Discover and read the best of Twitter Threads about #AlaskaEarthquake

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Today is the anniversary of the M9.2 #AlaskaEarthquake. Since I'm currently teleworking from right above the rupture zone, I'd like to tell you about Dr. Ruth A. M. Schmidt.

On March 27th, 1964, Ruth and four others were on top of a frozen glacier lake. The ice began to crack…
"I first recall a distant roar sound then the lake began to violently vibrate … The ice was now heaving up and down in big surges … We noticed small cracks (couple inches wide) running great distances … I could hear these cracks forming" Arthur Kennedy, pubs.usgs.gov/pp/0544a/pp544…
For full minutes their world shook, keeping each of them pinned as deep booming was cut by sharp cracks of ice fracturing. When shaking subsided, Ruth and her colleague fled incoming snow avalanches and met their group in the middle of the lake. All accounted for, thank goodness.
Read 14 tweets
The Great Alaska Earthquake occurred on March 27, 1964 and rocked the state with strong ground shaking that lasted four and a half minutes. #AlaskaEarthquake #earthquake
At M9.2, it was the 2nd largest quake ever recorded. This event also rocked the scientific community by confirming a major principle of #platetectonics with the observation that the oceanic Pacific Plate dives beneath the continental North American Plate at the Aleutian trench.
On average, #Alaska has 24,000+ measured earthquakes every year. Usually, there is at least one M7 every year. Between 1899 and 1986, eight #earthquakes of M8 or greater impacted different areas of the Aleutian subduction zone.
Read 19 tweets
I just got sent home from work after a massive earthquake in Anchorage, #Alaska :
Read 11 tweets

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