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Posts tagged Idaho

Volcanic Events in Craters of the Moon National Monument, USA

43.4N 113.5W

June 16th, 2013 Category: Volcanoes MODISTerra

USA – June 15th, 2013

Craters of the Moon National Monument, in Idaho, visible here as an upside-down V-shaped brown area on the right side of the image, is a vast ocean of lava flows with scattered islands of cinder cones and sagebrush. Volcanic events were reported in the area on June 15th, and are expected to continue today.

Between 15,000 and 2,000 years ago, the Craters of the Moon Lava Field formed during eight major eruptive periods. During this time the Craters of the Moon lava field grew to cover 618 square miles. The Wapi and Kings Bowl lava fields formed contemporaneously about 2,200 years ago.

Currently, this region is experiencing basin and range type faulting, which is stretching or pulling apart the crust. The Lost River Range north of the town of Arco provides good evidence that these forces are still active. In 1983 these forces caused a magnitude 6.9 earthquake, during which Mount Borah rose about 1 foot and the Lost River Valley in that vicinity dropped about 8 feet.

On the Eastern Snake River Plain, rather than producing mountain ranges, the tensional forces have caused decompression melting, which results in dike emplacement and periodic eruption of molten rock onto the surface. As long as these forces continue to act, more eruptions will occur.

Smoke Over Nez Perce National Forest, Idaho, USA – October 8th, 2012

46.4N 116.6W

October 8th, 2012 Category: Fires, Image of the day

USA – October 7th, 2012

Smoke hangs over the Nez Perce National Forest in central western Idaho, in the northwestern United States. The forest is bounded on the east by the state of Montana, on the north by the Palouse region, and on the south and west by the Clearwater National Forest. It has a total area of 2,224,091 acres (3,475.14 sq mi or 9,000.58 km2). Dry conditions in the northern and western USA are making it difficult to contain forestfires.

Smoke from Wildfires Hangs Over Idaho Mountains

45.5N 116.8W

October 5th, 2012 Category: Fires

USA – October 5th, 2012

Wildfires continue to rage in northern and western USA in early October, mostly due to lack of rain. Here, smoke from wildfires in Idaho, near the Washington-Oregon border, looms over forests and rests in the valleys between mountain ridges. Other blazes can also be observed in Washington, near the Oregon border, in the upper left quadrant, releasing smoke that blows to the west.

Fires in Mountains North of Great Salt Lake, Western USA

42.6N 112.9W

September 24th, 2012 Category: Fires

USA – September 5th, 2012

Fires blazing near the Idaho-Montana border release plumes of smoke that blow due eastward (click here for previous images). While the fires appear to be located in mountainous, forested terrain, land of a more arid nature can be observed to the south, near the Great Salt Lake and Great Salt Lake Desert, in Utah, and in Nevada.

Smoke From Western USA Fires Fills Valleys

45.4N 112.7W

September 23rd, 2012 Category: Fires

USA – September 3rd, 2012

Smoke from fires in western USA enters the crevices of valleys and rivers between mountain ridges. The western fire season continues, with over 7 million acres by the end of August. While the number of fires is down from the 10-year average of 54,209, the acreage affected is well above the average of 5.4 million acres. The fires have been quite large, particularly in Idaho and Montana, and the cost to fight them continues to rise (click here for previous images).