Laconia is located close to the center of New Hampshire. Laconia is part of Belknap County. Laconia has 20.06 square miles of land area and 6.52 square miles of water area. As of 2010-2014, the total Laconia population is 16,007, which has shrunk 2.46% since 2000. The population growth rate is much lower than the state average rate of 6.90% and is much lower than the national average rate of 11.61%.
Earthquakes generate three types of seismic waves: P (primary) waves, S (secondary) waves and surface waves, which arrive at seismic recording stations one after another. Both P and S waves penetrate the interior of the Earth while surface waves do not. Due to this, P and S waves are known as body waves.
There are three basic types of seismic waves â P-waves4, S-waves5 and surface waves. P-waves and S-waves are sometimes collectively called body waves. P-waves, also known as primary waves or pressure waves, travel at the greatest velocity6 through the Earth. When they travel through air, they take the form of sound waves â they travel at the speed of sound (330 ms-1) through air but may travel at 5000 ms-1 in granite7. Because of their speed, they are the first waves to be recorded by a seismograph8 during an earthquake.