In addition to the magnitude of the shakes, I was always amazed by the duration.
The earthquake lasted approximately 4.5 minutes.
http://earthquake.usgs.gov/earthquakes/events/alaska1964/
I’ve been in small earthquakes. They were all like a second or 3 at the max.
Fracking?
I was in the 6.8 Nisqually quake in 2001. It lasted about 30 seconds. That was quite long enough for me.
They say that if the Cascadia Subduction Zone does the “full 9.0 rip”, it could shake for as long....if not longer...than the Alaska quake.
The Koch Bros induced polar bears to rise up against climate change and the resulting stampede caused this earthquake, in the past.
IIRC, my readings on some aspects of this quake was there were vertical displacements of nearly 60 feet. That would seriously ruin your day.
I had some of my relatives in South Louisiana who reported seeing some of these events.
https://gsa.confex.com/gsa/2011SC/finalprogram/abstract_186940.htm
EFFECTS OF THE 1964 ALASKAN EARTHQUAKE ON SOUTH LOUISIANA AND SOUTH TEXAS
GAGLIANO, Sherwood M., Coastal Environments, Inc, 1260 Main St, Baton Rouge, LA 70802, sgagliano@coastalenv.com
On March 27, 1964, unusual water seiches and felt effects occurred across the Northern Gulf region from the Chandeleur Islands, Louisiana to Freeport, Texas. These effects, chronicled on the front pages of the region’s newspapers, have been attributed to long-period surface shock waves from the magnitude 8.3 Prince William Sound, Alaska earthquake more than 3000 miles away. Re-evaluation of this event, which has attracted little attention from earth scientists, within the context of a revised regional structural model contributes significantly to understanding neotectonics in the Northern Gulf. The model relates distinctive geomorphic signatures of faults to known subsurface faults and fractures. Movements induced by the 1964 event identify live faults within the structural framework.
A series of 5 or 6 waves with peak-to-point amplitudes of one to two meters over a period of 20 to 30 minutes were reported at numerous locations including the Industrial Canal New Orleans, Krotz Springs, Golden Meadow, in Louisiana and Beaumont-Port Arthur, and Houston in Texas. Ocean going vessels were lifted and debris was churned from stream bottoms. Felt reports suggest that shock waves also triggered secondary earthquakes along local faults. A Rice University seismologist reported that Houston was lifted 10 cm as the gigantic surface wave passed through.