Authorities have issued a tsunami warning after a severe earthquake in Northern California, America, on Thursday. According to the US Geological Survey, the earthquake struck at 10:44 a.m. west of Ferndale, a small town in Humboldt County near the Oregon border.
According to the information, the tremors of the earthquake were felt till San Francisco. People told that the tremors were so strong that they felt as if they were on a swing. After this, several tremors were felt one after the other.
The San Francisco Bay Area Rapid Transit District (BART) has halted all traffic through the underwater tunnel between San Francisco and Oakland.
7.0 magnitude earthquake
According to the US Geological Survey, after this 7.0 magnitude earthquake, at least 5.3 million people in California are at risk of tsunami. The USGS estimated that about 1.3 million people lived in areas where they may have felt the earthquake.
In the Santa Cruz area, a tsunami warning was issued by the National Weather Service, saying, “Strong waves and currents may impact coastal areas near you.” You are in danger. Stay away from coastal areas. Go to higher places or inside. Stay away from the coast until local authorities direct you to return safely.
Also read: Sound like explosion and tremors of earthquake… The entire village was in panic, more than 280 people were shifted.
Why do earthquakes occur?
There are seven tectonic plates inside the earth. These plates keep rotating continuously. When these plates collide with each other, they rub. When they climb over each other or move away from them, the ground starts shaking. This is called earthquake. Richter scale is used to measure earthquakes. Which is called Richter Magnitude Scale. The Richter magnitude scale ranges from 1 to 9.
The intensity of an earthquake is measured from its center i.e. epicenter. That means the energy coming out from that center is measured on this scale. 1 means low intensity energy is coming out. 9 means the highest. Very frightening and destructive wave. They become weaker as they move away. If the intensity is 7 on the Richter scale, then there is a strong shock within a radius of 40 kilometers around it.
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