NASA: Russia - Kamchatka Peninsula - Monochromatic Lava Fields on Tolbachik Volcano - 11-06.13
Posted by Ricardo Marcenaro | Posted in NASA: Russia - Kamchatka Peninsula - Monochromatic Lava Fields on Tolbachik Volcano - 11-06.13 | Posted on 13:46
acquired June 6, 2013
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acquired June 6, 2013
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In visible light (top image), fresh lava flows are difficult to distinguish from the black rock of Tolbachinsky Dol,
a volcanic plateau on Russia’s Kamchatka Peninsula. The high altitude
and northern latitude of the plateau (as far north as Moscow) preserve
the barren landscape left behind by past eruptions. In contrast, the
fresh lava stands out clearly against the vivid green of low-elevation
meadows and forest.
On the plateau itself, the only color is near the summits of
scattered cinder cones. The cones form around volcanic vents and are
exposed to escaping volcanic gases in the course of an eruption. The
gases react with the iron-rich lava cinders, essentially rusting the
rocks. Sunset Crater in Arizona is named for the colorful end result of this process.
Shortwave infrared and near-infrared light (combined with green light
in the lower, false-color image) highlight another aspect of
Tolbachinsky Dol—the ongoing eruption of Tolbachik Volcano. Hot surfaces
glow in shortwave infrared wavelengths. The active vent and lava flow
are bright red, along with scattered lava “breakouts”at the front of the
flow. High temperature surfaces in the scene also glow in near infrared
light, revealing a lava pond in the active vent and fluid lava in the
center of the lava flow.
These images were collected by the Advanced Land Imager (ALI) on the Earth Observing-1 (EO-1) satellite on June 6, 2013.
References
- Doubika, P., & Hill, B. E. (1999, July) Magmatic and hydromagmatic conduit development during the 1975 Tolbachik Eruption, Kamchatka, with implications for hazards assessment at Yucca Mountain, NV. Journal of Volcanology and Geothermal Research, 91 (1), 43–64.
- Kamchatka Volcanic Eruption Response Team (2013, June 6) Kamchatkan and Northern Kuriles Volcanic Activity. Accessed June 7, 2013.
NASA Earth Observatory image by Jesse Allen and Robert Simmon, using EO-1 ALI data from the NASA EO-1 team. Caption by Robert Simmon.
- Instrument:
- EO-1 - ALI
NASA: Russia - Kamchatka Peninsula - Monochromatic Lava Fields on Tolbachik Volcano - 11-06.13
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