earthstory reblogged
Sunflare over Anchorage taken on the evening of the summer solstice 2019.
Original caption:
Footage I've shot over the years in Alaska where I was born and raised. Alaska is so beautiful, go if you get a chance! Footage I've shot over the years in Alaska where I was born and raised.
Alaska is so beautiful, go if you get a chance!
Locations:
Seward, Resurrection Bay https://www.alaskacollection.com/day-tours/kenai-fjords-tours/resurrection-bay-tour/
Tern Lake http://www.alaska.org/detail/tern-lake
Point Woronzof Park http://www.alaska.org/detail/point-woronzof-park
Flat Top Mountain, Anchorage http://www.alaska.org/detail/flattop-mountain
Hatcher Pass http://www.alaska.org/detail/hatcher-pass
Gear: Canon 5D Mark 3 Phantom 4 Canon XA10 Iphone X
Railway in Alaska
mustdotravels Scenic view of Matanuska -Susitna Borough.
This video definitely comes across as “Car commercial”, but the scenery in it really is worth it. 3000 kilometer trip from Whitehorse, Canada to Anchorage, Alaska
natgeotravel Video by @tobyharriman // Within a five or so minute drive outside of Anchorage, Alaska, you can be in some of the most incredible mountains. This particular area is a favorite of mine, and if you decide to drive a bit farther north to Hatcher Pass (which is a short hour or so trip), you will be treated to some of the most pristine landscapes in the area. From gorgeous roadside views to even more breathtaking scenes if you decide to backpack deeper in, it's absolutely worth the trip. These #timelapse shots were taken over the past few weeks in 8K resolution. My favorite part: I love seeing the clouds and light playing with the mountains and valleys. Music @jteveringham
natgeotravel Video by @tobyharriman// Portage Lake, an hour drive from Anchorage, is a glacial body of water in the Chugach National Forest of Alaska. It sits in a long, heavily glaciated valley, which is fairly common up here. I have come up this way a few times, but the weather never panned out the previous times through. This night was an special exception and a timelapse goldmine!
natgeotravel Video by @tobyharriman// One of my favorites drives up here in Alaska is the trip from Anchorage to Valdez. It's a beautiful six-hour drive that you can turn into a full day trip thanks to numerous stops along the way featuring mountains, wildlife and glaciers in just about every direction you look. One notable spot is in Thompson Pass known as the Worthington Glacier. It is a 5,774-acre valley glacier and is definitely worth a stop.
This view is just outside of Anchorage, Alaska
Here’s a Seismic Simulation - putting a high rise building into code, applying an Earthquake of the power of one observed earlier this year in Alaska, and modeling how much shifting and twisting each part of the building undergoes during the shaking. Simulations like this are key for keeping building standing during powerful quakes.
This is literally a snow train. This train, leaving Fairbanks Alaska, is carrying carts full of snow. It is heading to Anchorage Alaska, where it will help make up part of the Iditarod dog race - its been so warm in Anchorage that they don’t have enough snow to start the race, they’re bringing it in by train from farther north.
Point Wonzorof - a beach park near Anchorage, Alaska.
On Sunday, there was a magnitude 7.1 earthquake in the subduction zone beneath Alaska. This computer simulation shows the waves generated by that earthquake and how they propagated away from the epicenter. Note how the Cook Inlet, a sedimentary basin, concentrates the energy and just rattles back and forth - a common state for sedimentary basins and a major reason why cities built in those basins suffer damage during earthquake.
Shaking in a garage during the Anchorage, AK earthquake over the weekend.
A strong earthquake struck Alaska south of Anchorage on Sunday. This video was taken by a homeowner during the quake. Don’t quite recommend “Moving around” this much during a quake.
Some more remarkable footage of the damage after the Great Alaskan Earthquake of 1964
The Great Alaskan Earthquake On Good Friday, March 27 1964 at 5:32 p.m. local time, something snapped beneath the southern coastline of Alaska. The ground began to churn and lurch from side to side, tossing around anything that could be moved. It took over four minutes for the shaking to stop, and that was just the beginning of the tragedy. Aftershocks continued for weeks afterwards, and then there were the tsunami waves and liquefaction. Today is the 50th anniversary of the Great Alaskan Earthquake of 1964, which killed an estimated 139 people. According to the US Geological Survey, it still ranks as the 2nd strongest earthquake in recorded history – surpassed only by the earthquake in Chile, 1960, and it was the strongest earthquake in North American history – a key point since North America is the location of a whole lot of seismic instrumentation. The earthquake occurred on the Aleutian Megathrust – what we now understand to be a subduction zone. Off Alaska’s coastline, the Pacific Ocean plate is pushed down into Earth’s mantle. Where it runs into Alaska’s continental landmass, the plates push against each other as the rocks of the Pacific plate are bent and shoved downwards. Those stresses build up enormous amounts of energy over time. The Pacific Plate is sliding north at about 6 centimeters a year – not a whole lot on its own, but over 100 years, enough to move by more than 6 meters. This motion builds up frictional forces and energy as the plates grind together, bending and twisting the surrounding rocks until they can take no more. It takes 100’s of years to build up the stress of an earthquake – but imagine bending rocks in an arc by 20 meters or more and suddenly releasing all that energy – that’s a megathrust earthquake. When the rocks break, they snap back to their original positions across a wide fault plane – the fault rupture during the Alaskan Earthquake was about 1000 kilometers long. The bigger the fault plane, the more energy it can lock up until breaking. Megathrust earthquakes take place on shallowly dipping planes, making them able to lock up enormous amounts of energy which is released when a quake takes place. I’ll cover a couple other aspects of this quake in my next posts. -JBB Image credit: http://en.wikipedia.org/wiki/File:AlaskaQuake-FourthAve.jpg Read more: http://www.usgs.gov/blogs/features/usgs_top_story/the-1964-great-alaska-earthquake-tsunami/ http://earthquake.usgs.gov/earthquakes/world/10_largest_world.php