Skip to main content
U.S. flag

An official website of the United States government

Two Well Depths

Detailed Description

The graph above shows measured depth to water level in feet below land surface for these two wells for January 21 to 25, 2018, which includes the period for a large earthquake in Alaska on January 23, 2018. The top line (blue) is the water level recorded in the Connecticut well (USGS 414831072173002) with depth below land surface shown on the left axis, and the bottom line (red) is the recorded water level in the Virginia well (USGS 370812080261901) with depth below land surface shown on the right axis. The data indicate a possible groundwater-level change in the Virginia well due to the earthquake, but no change was measured in the Connecticut well. (These data are preliminary or provisional and are subject to revision. Water levels have not been corrected for barometric pressure and Earth tide affects.)


Public Domain.