On August 10, 2013, the Operational Land Imager (OLI) on Landsat 8 captured this false-color image of the burn scar left by the Silver fire, which burned in southern California, just south of Banning.
The image was made with a combination of shortwave infrared, near infrared, and green light collected by OLI. Shortwave infrared is between near infrared (seen in infrared photography) and thermal infrared light (used by temperature sensors) on the electromagnetic spectrum. Shortwave infrared light is reflected by some surfaces (like bare soil), and emitted by very hot objects (lava or fires). Burned areas appear dark red. The lighter red area in the upper left of the image is a burn scar from a previous fire. Dark green areas are forests; light green areas are grasslands, golf courses, or yards.
The fire started on August 12, 2013. By the time firefighters had contained the blaze, it had burned about 20,000 acres (8,000 hectares), forced thousands to evacuate their homes, injured eight people, and destroyed 46 structures. As of August 22, wildfires had burned 3.4 million acres in the United States, making 2013 somewhat less active than other recent years. Over the last decades, fires had charred an average 5.7 million acres by August 22, according to statistics published the National Interagency Fire Center.
References
- Cal Fire (2013, August 12) Silver Fire. Accessed August 23, 2013.
Further Reading
- Los Angeles Times (2013, August 11) Silver fire: 8 injured, nearly 20,000 acres burned. Accessed August 23, 2013.
- NBC Nightly News (2013, August 9) On the frontlines of the fast-moving Silver Fire Accessed August 23, 2013. .
References & Resources
NASA Earth Observatory image by Jesse Allen and Robert Simmon, using EO-1 ALI data provided courtesy of the NASA EO-1 team. Caption by
