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On Facebook, longtime resident Mike Lewis said it was the strongest quake he’s ever felt, too. Lewis posted a picture of his kitchen, strewn with items and debris after the earthquake. Dimond High School senior Anna Krsnak was in second period when the earthquake hit.
DOT&PF Construction is starting repair work to the buckled asphalt on the New SewardHighway between Tudor Road and 36th Avenue. Use Trunk Road detour via the Parks Highway to access Palmer. If you are traveling in the Anchorage area today, please watch out for our bridge inspectors. They will have lights and reflective vests and are in the process of conducting technical bridge inspections.
Interactive Earthquake Map
Though earthquakes are common in Alaska, they often occur out at sea. This earthquake is more similar to the 2001 Nisqually earthquake located near Tacoma, Washington, than to the 1964 megathrust earthquake. The earthquake drew instant comparisons to the one that heavily damaged downtown Anchorage in 1964. Maintenance and operations will be responding to any reports of damage and inspecting all bridges.
There will likely be vigorous aftershocks in the magnitude 4-5 range over the weeks and months following the January 23, 2018 earthquake, with aftershocks in the M6 range also possible, but less frequent. There is a small, but non-zero chance of the M 7.9 January 23, 2018 earthquake triggering a nearby event of comparable size or larger. Large quakes can cause well-water levels in areas far away from the quake to either drop or rise, depending on the local geology near the well, but not all wells show this effect.
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The rupture length of this event was approximately 1200 km, making it the longest observed aftershock zone of all the historic Aleutian arc events. Although only limited seismic data from this event are still available, significant damage and tsunamis were observed on the islands of Adak and Unimak with tsunami heights of approximately 13 m. Tectonics in Southeast Alaska are also driven by the movement of the Pacific Plate, but in a different way. As the plate inches toward the northwest, it grinds past Southeast Alaska and British Columbia. Unlike the subduction zone, these faults slip primarily in a side-to-side motion, with a different tectonic plate on each side.
Paving in the winter isn’t ideal, but it’s also not impossible. Here are some steps that we’re going to take that will allow us to repair asphalt damaged by the 2018 earthquake. Grog Shop owner Mel Strydom reported no damage at the Pioneer Avenue liquor store as well as the Rum Locker and Grog Shop East stores. He was more worried about being able to get supplies coming down from Anchorage on the Seward and Sterling Highways that had been damaged in the quake. Infrastructure and roads around Anchorage, Wasilla and Palmer were badly damaged. The Alaska Department of Transportation temporarily closed the Seward Highway at mile marker 112 due to a rockslide.
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Assessments on critical state facilities have been completed or are scheduled for completion in the next 2 days. Since the 1964 Alaskan earthquake, a magnitude 9.2, Alaska has had 144 earthquakes above magnitude 6. Because scientists were looking at potential sources of landslides, they had to look at a worst-case scenario of the furthest distance from a possible tsunami and the time it would take to reach impacted areas. When no waves were observed hitting tide gauges in those areas, the center canceled the warning.
We are updating the earthquake website with the latest information. All DOT&PF Bridge inspectors are now in Southcentral Alaska and are conducting technical bridge inspections. Two inspection teams are covering the Glenn and Parks Highways, a third team is covering the Anchorage urban area, and a fourth inspection team is inspecting the bases of high mast towers. We are conducting inspections for all bridges in the earthquake affected area—250 bridge inspections—including state and local bridges. MSCVE offices are still closed due to earthquake damage in their building. Staff is working from remote locations and permits can still be issued.
Anchorage Earthquake
This is a different mechanism than megathrust faults in the region, which do occur on the plate boundary itself. This faulting in the Pacific Plate is caused by downward bending while the plate is being forced under Alaska. Southern Alaska lies at the eastern end of the Aleutian Trench, where the Pacific Plate is subducting beneath the North American Plate. Near Anchorage, the plates are converging at a rate of 57 mm per year. The region has experienced severe earthquakes in the past, including several megathrust earthquakes. The 1964 earthquake, with a magnitude of 9.2, was the largest earthquake in American history and the second largest to ever be recorded anywhere in the world.
The hospital went to Hospital Incident Command System, or HICS, Level 1 right after the quake, and looked for possible damage. After the tsunami warning it went to HICS 2, said SPH Spokesperson Derotha Ferraro. “However, we don’t have any borough roads completely closed at this time.
They have some damage and flights may be impacted, travelers should call their individual carriers. Bridges and roadways north of Talkeetna have been reviewed and are clear. Roads in the Anchorage area and some leading to the airport are impassible.
While these models are relatively simple, initial reports support these conclusions. This photo provided by David Harper shows merchandise that fell off the shelves during an earthquake at a store in Anchorage, Alaska, on Friday, Nov. 30, 2018. Near the location of the January 23 earthquake, the Pacific Plate is moving to the north-northwest, toward the North American Plate at a rate of approximately 59 mm/year .
The earthquakes caused by this movement are shallow and occur primarily in the crust of the earth. This is a well-developed fault system that has been active for tens of millions of years and in historic times has hosted numerous earthquakes approaching magnitude 8. The 2013 magnitude 7.5 Queen Charlotte Fault Earthquake is a recent example. After this morning’s earthquake we have reports of damage in Anchorage and surrounding areas. Our crews are out in force to inspect roads and bridges and the Alaska Marine Highway System is on alert.
He realized it was an earthquake when the road started bouncing up and down and the swaying streetlights began to flicker. When he got to his office, furniture had toppled over and had partially blocked a hallway as people were evacuating. Images of the wrecked road circulated nationally all weekend, an emblem of the destructive force that Alaskans endured when the magnitude 7.0 earthquake struck on Friday. The frightful scene elicited astonishment that anyone could have survived.
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