How can an earthquake affect groundwater or changes in wells?
Groundwater levels in wells may oscillate up and down while seismic waves pass, and in some cases, the water level may remain higher or lower for a period of time after the seismic wavetrain has ended.
Why do earthquakes in other countries seem to cause more damage and casualties than earthquakes in the U.S.?
One week ago, on January 23rd at 12:31 a.m. local time, Alaskans were rocked by a magnitude 7.9 earthquake, with an epicenter in the Gulf of Alaska, about 350 miles southwest of Anchorage, and about 175 miles southeast of Kodiak Island.
At 12:32 am Alaska time on January 23, 2018, a magnitude 7.9 earthquake shook Alaska residents out of their beds and set off fears of a tsunami all down the West Coast. Fortunately, the tsunami was only a few inches in height, but within an hour of the earthquake in Alaska, waves of a different sort were hitting far away in Florida.
Why does the 1964 Great Alaska Earthquake Matter 50 Years Later? Scientific experts will talk about a half-century of scientific and monitoring advances triggered by the 1964 events.
Examples of hydrographs indicating possible groundwater level changes due to January 23, 2018, Gulf of Alaska M7.9 earthquake. (These data are preliminary or provisional and are subject to revision.) These provisional data are presented in a combined, simplified figure to highlight the observed...
Extensive damage in residential area in Mianyang.
Hydrographs from two USGS groundwater monitoring sites in Florida show effects on groundwater levels from the M7.9 earthquake near Kodiak, Alaska.