The photo above has been cropped here to better show agitation on the pond surfa

The photo above has been cropped here to better show agitation on the pond surface. The agitation could be due to escaping gases from below rising through the water, or from the water boiling, or, perhaps, a combination of both. HVO scientists will better understand what's happening if/when a sample of the water can be collected, which is a logistical challenge given that the pond cannot be reached on foot due to hazardous conditions in the crater. USGS photo by D. Swanson, 08-08-2019.