Sarah Henton preparing to sample the "black ooze" floating on the surface of Upper Klawasi mud volcano, seen here just beyond the tire tube. The central upwelling is directly behind Sarah, and is between intervals of vigorous activity [see images #32182, #32232].
Image courtesy of AVO/USGS.
Please cite the photographer and the Alaska Volcano Observatory / U.S. Geological Survey when using this image.
To obtain a high-resolution image, open the full size
page. Then, right click on the image and click
"Save Image As..." or "Save Picture as..."