Current location - Recipe Complete Network - Complete breakfast recipes - 2065438+April 9, 2004, a strong earthquake above 10 occurred in Rushan, Weihai. Why?
2065438+April 9, 2004, a strong earthquake above 10 occurred in Rushan, Weihai. Why?
Since the earthquake of magnitude 4.4 occurred on April 4th, up to April 7th, the number of earthquakes in Rushan, Weihai has reached as high as 90, with an average of about 20 small earthquakes every day, including 7 earthquakes of magnitude 2.0 or above, and others are very small earthquakes.

Every earthquake is accompanied by a loud noise-this phenomenon belongs to "earth sound". "Earthquake" is the sound from deep underground before the earthquake. Earthquakes usually occur minutes, hours, days or earlier before earthquakes; It appears at most a few minutes before the earthquake is about to happen.