DenmarkChapter 4
Of course there was something wrong with her compass. She unshipped the gimbals by shaking it. A compass is affected by sudden acceleration and deceleration. THEY said it was an earthquake. A rapid movement of the earth’s crust. This rapid movement can be sideways or up and down. This up or down movement also lifts or lowers a column of water over the site of the slippage. The vertical movement or P wave is seventeen thousand, six hundred forty MILES an hour (4.9 miles a second.) Throw a...