Nikolski 54 mi (86 km) NE Unalaska 167 mi (269 km) NE Atka 176 mi (283 km) SW Akutan 203 mi (327 km) NE Anchorage 954 mi (1535 km) NE
From Wood and Kienle (1990) : "Herbert is a classic stratovolcano with a 2.1-km-wide caldera, which the topographic map indicates is breached to the northwest. Radar images do not show the breach. No geologic studies have been published on this volcano. A grab sample from the tip of the island's southwest point is an andesite (59% SiO2, with 0.82% K2O)."