Sentences with phrase «rock avalanches»

Photograph taken from a Colorado National Guard helicopter looking north down the West Salt Creek rock avalanche deposit.

Left images upper and lower: Head of the West Salt Creek rock avalanche near the end of the 2015 spring snowmelt season.

The second rock avalanche is orange in color, both from bedrock and from waste rock from mining.

The results of this study can be applied to rock avalanche modeling and warning, monitoring of ongoing hazards at the site, and interpreting the emplacement velocity of paleo - landslide deposits.

On 25 May 2014, a rain - on - snow - induced rock avalanche occurred in the West Salt Creek valley on the northern flank of Grand Mesa in western Colorado (United States).

Following an unusual spring heatwave across Europe in 2007, the Alpine mountain suffered a spectacular rock avalanche, in which 300,000 cubic metres of rock fell, landing in a dry seasonal lake.

These processes are typical in a steep landscape where rock avalanches and landslides supply large volumes of boulders and material.

While no one was present to measure the speed, rock avalanches typically move about 70 mph to 110 mph, while the fastest moved a quickly as 220 mph.

The slide occurred in the form of two huge rock avalanches at 9:30 p.m. and 11:05 p.m. MDT at Rio Tinto - Kennecott Utah Copper's open - pit Bingham Canyon Mine, 20 miles southwest of downtown Salt Lake City.

The researchers don't know why the slide happened as two rock avalanches instead of one, but Moore says, «A huge volume like this can fail in one episode or in 10 episodes over hours.»

The first rock avalanche included grayer bedrock material seen around the margins of the lower half of the slide.

September 14, 2000 Arenal Volcano erupted furiously with lava and incandescent rock avalanches and sent out a cloud of ash which covered several nearby villages.

In those summaries, the language states: «Glacier melt in the Himalayas is projected to increase flooding, and rock avalanches from destabilized slopes, and to affect water resources within the next two to three decades.

The second rock avalanche was followed immediately by a real earthquake measuring 2.5 in Richter magnitude and 3.0 in coda magnitude, then three smaller quakes — all less than one - half mile below the bottom of the mine pit.

On 25 May 2014, movement of the rock - slide slump block mobilized the rock avalanche that traveled down the West Salt Creek valley.

On 25 May 2014, the central core of the rock avalanche deposit continued to move for 1 - 2 hours after the main rock avalanche deposit had stopped moving.

Over the last decade, rock avalanches and landslides have become more common in high mountain ranges, apparently coinciding with the increase in exceptionally warm periods (see «Early signs»).

Rock avalanches and torrents started to form V - shaped valleys in the Swiss Alps approximately 25 million years ago.

The seismic and infrasound recordings suggest the two rock avalanches were similar in volume, but photos indicate the first slide contained more bedrock, while the second slide contained a higher proportion of mined waste rock — although both avalanches were predominantly bedrock.

Pankow says the larger magnitudes more accurately reflect the energy released by the rock avalanches, but the smaller Richter magnitudes better reflect what people felt — or didn't feel, since the Seismograph Stations didn't receive any such reports.

The landslide's two rock avalanches were not earthquakes but, like mine collapses and nuclear explosions, they were recorded on seismographs and had magnitudes that were calculated on three different scales:

Last year's gigantic landslide at a Utah copper mine probably was the biggest nonvolcanic slide in North America's modern history, and included two rock avalanches that happened 90 minutes apart and surprisingly triggered 16 small earthquakes, University of Utah scientists discovered.

The slide happened in the form of two rock avalanches 95 minutes apart.

So in terms of ground movements people might feel, the rock avalanches «felt like 2.5,» Pankow says.

Each rock avalanche lasted about 90 seconds.

Both seismic and infrasound recordings detected differences between the landslide's two rock avalanches.

Over the last decade, rock avalanches and landslides have become more common in high mountain ranges, apparently coinciding with the increase in exceptionally warm periods.

Glacier melt in the Himalayas is projected to increase flooding and rock avalanches, and affect water resources within the next two to three decades.