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Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more.From tech to household and wellness products. Britannica Explains In these videos, Britannica explains a variety of topics and answers frequently asked questions.This Time in History In these videos, find out what happened this month (or any month!) in history.#WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find.Demystified Videos In Demystified, Britannica has all the answers to your burning questions.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives.While there's no way to predict the time and place of an earthquake, statistical analysis of past earthquakes has shown that the chance of large earthquakes is elevated during earthquake swarms.Īround half of the earthquake swarms recorded in the area are over within a week, and the USGS will continue to monitor seismic activity throughout the region. The USGS says the probability of this happening is "very small." However, if such an earthquake were to occur it would have "serious impacts on communities nearby." It would also be followed by aftershocks that would increase the number of smaller earthquakes each day. This happened in 1981, when a magnitude 5.4 earthquake hit the region during a swarm.Īnother possibility, though the weakest of the three, is that a much larger earthquake, magnitude 7 or higher, could hit within the next seven days. "Earthquakes of this size could cause damage around the area close to the earthquakes that have already occurred and would be followed by aftershocks that would increase the number of smaller earthquakes per day," the USGS said. Quakes on Notorious Segment of San Andreas Driven by Deep, Boiling Forces.Yellowstone Volcano Earthquake Swarm Sees 100 Events Recorded in One Day.San Diego Trembles Under 4.6 Magnitude Earthquake Amid Ongoing Wildfires.The second most likely scenario is that a larger earthquake, between magnitude 5.5 and 6.9, could hit within the next seven days.
The most likely scenario is that the rate of earthquakes in the swarm will decrease over the next seven days, though moderately sized as they may be-magnitude 4.5 to 5.4 is the estimation-they could still be significant enough to cause localised damage.
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Currently, the swarm is rapidly evolving, and we expect to update this forecast with more specific probability information as we collect more data." "During this earthquake swarm, the probability of larger earthquakes in this region is significantly greater than usual. Geological Survey (USGS) said in a statement. "In a typical week, there is approximately a three in 10,000 chance of a magnitude 7+ earthquake in the vicinity of this swarm,' the U.S. local time on September 30, but bigger quakes are a possibility. The biggest earthquake that has been recorded in the swarm so far was a magnitude 4.9, which hit at 5.31 p.m. A swarm of more than 400 earthquakes has hit California in the area between the San Andreas fault and the Imperial fault, with further seismic activity and potentially larger earthquakes set to follow over the next week.
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