7.1 is pretty major. Did you guys sleep through the after shock? 4.3? Hope all is well.
NRA LIFE MEMBER GOD BLESS OUR TROOPS ESPECIALLY THE SNIPERS! "Suppose you were an idiot And suppose you were a member of Congress... But I repeat myself." -Mark Twain
The depth (76 miles) and location of this earthquake indicate that it occurred inside the subducting Pacific Plate rather than at the place interface. The rupture was caused by extension of the plate as it is pulled into the mantle by its own weight.
This is a common type of event for this region and depth. However, at magnitude 7.1 it is the largest intermediate-depth earthquake recorded beneath Cook Inlet since the regional seismic network was established in late 1960s. Earthquakes of similar sizes occurred in the Lower Cook Inlet in 1912 and 1933, but we do not have precise magnitudes and locations for that time period.
We recorded about 30 aftershocks in the first 2.5 hours after the earthquake. The largest was a magnitude 4.3 at 12:37 UTC (3:37 am local). Aftershocks are continuing at a steady rate and can be expected to go on for several months, although the rate of aftershocks should decrease considerably after a couple of weeks.
It woke Etta and I out of a sound sleep here in Wasilla. No real damage other than one of her angel figurines lost a few body parts when it fell to the floor.
Chronographs, bore scopes and pattern boards have broke a lot of hearts.
The wife rousted me outa bed, or would have slept through it! It sure had some hang time. Hope all is well on the KP Ironbeder, et al(that means and others )
Fairbanks street lights swayed from that quaker, 29 gallon fish tank had a tsunami. Pretty good quaker that shimmies 400 miles away. (I'm sure I would have slept through but for our earthquake sensor, a cheap wood closet door, that started creaking for a good while before the shimmying hit.) Glad people closer seem to be okay.
Sometimes, the air you 'let in'matters less than the air you 'let out'.
Earthquake cross section through the Cook Inlet region Here is a cross section through the Cook Inlet region. The circles are historical earthquakes. Note that this morning’s earthquake occurred inside the Pacific Plate. This is a frequent source of earthquakes in the region. Its depth is very important because it demonstrates that the earthquake has nothing to do with processes in the crust including known faults, volcanoes, bodies of water, sedimentary basins---or any other type of local geology. This earthquake occurred in what was once (millions of years ago) the crust under the Pacific Ocean. As the Pacific Plate is pulled slowly into the earth (a couple inches per year), the stretching creates earthquake. The location, fault orientation, and slip of the M7.1 earthquake align perfectly with this stretching action.
If you take the time it takes, it takes less time. --Pat Parelli
American by birth; Alaskan by choice. --ironbender
We were rolling pretty good in the 4th floor of the Marriot anchorage last night. We spent 2 hours outside in the truck, waiting for the lobby to clear of folks and mgmt to give the all clear that gas lines were intact. That was one of two big ones I remember since I got here in 95. My lovely bride lived thru the Loma Prieta quake in 89, so keeping her calm was probably the most exciting part of the evening!
Earthquake cross section through the Cook Inlet region Here is a cross section through the Cook Inlet region. The circles are historical earthquakes. Note that this morning’s earthquake occurred inside the Pacific Plate. This is a frequent source of earthquakes in the region. Its depth is very important because it demonstrates that the earthquake has nothing to do with processes in the crust including known faults, volcanoes, bodies of water, sedimentary basins---or any other type of local geology. This earthquake occurred in what was once (millions of years ago) the crust under the Pacific Ocean. As the Pacific Plate is pulled slowly into the earth (a couple inches per year), the stretching creates earthquake. The location, fault orientation, and slip of the M7.1 earthquake align perfectly with this stretching action.
Can't have happened. The universe is 6,000 years old and was created as is, unchanging.
Earthquake cross section through the Cook Inlet region Here is a cross section through the Cook Inlet region. The circles are historical earthquakes. Note that this morning’s earthquake occurred inside the Pacific Plate. This is a frequent source of earthquakes in the region. Its depth is very important because it demonstrates that the earthquake has nothing to do with processes in the crust including known faults, volcanoes, bodies of water, sedimentary basins---or any other type of local geology. This earthquake occurred in what was once (millions of years ago) the crust under the Pacific Ocean. As the Pacific Plate is pulled slowly into the earth (a couple inches per year), the stretching creates earthquake. The location, fault orientation, and slip of the M7.1 earthquake align perfectly with this stretching action.
That's great! Where did you get this?
Really shows the subduction zone. Funny how this wasn't really known until plate tectonics theory in the 1960's!
Only criticism is the directions (NW-SE) should be reversed!
Earthquake cross section through the Cook Inlet region Here is a cross section through the Cook Inlet region. The circles are historical earthquakes. Note that this morning’s earthquake occurred inside the Pacific Plate. This is a frequent source of earthquakes in the region. Its depth is very important because it demonstrates that the earthquake has nothing to do with processes in the crust including known faults, volcanoes, bodies of water, sedimentary basins---or any other type of local geology. This earthquake occurred in what was once (millions of years ago) the crust under the Pacific Ocean. As the Pacific Plate is pulled slowly into the earth (a couple inches per year), the stretching creates earthquake. The location, fault orientation, and slip of the M7.1 earthquake align perfectly with this stretching action.
That's great! Where did you get this?
Really shows the subduction zone. Funny how this wasn't really known until plate tectonics theory in the 1960's!
Only criticism is the directions (NW-SE) should be reversed!
Heard from our friend out on FRR, said it shook him awake and emptied some of his cupboards, gonna need some new wine glasses by the sounds of it. No structural damage.
"The day I went to work everybody showed up to watch Johnny Luster work. Well, they had a wheelbarrow there, and said I was to push that thing around all day. I looked at it, then turned around and headed for the mountians..."
Thank you Ironbender, that's just the geo in me with cross sections. Usually do x-sections south left to north right, west to east same. That one I would do SE to NW left to right. Mining engineers on the other hand often do them back to front.....