Why do Earthquakes Happen ?
Earthquakes are caused when the earth’s plates build up friction between each other and become stuck. Since they’re still trying to move though, pressure starts building up until it overcomes the friction, then the plates shift suddenly and violently, creating seismic energy waves.
What are Tsunamis?
The Bay Area is a seismically veryactive region. On average, there are 20 or more earthquakes every day in the greater Bay Area. Hundreds of sensitive seismic instruments record these earthquakes. Many of the earthquales are too small or too deep to be felt. Understanding the frequency and location of past earthquakes—both large and small—is important for detecting locations of faults and determining where future earthquakes might occur.
This maps shows M2+ earthquakes that occurred between 1960 and 2009. Click on the marker for a pop-up balloon with more information, including the depth beneath the surface.
More on earthquakes
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Earthquakes in the Bay Area, California
The Bay Area is a seismically veryactive region. On average, there are 20 or more earthquakes every day in the greater Bay Area. Hundreds of sensitive seismic instruments record these earthquakes. Many of the earthquales are too small or too deep to be felt. Understanding the frequency and location of past earthquakes—both large and small—is important for detecting locations of faults and determining where future earthquakes might occur. This maps shows M2+ earthquakes that occurred between 1960 and 2009. Click on the marker for a pop-up balloon with more information, including the depth beneath the surface. red by JoomlaGadgets…