Why Earthquakes Are So Hard To Predict

Hi, this is Alex, from MinuteEarth. San Francisco has been hit by a gigantic earthquake at the least once every hundred years going back so far as we all know. So the individuals of San Francisco know that someday in the subsequent a hundred years, theyre prone to get shaken again by way of a enormous quake. But we can’t say exactly when the quake would hit. Right now, all we will do is assemble shake-proof buildings and put out seismic sensors. That means, when an earthquake sends out underground waves, which travel from its epicenter eight occasions rapid than […]

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Volcanic evolution of the Pacific Northwest: 55 million year history

Active volcanoes in the Pacific Northwest result from a varied tectonic setting. Ocean-ridge rifting produces submarine volcanism offshore. Northwest subduction of the young Juan de Fuca Plate creates the arc of Cascades volcanoes. Hot-spot volcanism drives the Yellowstone caldera system. Continental extension plus a northward migrating triple junction add to the complex volcanic history. To look at the development of volcanism in the Pacific Northwest we will go back 55 million years to a time prior to stretching of the continent by Basin-and-Range extension and when Mesozoic subduction, compression, and crustal thickening had waned. At the end of the Cretaceous, […]

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1964 Quake: The Great Alaska Earthquake

George Plafker: "the whole thing was once in chaos…" artwork Grantz: "i might not ever seen some thing that damaging that close up …" Narrator: In 1964, Alaska was shaken by using the largest U.S. Earthquake ever recorded: Magnitude 9.2. Narrator: Shaking went on for over four minutes. One hundred forty three folks died. Complete property loss in 2013 greenbacks is estimated at 2.Three billion. There were gaping fractures, significant landslides, and the destruction of water mains, gasoline, sewer, cell and electrical programs. Narrator: The epicenter used to be in Prince William Sound, seventy four miles southeast of Anchorage. Yet […]

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Don’t Worry About That Asteroid That Might Hit This Year | SciShow News

Due to Skillshare for assisting this episode of SciShow. Click on the hyperlink within the description to gain knowledge of more about Skillshare. I dont want to alarm you, but chances are that some headline already has, on the grounds that an asteroid the size of a football area could hit Earth this year. But the truth is, there’s an highly low risk of that without a doubt going down, and despite the fact that it does, it most commonly wont cause so much injury. The asteroid in question is referred to as 2006QV89.Its estimated to be about 40 meters […]

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