BackgroundZarechny is a low, forested volcano constructed in the lake-filled lowlands between Kliuchevskoi and Shiveluch volcanoes, and immediately S of Kharchinsky volcano. The 760-m-high edifice contains two nested calderas, both breached widely to the SE. The larger 4.5 x 3.7 km wide caldera is filled by an uneroded cone truncated by a 3.2 x 1.8 km wide caldera. Both horseshoe-shaped calderas resemble those produced by edifice failure, but deposits related to their origin are buried beneath younger Holocene deposits in the Kamchatka River valley. Zarechny was at one point considered to be of Holocene age (Erlich, 1986), but more recent tephrochronology has shown that the older edifice precedes formation of 23,000-24,000 year old glacial moraines, and that the younger inner edifice ceased activity during the late Pleistocene (Volynets et al., 1999).
Source: Smithsonian / GVP volcano information
See also: Sentinel hub | Landsat 8