This map, prepared by the Iceland Met Office, shows the approximate location of the dike, as of Nov. 12. Shown in red, the dike is approximately 9.5 miles (15 kilometers) long and is closest to the surface near Sundhnúkur Craters, at only one-half a mile (800 meters) deep. Note how close the magma body is to critical infrastructure, such as the Svartsengi Power Station, and the popular Blue Lagoon geothermal spa. Credit: Icelandic Meteorological Office, public domain, annotated by Melissa Scruggs