in image temperatures being lower than actual surface temperatures. The temperature scale is in degrees Celsius up to a maximum of 500 degrees (932 degrees Fahrenheit) for this camera model, and scales automatically based on the maximum and minimum temperatures on the caldera floor and not the whole frame, which sometimes results in the rim (bottom of image) looking saturated (white). This image is from a temporary thermal camera located on the north rim of Mauna Loa's summit caldera.
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