The Feared Cascadia 9.0 Earthquake: Potential Consequences Are Scary
The United States has a long history of major earthquakes, dating back to when humans started keeping records of these disasters. Take California, for instance, where earthquakes occur daily, although most are too small to notice. The USGS has set up a large network of sensors to detect these tremors. However, one of the most notable earthquakes in US history struck the Oregon Coast several centuries ago, causing significant damage in the Cascadia subduction zone. Keep watching as the impact of this past megathrust earthquake might be our only clue into the feared impending Cascadia 9.0 earthquake.
Around 2,100 years ago, a cataclysmic event led to the creation of numerous "ghost forests," with some located over a mile inland. This disaster devastated millions of trees across a 620-mile stretch from Eureka, California, to the western part of Vancouver Island, Canada. Within just 3 to 5 minutes, the ground across approximately 55,000 square kilometers—equivalent to the size of West Virginia—sank by 2 to 6 feet. Most of this subsidence occurred underwater, but a portion affected land, submerging previously healthy coastal forests below sea level. Following the ground subsidence, a powerful tsunami struck, flooding areas up to 10 miles (16 kilometers) inland. The saltwater overwhelmed the trees, which were already stressed by being submerged, leading to their rapid demise. The remains of these trees became petrified, lying below high tide for centuries. Eventually, geological processes like sediment deposition and long-term uplift moved the shoreline westward, revealing the ancient remains of the trees.
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Credits: Ron Miller, Mark A. Garlick / MarkGarlick.com ,Elon Musk/SpaceX/ Flickr
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00:00 Intro
00:55 What Happened In the Past
4:20 The Potential Consequences
6:02 P and S waves explained
9:34 How will Tsunami Aggravate This Catastrophic Event?
11:00 The Hypothetical Tsunami generated
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#insanecuriosity #cascadia #naturaldisasters
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